n.t. 3523a Xg0x

N.T. 3523A XG0X

FAULT FINDING ABS - Electronic stability program MK60

This note cancels and replaces pages 38-1 to 38-73 of section 3 in Workshop Repair Manual 341

77 11 305 382

JUNE 2001

"The Repair Steps given by the manufacturer in this document are based on the technical specifications current when it was prepared. The steps may be modified as a result of changes introduced by the manufacturer in the production of the various component units and accessories from which his vehicles are constructed."

EDITION ANGLAISE All copyrights reserved by Renault. Copying or translating, in part or in full, of this document or use of the service part reference numbering system is forbidden without the prior written authority of Renault.

\u00a9 RENAULT 2001

Chassis

Contents

Page

38 ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM Introduction Interpretation of faults Conformity check Help Interpretation of states Customer complaints Fault finding chart

38-1 38-2 38-58 38-59 38-61 38-64 38-64

ABS/ESP MK 60

ELECTRONICALLY CONTROLLED 138HYDRAULIC SYSTEM ABS and MK 60 electronic stability program

38

FAULT FINDING - INTRODUCTION This document provides details of fault finding strategies for ABS and the MK 60 ESP (Electronic Stability Program) installed in the LAGUNA II. In order to implement fault finding on this system, it is essential to have the following items available: \ u 2 0 1 3 The wiring diagram of the function for the vehicle concerned, \ u 2 0 1 3 The tools listed under the heading "Special tooling required".

GENERAL APPROACH TO FAULT FINDING: \ u 2 0 1 3 Use one of the fault finding tools to identify the system fitted to the vehicle (read the computer group, the program number, the Vdiag, etc.). \ u 2 0 1 3 Locate the "Fault Finding" documents corresponding to the system identified. \ u 2 0 1 3 Take note of information contained in the introductory sections. \ u 2 0 1 3 Read the faults stored in the computer memory and use the "Fault interpretation" section of the documents. Reminder: each fault is interpreted for a particular type of storage (fault present, fault stored in memory, fault present or stored). The checks defined for dealing with each fault are therefore only to be performed if the fault recorded by the fault finding tool is interpreted in the document for the appropriate storage type. The storage type should be considered when using the fault finding tool after the ignition has been switched off and switched back on. If a fault is interpreted when it is recorded as "stored", the application conditions for the fault finding procedure appear in the "Notes" box. In the event that these conditions are not fulfilled, use the fault finding procedure to check the circuit of the faulty part since the fault is no longer present on the vehicle. Perform the same operation when a fault is recorded as stored by the fault finding tool but is only interpreted in the documentation as a "present" fault. \ u 2 0 1 3 Carry out the conformity check (appearance of possible faults not yet identified by the system's self diagnosis procedure) and implement the relevant fault finding strategies according to the results. \ u 2 0 1 3 Confirm repair (disappearance of the problem reported by the customer). \ u 2 0 1 3 Use the fault finding strategy for each "Customer complaint" if the problem persists.

Special tooling required for operations on ABS ESP MK60: \u2013 Fault finding tools (except XR 25), \u2013 Multimeter.

74MK60080C1.0

38-1

ABS/ESP MK 60

ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM ABS and MK 60 electronic stability program

38

FAULT FINDING - FAULT INTERPRETATION

FRONT LEFT WHEEL SPEED SENSOR CIRCUIT. DF006 present

NOTES

Special notes: None.

Check the connection and the condition of the sensor connections. Check and ensure the continuity of the following connections: Sensor connector track 1 Sensor connector track 2

track 46 Computer connector track 45 Computer connector

Also check the insulation between these two connections. Carry out a visual inspection of the sensor wiring and check the quality of the connections on the 47-track connector of the computer.

If the results of the checks are correct, reconnect the computer and the wheel speed sensor and then clear the computer memory. Exit fault finding mode and switch off the ignition. Switch the ignition on and replace the sensor if the fault recurs.

AFTER REPAIR

Clear the computer memory. Perform a road test and then re-check with the fault finding tool. 74MK60080C1.0

38-2

ABS/ESP MK 60


38


REAR LEFT WHEEL SPEED SENSOR CIRCUIT. DF007 present

NOTES


Check the connection and the condition of the sensor connections. Check and ensure the continuity of the following connections: Sensor connector track 1 Sensor connector track 2


Also check the insulation between these two connections. Carry out a visual inspection of the sensor wiring and check the quality of the connections on the 47-track connector of the computer.


AFTER REPAIR


38-3

ABS/ESP MK 60


38


FRONT LEFT WHEEL SPEED SENSOR SIGNAL. DF008 stored

Processing priority in the event of a number of faults: Firstly, deal with the "DF006 Front left wheel speed sensor circuit" fault, if it is present. NOTES

Conditions for implementing the fault finding procedure on stored faults: The fault is present during: road test (in excess of 12 mph (20 km/h) for 2 minutes).

Check that the wheel speed sensor mounting is in good condition (correct clipping). Check the sensor/target air gap over one wheel revolution: 0.1 mm < front wheel air gap < 1.1 mm Check the conformity of the target (condition, number of teeth = 48) using the "target teeth check" command.

Check the connection and the condition of the sensor connections. Carry out a visual inspection of the sensor wiring and check the quality of the connections on the 47-track connector of the computer.

If the results of the checks are correct, reconnect the computer and the wheel speed sensor and then clear the computer memory. Exit the fault finding procedure and carry out a road test. Replace the sensor if the fault recurs.

AFTER REPAIR


38-4

ABS/ESP MK 60


38


REAR LEFT WHEEL SPEED SENSOR SIGNAL. DF009 stored

Processing priority in the event of a number of faults: Firstly, deal with the "DF006 Front left wheel speed sensor circuit" fault, if it is present. NOTES

Conditions for applying the fault finding procedure to stored faults: The fault is recorded as present during: road test (in excess of 12 mph for 2 minutes).

Check that the wheel speed sensor mounting is in good condition (correct clipping). Check the sensor/target air gap over one wheel revolution: 0.3 mm < rear wheel air gap < 1.3 mm. Check the conformity of the target (condition, number of teeth = 48) using the "check target teeth" command.


If the results of the checks are correct, reconnect the computer and the wheel speed sensor and then clear the computer memory. Exit the fault finding procedure and carry out a road test. Replace the sensor if the fault recurs.

AFTER REPAIR


38-5

ABS/ESP MK 60


38


DF010 Present or stored

NOTES

PUMP MOTOR CIRCUIT.

Conditions for applying the fault finding procedure to stored faults: The fault is recorded as present if: brake pedal held down + "Test pump motor" actuator control

Check the ABS earths (tightening of the terminal on the earth bolt above the hydraulic assembly). Check/ensure the continuity between the ABS earth and tracks 47 and 16 of the computer connector. Check the + before ignition feed on track 1 on the 47-track connector. Check the condition and position of the 40A fuse in the engine fuse box.

