C7

CYLINDER AND VALVE LOCATION INLET VALVES

6

EXHAUST VALVES

5

FIRING ORDER 1 5 3 6 2 4

4

BORE 112 MM (4.4 IN) STROKE 149 MM (5.9 IN)

3

2

1

AIR INTAKE AND EXHAUST SYSTEM

EXHAUST MANIFOLD

EXHAUST VALVE

INTAKE HEATER

INLET VALVE

AIR TO AIR AFTERCOOLER

AIR INLET

EXHAUST OUTLET TURBOCHARGER

COMPRESSOR TURBINE SIDE SIDE

TURBOCHARGER OIL BEARING TURBINE TURBINE INLET HOUSING WHEEL PORT

COMPRESSOR HOUSING

EXHAUST OUTLET

AIR INLET

COMPRESSOR WHEEL

BEARING

OIL OUTLET PORT

EXHAUST INLET

VALVE SYSTEM COMPONENTS ROCKER ARM PUSH ROD BRIDGE

SPRING

VALVE

LIFTER

C-9 LUBRICATION SYSTEM

HEUI PUMP

TO TURBOCHARGER

OIL COOLER OIL FILTER

COOLING SYSTEM EXPANSION TANK WATER TEMPERATURE REGULATOR HOUSING CYLINDER HEAD

BYPASS HOSE

CYLINDER BLOCK

OIL COOLER

WATER PUMP

RADIATOR

CRANKSHAFT OIL FLOW OIL GALLERY

MAIN BEARINGS (7) 7

5

6 6

5

3

4 4

3

ROD BEARINGS (6)

2 2

1 1

VISCOUS VIBRATION DAMPER CRANKSHAFT

WEIGHT

CASE

C-9 HEUI SYSTEM POWER SUPPLIES • • • • • • •

ECM Injectors and Compression Brake Pump Control Valve Analog Sensors Digital Sensors Air Intake Heater Service Tool

J2

J1

ECM GROUND BOLT

6 DRIVERS

DISCONNECT SWITCH 3 RETURNS ENGINE RETARDER SOLENOIDS TIMING CALIBRATION CONNECTOR

24 V

20 AMP FUSE 20 AMP BREAKER MAIN POWER RELAY

KEY START SWITCH

CRANK WITHOUT INJECT PLUG

ECM POWER SUPPLY CIRCUIT BATTERY

ENGINE BLOCK GROUND BOLT (-)

24 VOLTS DC (+)

20 A DISCONNECT SWITCH

FUSE

P1 J1

61 63 65 48 52 53 70

(-) (-) (-) (+) (+) (+) (+)

ECM (C-9) BATTERY BATTERY BATTERY BATTERY BATTERY BATTERY SWITCHED POWER

WIRE FUNCTION COLOR CODE (+) BATTERY SUPPLY WIRES INPUT SIGNAL WIRES TO ECM

R

OUTPUT SIGNAL WIRES FROM ECM SENSOR SUPPLY VOLTAGE SIGNAL PLUS SIGNAL MINUS (-) BATTERY / SENSOR RETURN

15 AMP CIRCUIT BREAKER

C OFF S ON B ST KEY SWITCH

ECM CONNECTOR (P1)

