Codigos de Falla de Diagnostico

Diagnostic Trouble Codes

Group 20

Diagnostic Trouble Codes 522157-2 522155-2

TSP Speed Sensor Senso r Direction or Direction Check Logical Failure Digital Inputs for Inputs for Direction and Direction Check Signals are Inverted to Each Other for the Direction Selected

CODES DTC 522155-2 - TOSS Sensor Direction or Direction Check Input Failure (TCU) DTC 522157-2 - TISS Sensor Direction or Direction Check Input Failure (TCU)

POSSIBLE CAUSE A. DIRECTION SIGNAL/DIRECTION CHECK SIGNAL OPEN B. DIRECTION SIGNAL/DIRECTION CHECK SIGNAL SHORT TO SPEED SIGNAL C. DIRECTION SIGNAL/DIRECTION CHECK SIGNAL SHORT TO BATTERY (+) D. DIRECTION SIGNAL/DIRECTION CHECK SIGNAL SHORT TO IGN3 E. DIRECTION SIGNAL/DIRECTION CHECK SIGNAL SHORT TO (+) F. DIRECTION SIGNAL/DIRECTION CHECK SIGNAL SHORT TO BATTERY – /FRAME GROUND G. SENSOR FAILURE FAILURE H. FUNCTIONAL FAILURE IN CONTROLLER

NOTE Please refer to the end of this procedure for supporting diagrams.

COMPONENT OPERATIONAL CHECK PROCEDURE OR ACTION: 1. Turn powe powerr to to OFF for no less than 30 seconds, and then to ON to clear displayed DTC. Does reported DTC reoccur? 2. YES: Go to Step 2. 2.

NO: Problem not verified. Resume operation. operation. Conduct Conduct a quick visual inspection inspection of all connectors/wirin connectors/wiring g associated associated with the displayed displayed fault fault code. Are any faults detected/observed? YES: Repair/replace connector or wiring associated with faults found. See Electrical System 2200 SRM 1142. to Cause A. A. NO: Go to Cause

CAUSE A - DIRECTION SIGNAL/DIRECTION CHECK SIGNAL OPEN PROCEDURE OR ACTION: ACTI ON: 1. Ensure Ensure truck truck powe power is OFF . T CU connector is connected and tightened. NOTE: Ensure the TCU 2. Discon Disconnec nectt indic indicated ated sensor connector. e. Verify DMM zero reading. reading. 3. Set Set DMM DMM to to ohm ohms s scal scale. procedure for probing the connector connector,, measure resistance resistance between between direction direction sensor sensor 4. At sensor sensor connec connecttor, using procedure signal pin and sensor sen sor signal ground.

Is resistance resistance approximately approximately 27 kOhms? 5. YES: Go to Step 5. repair/replace open wire/connection wire/connection.. See direction sensor signal wire has an open circuit. Locate and repair/replace NO: The direction sensor 2200 SRM 1128. Wire Harness Repair Repair 2200 5. At sens sensor or conn connec ectt or, using procedure for probing the connector, measure resistance between direction check sensor signal pin and sensor signal ground.

Check the Service Manual section in Hypass Online for possible updates and check pertinent Grams

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TSP Speed Sensor Direction or Direction Check Logical Failure (Cont) Is resistance approximately 27 kOhms? YES: Go to Step 6.

6.

NO: The direction check sensor signal wire has an open circuit. Locate and repair/replace open wire/connection. See Wire Harness Repair 2200 SRM 1128. At sensor connector, using procedure for probing the connector, measure resistance between speed sensor pin and sensor signal ground. Is resistance approximately 27 kOhms? YES: Go to Cause B. NO: The speed sensor pin wire has an open circuit. Locate and repair/replace open wire/connection. See Wire Harness Repair 2200 SRM 1128.

CAUSE B - DIRECTION SIGNAL/DIRECTION CHECK SIGNAL SHORT TO SPEED SIGNAL PROCEDURE OR ACTION: 1. Ensure truck power is OFF. NOTE: Ensure the TCU connector is connected and tightened. 2. Disconnect indicated sensor connector. 3. Set DMM to ohms scale. Verify DMM zero reading. 4. At sensor connector, using procedure for probing the connector, measure resistance between direction sensor signal pin and speed sensor signal pin. Is resistance approximately 0.5 Ohms? YES: The direction sensor signal wire is shorted to speed sensor signal wire. Locate and repair/replace open wire/connection. See Wire Harness Repair 2200 SRM 1128. 5.

NO: Go to Step 5. At sensor connector, using procedure for probing the connector, measure resistance between direction check sensor signal pin and speed sensor signal pin. Is resistance approximately 0.5 Ohms? YES: The direction check sensor signal wire is shorted to speed sensor signal wire. Locate and repair/replace open wire/connection. See Wire Harness Repair 2200 SRM 1128.