If the fault occurs after the computer has been removed or replaced, remove the computer and check the condition and presence of the internal connections (2 tracks) crossing the hydraulic assembly.

If the fault recurs, replace the hydraulic assembly (mechanical locking of the pump, etc.).

AFTER REPAIR


38-6

ABS/ESP MK 60


38


DF017 Present or stored

NOTES

COMPUTER.


Check the connections on the 47-track connector of the ABS computer. Check that there are no traces of oxidisation. If traces of oxidisation are found, you must replace the ABS wiring and the computer. If not, replace only the computer.

Clear the computer memory, exit fault finding mode and switch off the ignition. Perform a new check using the fault finding tool. If the fault persists, replace the ABS computer.

AFTER REPAIR


38-7

ABS/ESP MK 60


38


TACHOMETRIC INDEX PROGRAMMING. DF020 present

NOTES

Special notes:

The TEVES MK 60 ABS computer with the "tachometry button" supplies the vehicle speed signal to all areas in the vehicle where this information is needed (instrument panel, engine management, etc...). This vehicle speed signal replaces the one supplied by the speed sensor located on the gearbox. The ABS computer calculates the vehicle speed from the speed of the wheels and the circumference of the tyres fitted to the vehicle.

The tyre circumference must be programmed into the memory of a new computer. This consists of entering an index X using VP007 "TACHOMETRIC INDEX" command on the fault finding tool. Value of index X: All tyre types

X = 64

Except 205/60 R16

X = 119

Once the index has been entered using the Tachometric index command, clear the computer memory and then switch off the ignition. Use the PR030 Tachometric index parameter to check that the index has been entered correctly.

AFTER REPAIR


38-8

ABS/ESP MK 60


38


FRONT RIGHT WHEEL SPEED SENSOR CIRCUIT. DF026 present

NOTES

Special notes:

Check the connection and the condition of the sensor connections. Check the connector on the intermediary connections under the body on the front left upper wing section (R183).

Carry out a visual inspection of the sensor wiring and check the quality of the connections on the 47-track connector of the computer. Check and ensure the continuity and insulation of the following connections: Sensor connector track 1 Sensor connector track 2


If the connection is faulty: Disconnect the intermediate 2-track R183 connector on the front left upper wing section and check the condition of the connections. Check and ensure the continuity of the connections between: Sensor connector track 1 Sensor connector track 2

track B Intermediate connector track A Intermediate connector

Also check the insulation between these connections. Check and ensure the continuity of the connections between: Sensor connector track 33 Sensor connector track 34

track B Intermediate connector track A Intermediate connector

Also check the insulation between these connections.


AFTER REPAIR


38-9

ABS/ESP MK 60


38


REAR RIGHT WHEEL SPEED SENSOR CIRCUIT. DF027 present

NOTES

Special notes:

Check the connection and the condition of the sensor connections. Check and ensure the continuity and insulation of the following connections: Sensor connector track 1 Sensor connector track 2


Also check the insulation between these two connections. Carry out a visual inspection of the sensor wiring and check the quality of the connections on the 47-track connector of the computer connector.


AFTER REPAIR


38-10

ABS/ESP MK 60


38


FRONT RIGHT WHEEL SPEED SENSOR SIGNAL. DF028 stored

Processing priority in the event of a number of faults: Firstly, deal with the "DF026 Right front wheel speed sensor circuit" fault, if it is present. NOTES


Check that the wheel speed sensor mounting is in good condition (correct clipping). Check the sensor/target air gap over one wheel revolution: 0.1 mm < front wheel air gap < 1.1 mm Check the conformity of the target (condition, number of teeth = 48) using the "teeth target check" command.

Check the connection and the condition of the sensor connections. Check the connector on the intermediate connection under the body on the front left upper wing section (R183).

Carry out a visual inspection of the sensor wiring and check the quality of the connections on the 47-track connector of the computer.

If the results of the checks are correct, reconnect the computer and the wheel speed sensor and then clear the computer memory. Exit fault finding mode and perform a road test. Replace the sensor if the fault recurs.

AFTER REPAIR


38-11

ABS/ESP MK 60


38


REAR RIGHT WHEEL SPEED SENSOR SIGNAL. DF029 stored

Processing priority in the event of a number of faults: Firstly, deal with the "DF027 Right rear wheel speed sensor circuit" fault, if it is present. NOTES


Check that the wheel speed sensor mounting is in good condition (correct clipping). Check the sensor/target air gap over one wheel revolution: 0.3 mm < rear wheel air gap < 1.3 Check the conformity of the target (condition, number of teeth = 48) using the "teeth target check" command.


If the results of the checks are correct, reconnect the computer and the wheel speed sensor and then clear the computer memory. Exit fault finding mode and perform a road test. Replace the sensor if the fault recurs.

AFTER REPAIR


38-12

ABS/ESP MK 60


38


MULTIPLEX NETWORK (bus off). DF047 present

NOTES


Carry out the multiplex network test.

AFTER REPAIR


38-13

ABS/ESP MK 60


38


DF056 present or stored

NOTES

BRAKE PEDAL CONTACT CONSISTENCY.

Conditions for applying the fault finding procedure to stored faults: The fault is recorded as present when: the brake pedal is pressed.

Press the brake pedal whilst watching the ET017 BRAKE PEDAL state.

Check that the "pedal released" and "pedal pressed" positions are recognised.

yes

Check the two brake light bulbs and the earth of the rear light units (no earthing of track 41 across the bulbs when pedal is not depressed).

no

Apply the fault finding strategy described in the interpretation of the ET017 BRAKE PEDAL state.

AFTER REPAIR


38-14

ABS/ESP MK 60


38


NO MULTIPLEXED TRANSMISSION FROM INJECTION. DF066 present

NOTES


Perform the multiplex network test.

AFTER REPAIR


38-15

ABS/ESP MK 60

38



STEERING WHEEL ANGLE SENSOR SIGNAL. DF075 stored

NOTES

Conditions for applying the fault finding procedure to stored faults: The fault is recorded as present when: full lock from lock to lock and road test.

After replacing the sensor, re-calibrate the sensor using the fault finding tool. Ensure that the steering wheel angle sensor is correctly installed and positioned on the steering column. (With the wheels straight, check that the yellow marker on the steering wheel angle sensor is visible in the centre of the window and check that the connector is correctly connected to the sensor and not to the inert mounting next to the sensor.)

Position the wheels straight and use the fault finding tool in the parameter category to check that PR033 is between -15° and +15°. If not, check that the yellow marker on the steering wheel angle sensor is visible in the centre of the window. Use the fault finding tool to program the steering wheel angle by selecting command VP003.

If the results of the checks are correct, reconnect the computer and the steering wheel angle sensor and then clear the computer memory. Exit fault finding mode and perform a road test. Replace the sensor if the fault recurs.