1

2

3

4

5

6

8

9

10

11 12 13

13

1

23

14

31

24

39

32

47

40

40

47

57

48

48

57

70

58

14

31

24 36

58 59 60 61 62

ECM SIDE

23

>PEI<

63

65 66 67 68 69 70

HARNESS SIDE

INJECTOR AND COMPRESSION BRAKE SOLENOID CIRCUITS 2 1 BRAKE SOLENOID CYL. 1

J301 P301 1 2

2 1 BRAKE SOLENOID CYL. 2 J302 P302 1 2



INJECTOR SOLENOID CYL. 1




INJECTOR SOLENOID CYL. 3 INJECTOR SOLENOID CYL. 4



12 1 18 11 2 17 10 3 16 9 4 15 8 5 14 7 6 13 P300 J300

BRAKE RETURN CYL 1 INJECTOR/BRAKE CYL 1 INJECTOR RETURN CYL 1 BRAKE RETURN CYL 2 INJECTOR/BRAKE CYL 2 INJECTOR RETURN CYL 2 BRAKE RETURN CYL 3 INJECTOR/BRAKE CYL 3 INJECTOR RETURN CYL 3 BRAKE RETURN CYL 4 INJECTOR/BRAKE CYL 4 INJECTOR RETURN CYL 4 BRAKE RETURN CYL 5 INJECTOR/BRAKE CYL 5 INJECTOR RETURN CYL 5 BRAKE RETURN CYL 6 INJECTOR/BRAKE CYL 6 INJECTOR RETURN CYL 6

20 36 44 21 37 45 28 38 46 29 39 47 65 54 67 66 55 68 P2

J2

ECM

PUMP CONTROL VALVE POWER SUPPLY PUMP CONTROL VALVE SUPPLY RETURN

J500 P500 A B

P2 J2 61 62

ECM (C-9 HEUI) + CONTROL VALVE - CONTROL VALVE

TURBO OUTLET PRESSURE SIGNAL ANALOG SENSOR RETURN 3 ANALOG SENSOR POWER (+5V) 3

J200/P200 C B A

HYDRAULIC OIL PRESSURE SIGNAL ANALOG SENSOR RETURN 1 ANALOG SENSOR POWER (+5V) 1

J204/P204 C B A

ATMOSPHERIC PRESSURE SIGNAL ANALOG SENSOR RETURN 1 ANALOG SENSOR POWER (+5V) 1

J203/P203 C B A

FUEL PRESSURE SIGNAL ANALOG SENSOR RETURN 1 ANALOG SENSOR POWER (+5V) 1

J209/P209 C B A

ENGINE OIL PRESSURE SIGNAL ANALOG SENSOR RETURN 3 ANALOG SENSOR POWER (+5V) 3

J201/P201 C B A

ANALOG SENSOR POWER SUPPLY CIRCUIT 5 ± 0.5 VOLTS P2 J2

ECM

40 27

TURBO OUTLET PRESSURE SIGNAL HYDRAULIC OIL PRESSURE SIGNAL

14 3 2

ATMOSPHERIC PRESSURE SIGNAL ANALOG SENSOR RETURN 1 ANALOG SENSOR POWER (+5V) 1

18

FUEL PRESSURE SIGNAL

24 42 41

ENGINE OIL PRESSURE SIGNAL ANALOG SENSOR RETURN 3 ANALOG SENSOR POWER (+5V) 3

THROTTLE POSITION SENSOR

J405 P405

+V DIGITAL DIGITAL RETURN SIGNAL

A B C

4 5

ECM (C-9 HEUI) + V DIGITAL SUPPLY - V DIGITAL RETURN

DIGITAL SENSOR POWER SUPPLY CIRCUIT

FAN SPEED SENSOR +V DIGITAL DIGITAL RETURN SIGNAL

P1 J1

A B C

8 ± 0.5 VOLTS

AIR INTAKE HEATER CIRCUIT AIR INTAKE HEATER LAMP

24V

B A

J648 P648

AIR INTAKE HEATER

AIR INTAKE HEATER RELAY

J501/P501 1 2

850-BU

ECM J2/P2 AIR INTAKE 12 HEATER RELAY

TYPICAL SERVICE TOOL POWER SUPPLY CIRCUIT CATERPILLAR MONITORING SYSTEM

TRANSMISSION ECM R OFF C ON S ST B

KEY SWITCH

CAT DATA LINK + CAT DATA LINK -

8 7

J63

A B C D E F G

SERVICE TOOL CONNECTOR

DATA LINKS

8 7


ENGINE ECM

P1 J1 70 65

BAT + (SWITCHED) BAT -

8 9 34 50

CAT DATA LINK + CAT DATA LINK CAN DATA LINK CAN DATA LINK +

ELECTRONIC CONTROL SYSTEM

HEUI INJECTOR TESTING METHODS • Injector Solenoid Test • Manual Cylinder Cutout • Automatic Cylinder Cutout Test