6.

NO: Go to Step 6. At sensor connector, using procedure for probing the connector, measure resistance between speed sensor pin and speed sensor signal pin. Is resistance approximately 0.5 Ohms? YES: Go to Cause C. NO: The speed sensor pin wire is shorted t o speed sensor signal wire. Locate and repair/replace open wire/ connection. See Wire Harness Repair 2200 SRM 1128.

CAUSE C - DIRECTION SIGNAL/DIRECTION CHECK SIGNAL SHORT TO BATTERY (+) PROCEDURE OR ACTION: 1. Ensure truck power is OFF. NOTE: Ensure the TCU connector is connected and tightened. 2. Disconnect indicated connector from sensor. 3. Set DMM to volts scale. 4. At sensor connector, using procedure for probing the connector, measure voltage between direction sensor signal pin and sensor signal ground or ( ) battery terminal.


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TSP Speed Sensor Direction or Direction Check Logical Failure (Cont) Is voltage approximately 12 Vdc? YES: Direction sensor signal wire is shorted to (+) battery. Refer to Diagrams and Schematics 8000 SRM 1152 to determine possible source. Locate and repair/replace shorted wire/connection. See Wire Harness Repair 2200 SRM 1128. 5.

NO: Go to Step 5. At sensor connector, using procedure for probing the connector, measure voltage between direction check sensor signal pin and sensor signal ground or ( ) battery terminal. Is voltage approximately 12 Vdc? YES: Direction check sensor signal wire is shorted to (+) battery. Refer to Diagrams and Schematics 8000 SRM 1152 to determine possible source. Locate and repair/replace shorted wire/connection. See Wire Harness Repair 2200 SRM 1128.

6.

NO: Go to Step 6. At sensor connector, using procedure for probing the connector, measure resistance between speed sensor pin and speed sensor signal pin. Is voltage approximately 12 Vdc? YES: The speed sensor pin wire is shorted to speed sensor signal wire. Locate and repair/replace open wire/ connection. See Wire Harness Repair 2200 SRM 1128. NO: Go to Cause D.

CAUSE D - DIRECTION SIGNAL/DIRECTION CHECK SIGNAL SHORT TO IGN3 PROCEDURE OR ACTION: 1. Ensure truck power is OFF . NOTE: Ensure the TCU connector is connected and tightened. 2. Disconnect indicated connector from sensor. 3. Set DMM to volts scale. 4. At sensor connector, using procedure for probing the connector, measure voltage between direction sensor signal pin and sensor signal ground or ( ) battery terminal. Is voltage approximately 12 Vdc? YES: Direction sensor signal wire is shorted to (+) battery. Refer to Diagrams and Schematics 8000 SRM 1152 to determine possible source. Locate and repair/replace shorted wire/connection. See Wire Harness Repair 2200 SRM 1128. 5.


6.

NO: Go to Step 6. At sensor connector, using procedure for probing the connector, measure resistance between speed sensor pin and speed sensor signal pin. Is voltage approximately 12 Vdc? YES: The speed sensor pin wire is shorted to speed sensor signal wire. Locate and repair/replace open wire/ connection. See Wire Harness Repair 2200 SRM 1128. NO: Go to Cause E.


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TSP Speed Sensor Direction or Direction Check Logical Failure (Cont) CAUSE E - DIRECTION SIGNAL/DIRECTION CHECK SIGNAL SHORT TO (+) PROCEDURE OR ACTION: 1. Ensure truck power is OFF. NOTE: Ensure the TCU connector is connected and tightened. 2. Disconnect indicated connector from sensor. 3. Set DMM to volts scale. 4. At sensor connector, using procedure for probing the connector, measure voltage between direction sensor signal pin and sensor signal ground or ( ) battery terminal. Is voltage approximately 12 Vdc? YES: Direction sensor signal wire is shorted to (+) battery. Refer to Diagrams and Schematics 8000 SRM 1152 to determine possible source. Locate and repair/replace shorted wire/connection. See Wire Harness Repair 2200 SRM 1128. 5.


6.

NO: Go to Step 6. At sensor connector, using procedure for probing the connector, measure resistance between speed sensor pin and speed sensor signal pin. Is voltage approximately 12 Vdc? YES: The speed sensor pin wire is shorted to speed sensor signal wire. Locate and repair/replace open wire/ connection. See Wire Harness Repair 2200 SRM 1128. NO: Go to Cause F.