AFTER REPAIR


38-16

ABS/ESP MK 60


38



NOTES

YAW SENSOR SIGNAL.

Processing priority in the event of a number of faults: Firstly, deal with the "DF080 lateral speed sensor circuit" fault, if it is present.

Ensure that the positioning and condition are correct, and that the yaw sensor is fixed tightly to the plate (8Nm is the correct tightening torque).Then check that the plate is fixed at 8Nm to the handbrake reinforcement. Finally, check that the reinforcement is fixed to the floor. Check the condition and connection of the yaw sensor connector. Ensure that the connections for the yaw sensors and transverse acceleration sensors have not been connected the wrong way round.

Check the connection and the condition of the computer connectors. Check and ensure the continuity of the following connections: Sensor connector track 1 Sensor connector track 2 Sensor connector track 3

track 40 Computer connector track 24 Computer connector track 26 Computer connector

Also check the insulation between these connections. Carry out a visual inspection of the sensor wiring and check the quality of the connections on the 47-track connector of the computer.

If the results of the checks are correct, reconnect the computer and the yaw sensor and then clear the computer memory. Exit fault finding mode and perform a road test. Replace the sensor if the fault recurs.

AFTER REPAIR


38-17

ABS/ESP MK 60


38


YAW SENSOR CIRCUIT. DF080 present

NOTES





If the results of the checks are correct, reconnect the computer and the yaw sensor and then clear the computer memory. Exit fault finding mode and switch off the ignition. Switch the ignition on and replace the sensor if the fault recurs.

AFTER REPAIR


38-18

ABS/ESP MK 60


38



NOTES

TRANSVERSE ACCELERATION SENSOR SIGNAL.

Processing priority in the event of a number of faults: Firstly, deal with the "DF084 Transverse acceleration sensor circuit" fault, if it is present.

Ensure that the transverse acceleration sensor is correctly positioned and clipped to the plate, and in good condition. Then check that the plate is fixed at 8Nm to the handbrake reinforcement. Finally, check that the reinforcement is fixed to the floor. Check the connection and condition of the transversal acceleration sensor connector. Ensure that the connections for the yaw sensors and transverse acceleration sensors have not been connected the wrong way round.




If the results of the checks are correct, reconnect the computer and the transverse acceleration sensor and then clear the computer memory. Exit fault finding mode and perform a road test. Replace the sensor if the fault recurs.

AFTER REPAIR


38-19

ABS/ESP MK 60


38


TRANSVERSE ACCELERATION SENSOR CIRCUIT. DF084 present

NOTES

Special notes:




If the results of the checks are correct, reconnect the computer and the transversal acceleration speed sensor and then clear the computer memory. Exit fault finding mode and switch off the ignition. Switch the ignition on and replace the sensor if the fault recurs.

AFTER REPAIR


38-20

ABS/ESP MK 60


38


PROGRAMMING THE STEERING WHEEL ANGLE SENSOR. DF087 present

NOTES


Run the VP003 Steering wheel angle" command to program the sensor. If attempts to program fail, replace the steering wheel angle sensor.

AFTER REPAIR


38-21

ABS/ESP MK 60


38


BRAKE PRESSURE SENSOR CIRCUIT. DF088 present

NOTES


Check the condition and correct connection of the brake pressure sensor. Check the connection and the condition of the computer connectors.

Check and ensure the continuity of the following connections: Sensor connector track 1 Sensor connector track 2 Sensor connector track 3


Also check the insulation between these connections. Carry out a visual inspection of the sensor wiring and check the quality of the connections on the 47-track connector of the computer. Disconnect the pressure sensor and check the presence of a connection of around 5 volts under + after ignition feed between tracks 1 and 3 of the sensor connector (ignore any new faults caused by this inspection). If the voltage is approaching 0 volts, replace the computer.

If the results of the checks are correct, reconnect the computer and the brake pressure sensor and then clear the computer memory. Exit fault finding mode and switch off the ignition. Switch the ignition on and replace the sensor if the fault recurs.

AFTER REPAIR


38-22

ABS/ESP MK 60


38


RIGHT FRONT WHEEL TARGET. DF090 stored

NOTES

Conditions for applying the fault finding procedure to stored faults: The fault is recorded as present after: road test.

Check that the sensor holder does not rotate. Check that the wheel speed sensor mounting is in good condition (clipping). Check the conformity of the targets: condition, number of teeth = 48 (using the SC001 check target teeth command).

If the results of the checks are correct, reconnect the computer and the sensors and then clear the computer fault memory. Exit fault finding mode and perform a road test. Replace the instrumented bearing if the fault recurs.

AFTER REPAIR


38-23

ABS/ESP MK 60


38


LEFT FRONT WHEEL TARGET. DF091 stored

NOTES




AFTER REPAIR


38-24

ABS/ESP MK 60


38


RIGHT REAR WHEEL TARGET DF092 stored

NOTES




AFTER REPAIR


38-25

ABS/ESP MK 60


38


LEFT REAR WHEEL TARGET. DF093 stored

NOTES



If the results of the checks are correct, reconnect the computer and the sensors then clear the computer fault memory. Exit the fault finding procedure and perform a road test. Replace the instrumented bearing if the fault recurs.

AFTER REPAIR


38-26

ABS/ESP MK 60


38


DF094/DF095 present or stored

NOTES

COMPUTER SUPPLY VOLTAGE

Special notes: Apply the fault finding strategy below whether the fault is indicated as present or stored. This fault may appear when the engine is started with a battery charger or a 24 volt battery. The undervoltage is ignored unless the vehicle speed exceeds 12 mph (20 km/h). Conditions for applying the fault finding procedure to stored faults: Apply the fault finding strategy whether the fault is present or stored.

Check the presence of + 12 before ignition feed on track 32 of the 47-track computer connector. Perform the operations necessary to obtain the correct + after ignition feed voltage supply to the computer:

10 volts < correct voltage < 17 volts. – Check the battery charge. – Check the charge circuit. – Check the tightening and the condition of the battery terminals. Check the presence of + after ignition feed on track 4 of the 47-track computer connector (5A fuse). Check the presence of + before ignition feed on track 1 and 32 of the 47-track computer connector (30A and 40A fuses located in the engine fuse box). Check that the earths are in good condition (properly tightened, not oxidised, etc.), check the tightness of the terminal on the earth bolt located above the hydraulic assembly.

AFTER REPAIR


38-27

ABS/ESP MK 60


38


COMPUTER INTERNAL ELECTRICAL FAULT. DF096 present

NOTES


Using the fault finding tool, check the FUNCTION CODE NUMBER (CLIP: identification screen and NXR: parameter screen PR041). – If the function code number is A0, B0, C0, (the system is fitted with electronic braking assistance), start the engine and run the AC161 brake servo solenoid valve command. If DF113 Solenoid valve brake servo circuit" appears, apply the fault finding strategy for this fault. If DF113 does not appear, replace the computer. – If the function code number is D0 or E0, (for a system fitted with mechanical emergency brake assist), replace the computer.