C-9 HEUI CONTROL LOGIC TIMING CONTROL ENGINE SPEED FUEL QUANTITY HYDRAULIC OIL TEMPERATURE

TIMING

DEGREES BTDC

FUEL RPM SELECT TIMING

DESIRED TIMING BTDC

CONVERT DESIRED TIMING

FUEL INJECTION TIMING WAVE FORM

C-9 ELECTRONIC GOVERNOR

HYDRAULIC OIL TEMPERATURE AND PRESSURE SENSORS

SHUTDOWNS

ECM TO PUMP CONTROL VALVE

ELECTRONIC GOVERNOR

6 5 SIGNALS 4 TO FUEL 3 INJECTORS 2 1 SPEED/TIMING SIGNAL

FUEL INJECTION CONTROL

ENGINE RPM

TORQUE MAPS

ENGINE CONTROL LOGIC

THROTTLE

TDC ENGINE RPM

ENGINE RPM SPEED/TIMING SENSORS

TIMING WHEEL

AFRC MAPS

TURBO OUTLET AND ATMOSPHERIC PRESSURE SENSORS

C-9 SPEED/TIMING SENSORS UPPER (HIGH SPEED) SPEED/TIMING SENSOR

J401/P401 1 2

LOWER (CRANKING) SPEED/TIMING SENSOR

J2/P2

ECM

49 48

- UPPER S/T SENSOR + UPPER S/T SENSOR

1 2

59 58

- LOWER S/T/ SENSOR + LOWER S/T SENSOR

1 2

22 23

+ TIMING CAL PROBE - TIMING CAL PROBE

J402/P402

SPEED/TIMING SENSING DUAL PASSIVE SENSORS

GEAR TRAIN SHOWN FROM FRONT OF ENGINE

45° CRANK UPPER SPEED/TIMING SENSOR A (75 TO 230 OHMS)

LOWER SPEED/TIMING SENSOR B (600 TO 1800 OHMS)

SENSOR A MEASURED TDC NO.1

CAMSHAFT IDLER GEAR

45° CRANK

SENSOR B MEASURED TDC NO.1

LOWER SENSOR LOW SPEED

UPPER SENSOR HIGH SPEED 30° CRANK

15° CRANK CRANKSHAFT GEAR

GEAR ROTATION SENSOR B TDC NO.1

SENSOR A TDC NO.1

SENSOR B TDC NO.5

SENSOR A TDC NO.5

SENSOR SIGNALS

UPPER SENSOR A TIMING

-90°

-60°

-30°

0°

30°

45°

LOWER SENSOR B TIMING -70°

-45°

-15° -0°

15°

45°

75°

90° 105°

60°

90°

C-9 TIMING CALIBRATION PROBE INSTALLATION TDC POSITION CRANKSHAFT COUNTERWEIGHT

MACHINED FACE

DIRECTION OF ROTATION TIMING CALIBRATION PROBE POSITIONED 85 CRANKSHAFT DEG. AFTER TDC TIMING CALIBRATION SLOT

ENGINE BLOCK (SHOWN FROM REAR) AIR GAP 1 mm (.040 in)

C-9 TIMING CALIBRATION TIMING WHEEL

REFERENCE EDGE TO TDC DISTANCE REFERENCE EDGE

ASSUMED CYL. NO. 1 TDC

-3° TIMING CALIBRATION SENSOR SIGNAL

25 ENGINE DEGREES

ACTUAL CYL. NO. 1 TDC

+3° TIMING REFERENCE OFFSET (MAXIMUM RANGE ± 3 DEGREES)