CAUSE F - DIRECTION SIGNAL/DIRECTION CHECK SIGNAL SHORT TO BATTERY – /FRAME GROUND PROCEDURE OR ACTION: 1. Ensure truck power is OFF. 2. Disconnect indicated TCU and sensor connector. 3. Set DMM to ohms scale. Verify DMM zero reading. 4. At sensor connector, using procedure for probing the connector, measure resistance between direction sensor signal pin (+) and ( ) battery ground on truck. Is resistance less than 0.5 ohms? YES: The direction sensor signal wire is shorted to ( ) battery ground or frame. Locate and repair/replace open wire/connection. See Wire Harness Repair 2200 SRM 1128. 5.

NO: Go to Step 5. At sensor connector, using procedure for probing the connector, measure resistance between direction check sensor signal pin (+) and ( ) battery ground on truck. Is resistance less than 0.5 ohms? YES: The direction check sensor signal wire is shorted to ( ) battery ground or frame. Locate and repair/replace open wire/connection. See Wire Harness Repair 2200 SRM 1128.

6.

NO: Go to Step 6. At sensor connector, using procedure for probing the connector, measure resistance between speed sensor signal pin (+) and ( ) battery ground on truck.


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TSP Speed Sensor Direction or Direction Check Logical Failure (Cont) Is resistance less than 0.5 ohms? YES: The speed sensor signal wire is shorted to ( ) battery ground or frame. Locate and repair/replace open wire/connection. See Wire Harness Repair 2200 SRM 1128. NO: Go to Cause G. CAUSE G - SENSOR FAILURE PROCEDURE OR ACTION: 1. Ensure truck power is OFF . NOTE: A speed sensor failure will derate the transmission to Limp Home mode. If truck will not drive, go to Lift Truck Does Not Move In One or Both Directions (Transmission) and examine for a mechanical failure. 2. Replace sensor. NOTE: Do not discard original sensor after removal. 3. Ensure that all connections are completely inserted. 4. Turn truck power ON . Does reported DTC reoccur? YES: Reinstall original sensor and go to Cause H. See Electrical System 2200 SRM 1142. NO: Problem has been corrected. Resume operation. Discard faulty sensor. CAUSE H - FUNCTIONAL FAILURE IN CONTROLLER PROCEDURE OR ACTION: 1. Ensure all previous procedures have been completed. 2. Ensure truck power is OFF . 3. Ensure that all connections to the controller are completely inserted. 4. Ensure truck power is OFF for no less than 30 seconds, and then to ON to clear displayed DTC. Does reported DT C reoccur? YES: Go to Step 5. 5. 6. 7. 8.

NO: Problem corr ected. Resume operation. At the DSC, press ENTER to access Main Menu. Scroll to VIEW VERSIONS, press ENTER. Scroll to TRUCK SERIAL NUMBER, press ENTER. View the TRUCK SERIAL NUMBER on the display. Does the truck serial number on display match serial number on truck nameplate (VSM Only)? YES: Go to Step 9.

NO: Controller has been substituted from another truck. Replace VSM with VSM that has the correct truck serial number or obtain new VSM with correct Serial number/ CDF. See Electrical System 2200 SRM 1142. 9. Resident Service Approval Required prior to VSM replacement for Trucks under warranty. Make sure to indicate the DTC code(s) on the warranty claim and include an accurate problem description leading to the controller replacement. 10. For other controllers, Replace indicated controller. (ECU-ECM/GCU/TCU). See Electrical System 2200 SRM 1142. For GM 4.3L LPG engines, see LPG Fuel System, GM 4.3L Engine 900 SRM 1242. For GM 4.3L gasoline engines, see Gasoline Fuel System, GM 4.3L Engine 900 SRM 1244 for all controllers. 11. Reinstall all removed components and ensure that all connectors are completely inserted. 12. Repeat Component Operational Check. END POSSIBLE CAUSES DIAGRAMS


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TSP Speed Sensor Direction or Direction Check Logical Failure (Cont)

WIRE # 128 (DK GRN) = SENSOR RETURN WIRE # 210 (RED) = SENSOR SUPPLY WIRE # 549 (WHITE) = SENSOR SIGNAL WIRE # 550 (WHITE) = SENSOR SIGNAL WIRE # 551 (WHITE) = SENSOR SIGNAL

TISS Transmission Input Shaft Speed


TOSS Transmission Output Shaft Speed


TOSS Transmission Output Shaft Speed Check the Service Manual section in Hypass Online for possible updates and check pertinent Grams

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TSP Speed Sensor Direction or Direction Check Logical Failure (Cont) CONNECTOR(S)

Turbine Speed CPS 134 Connector

APC 214-CPS 128 Connector

Output Speed CPS 135 Connector

APC 214-CPS 129 Connector END FAULT


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Codigos de Falla de Diagnostico

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