AFTER REPAIR


38-28

ABS/ESP MK 60


38


NO AUTOMATIC GEARBOX MULTIPLEXED SIGNAL. DF097 present

NOTES



AFTER REPAIR


38-29

ABS/ESP MK 60


38


NO UCH MULTIPLEXED SIGNAL. DF098 present

NOTES



AFTER REPAIR


38-30

ABS/ESP MK 60


38


PRIVATE ABS MULTIPLEX NETWORK (bus off). DF099 present

NOTES


Ensure that the connections and the position of any special equipment, such as CB, car phone, amplifier, etc... are not preventing the ABS from working correctly. Using the fault finding tool, check the FUNCTION CODE NUMBER (CLIP: identification screen and NXR: parameter screen PR041). – A0, B0, D0 indicate that the system is not fitted with the combined sensor. – C0, E0, F0 indicate that the system is fitted with the combined sensor. If A0, B0, D0, appear, check the connection and condition of the steering wheel angle sensor connector. – Ensure continuity and insulation of the connections between: Computer connector Track 29 Tracks 3 and 4 Steering wheel angle sensor Computer connector Track 25 Steering wheel angle sensor Track 2 If the results of all the checks are correct, replace the steering wheel angle sensor. If C0, E0, F0, appear, check the connection and condition of the combined sensor and the steering wheel angle sensor connectors. – Ensure continuity and insulation of the connections between: Computer connector Track 29 Steering wheel angle sensor + Track 3 Combined sensor Track 2 Computer connector Track 25 Steering wheel angle sensor + Track 2 Combined sensor Track 1 – If the fault persists, switch off the ignition, disconnect the combined sensor, and then switch the ignition back on. Replace the combined sensor if DF099 is stored. Ignore any new faults that appear during the operation. – If DF099 remains present, switch off the ignition, reconnect the combined sensor and disconnect the steering wheel angle sensor. Switch the ignition back on. Replace the steering wheel angle sensor if DF099 is stored. Ignore any new faults that appear during the operation.

If the results of the checks are correct, replace the computer.

AFTER REPAIR


38-31

ABS/ESP MK 60

38



NO STEERING WHEEL ANGLE MULTIPLEXED SIGNAL. DF100 present

NOTES


Check the connection and condition of the steering wheel angle sensor and computer connectors. – Ensure continuity of the following connections: Track 2 of the steering wheel angle sensor Computer connector Track 25 Computer connector Track 29 Track 3 of the steering wheel angle sensor Check the presence of +12 after ignition feed between tracks 1 and 5 of the steering wheel angle sensor. Using the fault finding tool, check the FUNCTION CODE NUMBER (CLIP: identification screen and NXR: parameter screen PR041). If the code number is B0, ensure continuity between tracks 3 and 4 of the steering wheel angle sensor connector. If the fault persists, replace the steering wheel angle sensor.

AFTER REPAIR


38-32

ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM

ABS/ESP MK 60

ABS and MK 60 electronic stability program

38


NO COMBINED SENSOR MULTIPLEXED SIGNAL. DF101 present

NOTES


Check the connection and condition of the combined sensor and computer connectors. Carry out a visual inspection of the sensor wiring. Check and ensure the continuity and insulation of the connections between: Sensor Sensor Sensor Sensor

connector connector connector connector

track 1 track 2 track 3 track 5

track track track track

25 Computer connector 29 Computer connector 6 Computer connector 24 Computer connector

Also check the insulation between these connections. Measure the voltage between tracks 5 and 3 of the steering wheel combined sensor connector under + after ignition feed. Replace the computer if the voltage is not of the same order as that of the + after ignition feed.

If the results of the checks are correct, reconnect the computer and the combined sensor and then clear the computer memory. Exit fault finding mode and switch off the ignition. Switch the ignition on and replace the sensor if the fault recurs.

AFTER REPAIR


38-33

ABS/ESP MK 60

38



DF102 present

NOTES

SAVE CALIBRATION. (Computer configuration and sensor calibration)


Using the fault finding tool, run the following configuration commands: – CF077 ABS/ESP calibration. Calibration is effected by selection of the engine type fitted in the vehicle. – Cruise control distance check: Select command CF078 on the fault finding tool. – Gearbox type: Select command CF079 on the fault finding tool. – Vehicel parameters (drive torque index configuration + brake type): Select command CF080 on the fault finding tool. – To program the steering wheel angle: Select command VP003 on the fault finding tool. – To program the tachometric index: Select command VP007 on the fault finding tool. If attempts to calibrate fail, replace the computer.

AFTER REPAIR


38-34

ABS/ESP MK 60


38


NO MULTIPLEXED ACC SIGNAL. DF103 present

NOTES



AFTER REPAIR


38-35

ABS/ESP MK 60


38


COMBINED SENSOR INTERNAL ELECTRICAL FAULT. DF104 present

NOTES


Replace the combined sensor.

AFTER REPAIR


38-36

ABS/ESP MK 60


38


DF105/DF106 present or stored

NOTES

COMBINED SENSOR SUPPLY VOLTAGE.

Special notes: Firstly, deal with faults DF094 and DF095 "Computer supply voltage" if they are present. Apply the fault finding strategy below whether the fault is indicated as present or stored. The undervoltage is ignored unless the vehicle speed exceeds 12 mph (20 km/ h).

Check the connection and condition of the combined sensor connector. Check the connection and the condition of the computer connectors.

Check and ensure the continuity of the following connections: Sensor connector track 3 Sensor connector track 5

track 6 computer connector track 24 computer connector

Also check the insulation between these connections. Reconnect the computer and measure the voltage under + after ignition feed between tracks 3 and 5 on the sensor connector. If the voltage is not of the same order as that of the + after ignition feed (less than around 1 volt) replace the computer.

If the results of the checks are correct, reconnect the combined sensor and then clear the computer memory. Replace the sensor if the fault recurs.

AFTER REPAIR


38-37

ABS/ESP MK 60


38


STEERING WHEEL ANGLE SENSOR IDENTIFIER. DF107 present

NOTES


Run command VP003 "Steering wheel angle sensor" to program the sensor. If attempts to program fail, replace the steering wheel angle sensor.

AFTER REPAIR


38-38

ABS/ESP MK 60


38



NOTES

STEERING WHEEL ANGLE SENSOR.

Special notes: Ignore this fault if the vehicle is on the dynamometer or if a jack has been placed underneath the vehicle and has not had an effect on the steering wheel angle though it has generated a vehicle speed. Conditions for applying the fault finding procedure to stored faults: Apply the fault finding strategy whether the fault is present or stored.

Check the connection and condition of the steering wheel angle sensor and computer connectors. Using the fault finding tool, check the FUNCTION CODE NUMBER (CLIP: identification screen and NXR: parameter screen PR041).

If the function code number is C0 and E0: – Ensure continuity of the connections between: Computer connector Track 25 Track 2 steering wheel angle sensor Computer connector Track 29 Track 3 steering wheel angle sensor If the function code number is B0: – Ensure continuity of the connections between: Computer connector Track 25 Track 2 steering wheel angle sensor Computer connector Track 29 Tracks 3 and 4 steering wheel angle sensor Check the presence of +12 after ignition feed between tracks 1 and 5 of the steering wheel angle sensor connector.

If the results of the checks are correct, reconnect the computer and the steering wheel angle sensor and then clear the computer memory. Exit fault finding mode and perform a road test. Replace the sensor if the fault recurs.

AFTER REPAIR


38-39

ABS/ESP MK 60


38



BRAKE PRESSURE SENSOR SIGNAL (consistency).

Special notes: Firstly, deal with faults DF088 brake pressure sensor circuit and DF056 brake pedal contact consistency if they are present. NOTES

Conditions for applying the fault finding procedure to stored faults: Apply the fault finding strategy whether the fault is present or stored.

Ensure that there are no leaks in the hydraulic circuit. With the engine switched off, depress the brake pedal several times. After several presses, the pedal should remain stiff. If the pressure sensor has been removed or refitted, an air bubble may have become trapped in the pressure sensor thus modifying the reading issued by the sensor. Remove the sensor and refill with brake fluid before refitting. If the fault persists, replace the brake pressure sensor.

If the results of the checks are correct, reconnect the computer and the brake pressure sensor and then clear the computer memory. Exit fault finding mode and perform a road test. Replace the sensor if the fault recurs.

AFTER REPAIR


38-40

ABS/ESP MK 60


38

FAULT FINDING - FAULT INTERPRETATION DF110 present or stored

SENSOR POWER SUPPLY (sensors other than the wheel speed sensors and the pressure sensors).

Special notes: Check the FUNCTION CODE NUMBER (CLIP: identification screen and NXR: parameter screen PR041). NOTES


If the function code number is: B0 Disconnect all the sensors (lateral acceleration sensor, yaw sensor, pedal movement sensor) and check the presence of + 5 volts under after ignition feed on the tracks of the relevant connectors: – Yaw sensor connector between tracks 3 and 2 – Lateral acceleration sensor connector between tracks 3 and 2 – Brake potentiometer connector between tracks 1 and 2 If the voltage is incorrect, check the wiring loom. Ensure that the connections for the computer and the lateral acceleration and yaw sensors are correctly connected and in good condition. Ensure continuity of the following connections: Track 1 yaw sensor connector Computer connector Track 40 Computer connector Track 6 Track 1 lateral acceleration sensor connector Computer connector Track 26 Track 3 yaw sensor connector Computer connector Track 26 Track 3 lateral acceleration sensor connector Computer connector Track 24 Track 2 yaw sensor connector Computer connector Track 24 Track 2 lateral acceleration sensor connector Also check the insulation between these connections. Ensure that the computer and the brake potentiometer connectors are in good condition and correctly connected. Check and ensure the continuity of the following connections: Sensor connector track 1 track 7 Computer connector Sensor connector track 2 track 5 Computer connector Sensor connector track 3 track 3 Computer connector Also check the insulation between these connections. If the fault persists, replace the computer.

AFTER REPAIR


38-41

ABS/ESP MK 60


38


DF110 continued

Special notes: Check the FUNCTION CODE NUMBER (CLIP: identification screen and NXR: parameter screen PR041). NOTES


If the function code number is: A0 and C0 Check the presence of + 5 volts under after ignition feed between tracks 1 and 2 of the brake potentiometer. If the voltage is incorrect, check the wiring loom. Ensure that the computer and the brake potentiometer connectors are in good condition and correctly connected. Check and ensure the continuity of the following connections: Sensor connector track 1 track 7 Computer connector Sensor connector track 2 track 5 Computer connector Sensor connector track 3 track 3 Computer connector Also check the insulation between these connections. If the fault persists, replace the computer.

AFTER REPAIR


38-42

ABS/ESP MK 60


38


BRAKE PEDAL TRAVEL SENSOR CIRCUIT. DF111 present

NOTES

Special notes: Firstly, deal with fault DF110 "Sensor supply" if it is present.

Check the condition and connection of the brake pedal travel sensor connector.




If the results of the checks are correct, reconnect the computer and the brake pedal travel sensor and then clear the computer memory. Replace the sensor if the fault recurs.

AFTER REPAIR


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BRAKE PEDAL TRAVEL CONSISTENCY. DF112 present

NOTES


Using the fault finding tool, check on the states display that ET017 is correctly detecting the depressed and released positions of the brake pedal. If they are not recognised, use the fault finding strategy for ET017. Check the brake pedal position using PR039 on the fault finding tool. – Pedal released: PR039 < 5.5 mm. If the value is different, replace the sensor.

AFTER REPAIR


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38


BRAKE SERVO SOLENOID VALVE CIRCUIT. DF113 present

NOTES


Check the condition and connection of the brake servo connector.

Check that the computer connections and the 6 tracks of the brake servo are correctly connected and in good condition. Check and ensure the continuity of the following connections: Servo connector track 4 Servo connector track 3


Also check the insulation between these connections. Carry out a visual inspection of the brake servo wiring loom and check the quality of the connections on the 47-track connector of the computer. Check the resistance of the brake servo R = 2 ohms. If the resistance is incorrect, replace the brake servo. Check the presence of + 12 volts after ignition feed on the brake servo connector between track 4 and the earth. If the voltage is incorrect, replace the computer.

If the results of the checks are correct, reconnect the computer and the brake servo and then clear the computer memory. Replace the brake servo if the fault recurs.

AFTER REPAIR


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38


BRAKE SERVO MICROSWITCH CIRCUIT. DF114 present

NOTES


Check the condition and connection of the brake servo connector.

Check the presence of + 12 volts after ignition feed on the disconnected brake servo connector between track 5 and the vehicle earth. If the voltage is incorrect, check the wiring loom. Ensure the continuity and insulation of the connection between: Servo connector track 5

track 28 Computer connector

If the continuity and insulation have been checked and the voltage remains incorrect, replace the ABS/ESP computer. Check that the computer connections and the 6 tracks of the brake servo are correctly connected and in good condition. Check and ensure the continuity of the following connections: Servo connector track 2 Servo connector track 1


Also check the insulation between these connections.

If the results of the checks are correct, reconnect the computer and the brake servo and then clear the computer memory. Replace the brake servo if the fault recurs.

AFTER REPAIR


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38



BRAKE SERVO MICROSWITCH STATE CONSISTENCY. DF115 present

NOTES


Ensure that the brake switch is in correct working order by carrying out the ET017 (state interpretation) procedure. Check the condition and connection of the brake servo. Ensure continuity between tracks 30 and 28 of the released brake pedal computer connector. Ensure continuity between tracks 27 and 28 of the depressed brake pedal computer connector. Check the brake pedal position using PR039 on the fault finding tool. – Pedal released: PR039 < 5.5 mm. If the value is different, replace the sensor.

AFTER REPAIR


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38


VEHICLE CONFIGURATION PROGRAMMING. DF116 present

NOTES


Run the configuration command CF080 "VEHICLE PARAMETERS" in order to define the engine type fitted in the car. If configuration attempts fail, replace the computer.

AFTER REPAIR


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38


ABS/ESP CALIBRATION PROGRAMMING. DF117 present

NOTES


Run the configuration command CF077 "ABS/ESP CALIBRATION". Calibration is effected by selection of the engine type fitted in the vehicle. If configuration attempts fail, replace the computer.

AFTER REPAIR


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38


VEHICLE OPTIONS PROGRAMMING. DF118 present

NOTES


Run the configuration commands CF078 "CRUISE CONTROL DISTANCE CHECK" and CF079 "GEARBOX TYPE" to define the vehicle equipment type. If configuration attempts fail, replace the computer.

AFTER REPAIR


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38


DF119 present

NOTES

GEARBOX TYPE CONFIGURATION (consistency between computer configuration and multiplex network frames).

Processing priority in the event of a number of faults: Firstly, deal with fault DF097 "No automatic gearbox multiplexed signal" if it is present.

Run the configuration command CF079 "GEARBOX TYPE" to reconfigure the gearbox type. If configuration attempts fail, replace the computer.

AFTER REPAIR


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38



NOTES

INJECTION MULTIPLEXED SIGNALS CONSISTENCY.

Conditions for applying the fault finding procedure to stored faults: The fault is recorded as present when: engine is started.

Refer to the injection fault finding procedure.

AFTER REPAIR


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38



NOTES

TORQUE REQUESTED CANNOT BE SUPPLIED.



AFTER REPAIR


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38



NOTES

NO INJECTION MULTIPLEXED SIGNALS.



AFTER REPAIR


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38


COMBINED SENSOR SUPPLY VOLTAGE. DF125 present

NOTES

Processing priority in the event of a number of faults: Firstly, deal with fault DF094/095 "Computer supply voltage" if it is present.

Check the connection and condition of the combined sensor and computer connectors. Switch the ignition on and check the presence of + after ignition feed between tracks 3 and 5 of the sensor connector. – If the voltage is correct, replace the combined sensor. Check and ensure the continuity and insulation of the following connections: Sensor connector Track 3

Track 6 computer connector

Sensor connector Track 5


Also check the insulation between these connections. If the results of the checks are correct, replace the computer.

AFTER REPAIR


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38



NOTES

COMBINED SENSOR SIGNAL PLAUSIBILITY.


Ensure that the combined sensor is in good condition, correctly positioned and tightened to its mounting to 8Nm. Then check that the mounting is fixed to the floor (under the centre console between the gear lever and the handbrake lever). Check the connection and condition of the combined sensor connector. Ensure that the connections, approval and position of any special equipment such as CB, car phone, amplifier, bass speaker (subwoofer type), etc. are not preventing the ABS from working correctly. If the results of the checks are correct, reconnect the computer and the combined sensor and then clear the computer memory. Replace the combined sensor if the fault recurs.

AFTER REPAIR


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38


ELECTRONIC STABILITY PROGRAM FUNCTION. DF155 present

NOTES

Special notes: It is normal for this fault to occur after the vehicle has been driven on a race track (involving high transverse acceleration and without a steering angle value). Ensure that the fault does not occur after the vehicle has been driven at low speed.

Ensure that the transverse acceleration sensors/yaw angle or combined sensor are correctly fixed to the plate and that the whole is fixed to the floor. Check PR033 "Steering wheel angle" when the wheels are straight. Calibrate the steering wheel angle. Replace the steering wheel angle sensor if the calibration has failed or if the value is not between -15 ° and + 15°.

AFTER REPAIR


38-57

38


ABS/ESP MK 60


FAULT FINDING - CONFORMITY CHECK

NOTES

Only check the conformity after a full check using the fault finding tool.

Order

Function

Parameter/state checked or action

Display/notes

Fault finding

1

Fault finding tool dialogue

-

ABS/ESP MK60

FAULT FINDING CHART 1

2

Computer configuration

PR030

3

Detection that the brake pedal ET017 is not depressed

4

Detection that brake pedal is ET017 depressed

5

Detection of electronic stability program activation

6

Detection of electronic stability program activation

ET023

ET023

TACHOMETRIC INDEX

Ensure that the index entered corresponds to the tyres fitted to the vehicle (refer to the "Help" section)

None

BRAKE PEDAL

State 2 "Released" is confirmed when brake pedal is not depressed

ET017

BRAKE PEDAL

State 1 "Depressed" is confirmed when brake pedal is depressed

ET017

ESP start/stop button

State 1 "Depressed" is confirmed when button is pressed

ET023

ESP start/stop button

State 2 "Released" is confirmed when button is released

ET023

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38

FAULT FINDING - HELP Use of command modes: Control of the wheel solenoid valves in order to check the hydraulic system: Lift the vehicle in order to be able to turn the wheels and check that they turn freely. Keep the brake pedal depressed to prevent the wheel to be tested from being turned by hand (do not brake so firmly that full brake power is reached). Select and confirm the command of the wheel being examined ("Front left wheel solenoid valves", etc...) There should be ten cycles of unlocking/locking on the relevant wheel

Pump motor control: Select the "Test pump motor" command. Confirm motor operation for 5 seconds

Bleeding the hydraulic circuits: Apply the procedure described in the "Bleeding the circuits" section of the "Repair step" Technical Note.

Summary of the FUNCTION CODES: – – – – – – –

A0: Electronic ABS + AFU B0: Electronic ABS + AFU + ESP + Double ESP sensor C0: Electronic ABS + AFU + ESP for ACC + CLUSTER C1: Electronic ABS + AFU + ESP for ACC + CLUSTER + CSV D0: Mechanical ABS + AFU E0: Mechanical ABS + AFU + ESP + CLUSTER E1: Mechanical ABS + AFU + ESP + CLUSTER + CSV

Electronic AFU: System equipped with electronic emergency brake assist. Mechanical AFU or ADAM: System equipped with mechanical emergency brake assist. ESP: Electronic stability program. Double ESP sensor: a yaw sensor + a transverse acceleration sensor. CLUSTER (combined sensor): a single sensor combining the yaw sensor and transverse acceleration sensor functions. ACC: Cruise control distance check. CSV: Under-steering control. What is the difference between an ABS system and mechanical or electronic AFU? Electronic AFU has extra elements which do not feature in mechanical AFU, such as: – A brake light cut-off relay. – A brake servo solenoid valve. – A brake potentiometer (brake pedal travel).

Some of the fault finding tool states or parameters will not function, depending on the function code.

74MK60080C1.0

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38

FAULT FINDING - HELP REPLACING THE COMPUTER: After replacing a computer, configure as follows: – Programming the "tachometric index". The TEVES MK 60 ABS computer with the "tachometry button" supplies the vehicle speed signal to all areas in the vehicle where this information is needed (instrument panel, engine management, etc...). This vehicle speed signal replaces the one supplied by the speed sensor located on the gearbox. The ABS computer calculates the vehicle speed from the speed of the wheels and the circumference of the tyres fitted on the vehicle.

The tyre circumference must be programmed into the memory of a new computer. This consists of entering an index X, using the VP007 "TACHOMETRIC INDEX " control on the fault finding tool. Value of index X: All tyre types

X = 64

Except 205/60 R16

X = 119

Once the index has been entered using the Tachometric index command, clear the computer memory and then switch off the ignition. Use the PR030 Tachometric index parameter to check that the index has been entered correctly.

– ABS/ESP calibration: Select command CF077 on the fault finding tool. – Cruise control distance check: Select command CF078 on the fault finding tool. – Gearbox type: Select command CF079 on the fault finding tool. – Vehicle parameters (drive torque index configuration + brake type): Select command CF080 on the fault finding tool. – To program the steering wheel angle: Select command VP003 on the fault finding tool.

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38


ABS/ESP MK 60


FAULT FINDING - INTERPRETATION OF STATES ET017

NOTES

BRAKE PEDAL.

Special notes: Only perform the checks if the depressed and released states are not consistent with the position of the pedal.

STATE/2 Released brake pedal depressed. If brake lights operate: – Check and ensure the continuity of the connection between track A3 of the brake light switch connector and track 41 of the computer connector.

If the brake lights do not operate: – Check the condition and fitting of the brake light switch as well as the brake lights fuse. – Check/ensure the presence of + after ignition feed on tracks A1 and B1 on the brake switch connector. – Remove the brake pedal switch and check that it is operating correctly: Continuity between tracks

Insulation between tracks

Switch pressed (Brake pedal released)

A1 and B3

A3 and B1

Switch released (Brake pedal depressed)

A3 and B1

A1 and B3

– Replace the switch if necessary.

STATE/1 Depressed brake pedal released.

– Check the condition and fitting of the brake light switch as well as the brake lights fuse. – Check/ensure the presence of + after ignition feed on tracks A1 and B1 on the brake switch connector. – Check and ensure insulation against 12 volts of the connection between track A3 of the brake switch connector and track 41 of the computer connector. – Remove the brake pedal switch and check that it is operating correctly: Continuity between tracks

Insulation between tracks

Switch pressed (Brake pedal released)

A1 and B3

A3 and B1

Switch released (Brake pedal depressed)

A3 and B1

A1 and B3

– Replace the switch if necessary.

AFTER REPAIR

Perform a road test and then check with the fault finding tool. 74MK60080C1.0

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FAULT FINDING - INTERPRETATION OF STATES

ESP start/stop button. ET023

NOTES

Special notes: Only perform the checks if the pressed and released states are not consistent with the position of the button.

STATE/1 Button released

Ensure that the ESP start/stop switch connector is in good condition and correctly connected. Repair if necessary. Check there is no continuity between tracks A2 and B1 in the released position of the switch. If there is continuity, replace the switch. Ensure insulation against the earth of the connection between: Switch connector track B1


STATE/2 Button depressed

Ensure that the ESP start/stop switch connector is in good condition and correctly connected. Repair if necessary. Check that there is continuity between tracks A2 and B1 in the pressed position of the switch. If there is no continuity, replace the switch. Ensure the presence of earth on track A2 of the switch connector.

AFTER REPAIR

Perform a road test and then check with the fault finding tool.

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38

FAULT FINDING - CUSTOMER COMPLAINTS

NOTES

Only refer to these customer complaints after a complete check using the fault finding tool.

FAULTS DETECTED ON BRAKING WITH ABS/BRAKING REGULATION Locking of one or more wheels.


Pulling.


Drift.


FAULT FINDING Unexpected ABS operation at low speed with slight pedal pressure. CHART 5 Unexpected ABS operation on poor road surfaces.


Unexpected ABS operation with use of accessories (car phone, CB...)


Extension of brake pedal travel following ABS regulation (with an FAULT FINDING irregular pedal when entering ABS regulation). CHART 8 Spongy pedal.


Brake pedal vibration.


Noises from the pump, the pipes or the hydraulic assembly.


No communication with the ABS computer.


Faulty brake light illumination


OTHER CASES

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FAULT FINDING - FAULT FINDING CHARTS


NOTES

No dialogue with the ABS computer

None

Try to establish dialogue with a computer on another vehicle to make sure that the fault finding tool is not faulty. If the tool is not causing the fault and dialogue cannot be established with another computer on an identical vehicle, it may be that a faulty computer is disrupting diagnostic line K. Disconnect the computers one at a time to locate the fault. Check the voltage of the battery and perform the operations necessary to obtain a voltage which conforms to specification (9.5 volts < battery voltage < 17.5 volts).

Check the presence and condition of the ABS fuses on the passenger compartment fuse board ( 5 A) and 2 in the engine compartment (30A and 40A). Check that the computer connector is properly connected and check the condition of its wiring. Check the ABS earths (good quality, not oxidised, sheath sealing ring (on the earth terminal), tightness of the earth bolt located above the ABS assembly). Check that the computer is correctly supplied:

– Earth on tracks 16 and 47 of the 47-track connector. – + before ignition feed on tracks 1 and 32 of the 47-track connector. – + after ignition feed on track 4 of the 47-track connector.

Check that the diagnostic socket is correctly supplied: – + before ignition feed on track 16. – Earth on track 5. Check and ensure the continuity and insulation of the connections between: Computer connector track 2

track 7 diagnostic socket.

If dialogue is still not established following these various checks, replace the ABS computer.

AFTER REPAIR


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38



NOTES

Locking of one or more wheels

Only follow up this customer complaint after a complete check using the fault finding tool.

Reminder: The locking of wheels on a vehicle fitted with ABS, or grating of the tyres, which feels like locking to the customer, may be linked to normal operation of the system and should not always be considered as a fault: – Locking is allowed below 3.75 mph (6 km/h) (the system will not provide regulation). – Braking with ABS regulation on very poor roads (significant grating).

However, if the wheels are actually locking, lift the vehicle in order to be able to turn the wheels and check: – for possible reversal of the speed sensor connection. Using parameters PR001, PR002, PR003 and PR004 , turn the relevant wheels slowly and check the consistency of the results obtained. If the value measured is zero, turn the other wheels to confirm an electronic reversal of the sensors and repair the wiring. – for possible reversal of the pipes on the hydraulic assembly. Use the "Front left wheel solenoid valves", "Front right wheel solenoid valves", "Rear left wheel solenoid valves" and "Rear right wheel solenoid valves" commands while depressing the brake pedal and check for the occurrence of ten locking/unlocking cycles on the relevant wheel (see the "Help" section). If the ten cycles do not occur on the wheel tested (wheel remains locked), see if they occur on another wheel (if a reversal is confirmed: repair). If the ten cycles do not occur on a wheel and the pipes are correctly connected, replace the hydraulic assembly. Check that the sensor holder does not rotate. Check that the wheel speed sensors mounting is in good condition (clipping). Check the conformity of the target: condition, number of teeth = 48 (using the "teeth target check" command). If the fault persists following these checks, replace the hydraulic assembly.

AFTER REPAIR

Perform a road test followed by a test using the fault finding tool.

74MK60080C1.0

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Pulling


NOTES

Disconnect one wheel speed sensor. Start the engine and ensure that only the ABS fault warning light comes on. Do not drive the vehicle if the brake fault warning light also lights up, as the brake limiter function is no longer assured. Perform a road test with the ABS thus out of service.

Does the fault persist under these conditions?

yes

no

If the brake pedal travel is relatively long, bleed the brake circuit. If the travel is normal, check the tyre pressures, the front axle, or for any leaks in the circuit.

Lift the vehicle so that you can turn the wheels and check: – for possible reversal of the speed sensor connection. – for possible reversal of the pipes on the hydraulic assembly. To perform these tests, refer to and apply the methods defined in FAULT FINDING CHART 2. Check the condition of the ABS targets and that they conform to specifications. Also check the sensor/target air gap by rotating each front and rear wheel one revolution. If the fault persists, replace the hydraulic assembly.

AFTER REPAIR


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NOTES

Drift


Disconnect one wheel speed sensor. Start the engine and ensure that only the ABS fault warning light comes on. Do not drive the vehicle if the brake fault warning light also lights up, as the brake limiter function is no longer assured. Perform a road test with the ABS thus out of service.

Does the fault persist under these conditions?

yes

no

Road handling fault not connected with the ABS. Check the condition of the brake linings and that they are to specification and check the tyre pressures, the front axle, etc...

Normal behaviour linked to the operation of the system during the regulation phase in particular on surfaces with uneven grip or which are poorly coated.

AFTER REPAIR

Perform a road test followed by a test using the fault finding tool. 74MK60080C1.0

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ABS/ESP MK 60


38



NOTES

Unexpected ABS operation at low speed and with slight pedal pressure

Only follow up this customer complaint after a complete check using the fault finding tool. Warning: ABS regulation may be unresponsive when the vehicle is driven on surfaces such as icy roads, cobbled streets, etc.

It is possible to feel brake pedal vibrations which are linked to the reaction of the system in particular circumstances, such as: – Crossing speed bumps. – Tight cornering with lifting of the inside rear wheel. These vibrations may be associated with the simple activation of the brake limiter when pressure on the rear axle is limited. If the problem is different, check the speed sensor connectors (micro-breaks) as well as the targets.

AFTER REPAIR


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NOTES

Unexpected ABS operation on a poor road surface


On poor road surfaces it is normal to feel bucking and vibration of the pedal as well as grating which is more significant than on good surfaces. The result is the impression of a variation in efficiency which should be considered normal.

AFTER REPAIR


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NOTES

Unexpected ABS operation with use of accessories (car phone, CB, ...)


Check that the equipment which is causing the problem is approved. Check that the equipment has been correctly installed with no alteration to the original wiring, in particular the ABS wiring (unauthorised connections to earth and +after ignition feed/before ignition feed of the ABS).

AFTER REPAIR


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NOTES

Extension of brake pedal travel following ABS regulation (with an irregular pedal when entering ABS regulation phase)


Passage of air from the hydraulic assembly regulation channels to the brake circuits. Bleed the circuits in accordance with the procedure recommended in the Workshop Repair Manual (use the command modes on the fault finding tool). Following the operation, perform a road test with ABS regulation.

If the fault persists, perform the above operation once or twice more. If the customer complaint is particularly serious, and bleeding the circuit does not improve matters, replace the hydraulic assembly.

AFTER REPAIR


74MK60080C1.0

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NOTES

Spongy pedal


Air in the brake circuits. Bleed the circuits in the conventional way starting with the rear right brake, followed by rear left, front left and finally front right. Repeat the operation if necessary.

AFTER REPAIR


74MK60080C1.0

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NOTES

Brake pedal vibration


Normal reaction of the brake pedal during ABS regulation or of limitation of pressure on the rear axle (brake limiter function).

AFTER REPAIR


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NOTES

Noise from the pump, the pipes or the hydraulic assembly


– Vibration of the assembly: check the presence and the condition of the assembly bracket insulating rubber mounting fittings. – Vibration of the pipes: check that all the pipes are correctly fitted in their mounting clips and that there is no contact between the pipes or between the pipes and the bodywork. The "Front left wheel solenoid valves", "Front right wheel solenoid valves", "Rear left wheel solenoid valves" and "Rear right wheel solenoid valves" solenoid valve control commands may be used while pressing the brake pedal to determine where the noise is coming from.

AFTER REPAIR


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NOTES

Faulty brake light illumination


Using the fault finding tool, check that ET017 is functioning correctly. If not, apply the fault finding strategy described above for ET017.

Using the fault finding tool, check that the FUNCTION CODE NUMBER (CLIP: identification screen and NXR: parameter screen PR041) is: A0 or B0. – If the FUNCTION CODE NUMBER is not A0 or B0, check the continuity and insulation of the connection between track A3 of the brake light switch connector and the brake lights. – Also check the presence of earths on the rear lens units.

If the FUNCTION CODE NUMBER is A0 or B0, disconnect the 47-track ABS computer connector and check that the connections are in good condition. – Switch on the ignition and check that the brake lights are functioning correctly. If the lights are functioning correctly, replace the ABS/ESP computer.

– Check the presence of + after ignition feed on track C1 on the relay mounting. – Check the presence of + after ignition feed on track 35 of the 47-track connector on the wiring loom side. If the measured voltage is incorrect, check the continuity and insulation against the earth of the connection between track 35 of the computer connector and track C2 of the brake light cut-off relay. If the results of the checks are correct, replace the brake light cut-off relay.

– Check the continuity and insulation of the connection between track C4 of the relay mounting and the brake lights. – Also check the presence of earths on the rear lens units.

AFTER REPAIR


74MK60080C1.0

38-75

n.t. 3523a Xg0x

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