C-9 SPEED/TIMING SENSORS CALIBRATION UPPER (HIGH SPEED) SPEED/TIMING SENSOR

J401/P401 1 2

LOWER (CRANKING) SPEED/TIMING SENSOR

J2/P2

ECM

49 48

- UPPER S/T SENSOR + UPPER S/T SENSOR

59 58

- LOWER S/T/ SENSOR + LOWER S/T SENSOR

22 23

+ TIMING CAL PROBE - TIMING CAL PROBE

J402/P402 1 2

TIMING CALIBRATION PROBE

J400/P400 1 2

TIMING CALIBRATION CONNECTOR

ELECTRONIC SENSORS AND SYSTEMS

ECM 6 INJECTOR SOLENOIDS

6 COMPRESSION BRAKE SOLENOIDS

J2

J1




J2

J1




ENGINE SPEED/TIMING SENSORS

J2

J1

ANALOG SENSORS • Hydraulic oil temperature • Lubrication oil pressure • Air intake temperature • Atmospheric pressure • Hydraulic oil pressure • Turbocharger outlet pressure • Coolant temperature





COOLANT TEMP. SENSOR

J2

J1






AIR INTAKE TEMP. SENSOR

J2

J1





COOLANT TEMP. SENSOR AIR INTAKE TEMP. SENSOR ATMOSPHERIC PRESSURE SENSOR

J2

J1

ENGINE POWER DERATING MAP 100%

7,500

98%

8,210

96%

8,920

94%

9,630

92%

10,340

90%

11,050

88%

11,760

86%

12,470

84%

13,180

82%

13,890

80%

14,600

78%

15,310

76%

16,020

74%

16,730

72%

17,440 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53

ATMOSPHERIC PRESSURE IN kPa

ALTITUDE IN FEET

PERCENT OF FULL LOAD POWER

ACCORDING TO ATMOSPHERIC PRESSURE





COOLANT TEMP. SENSOR AIR INTAKE TEMP. SENSOR

ATMOSPHERIC PRESSURE SENSOR

TURBO OUTLET PRESSURE SENSOR (BOOST)

J2

J1






AIR INTAKE TEMP. SENSOR

ATMOSPHERIC PRESSURE SENSOR

TURBO OUTLET PRESSURE SENSOR

ENGINE OIL PRESSURE SENSOR

J2

J1

OIL PRESSURE MAP OIL PRESSURE WARNING AND DERATE TRIP POINTS 190

27.6

180

26.1

175 kPa (25 psi) RESET LINE

170

24.7

160

23.2

150

154 kPa (22 psi) TRIP LINE

20.3

130

18.9

125 kPa (18 psi) RESET LINE

120

17.4

110

16.0

100

14.5

104 kPa (15 psi) TRIP LINE

90

13.1

80

11.6

70

10.2

60

8.7

LOW OIL PRESSURE WARNING

7.3

50

VERY LOW OIL PRESSURE DERATE

40

5.8

30

4.4

20

2.9

10

1.5

0

0

400

500

600

kPa x 0.145 = PSI

700

800

900

1000

1100

1200

1300

ENGINE RPM

1400

1500

1600

1700

1800

1900

2000

2200

OIL PRESSURE IN PSI

OIL PRESSURE IN kPa

140

21.8


6 COMPRESSION BRAKE SOLENOIDS TIMING CALIBRATION CONNECTOR


COOLANT TEMP. SENSOR AIR INTAKE TEMP. SENSOR

ATMOSPHERIC PRESSURE SENSOR TURBO OUTLET PRESSURE SENSOR ENGINE OIL PRESSURE SENSOR

FUEL PRESSURE SENSOR

J2

J1



ENGINE SPEED/TIMING SENSORS COOLANT TEMP. SENSOR AIR INTAKE TEMP. SENSOR ATMOSPHERIC PRESSURE SENSOR ENGINE OIL PRESSURE SENSOR

FUEL PRESSURE SENSOR

HYDRAULIC OIL TEMP. SENSORS

OIL VISCOSITY SELECTION CONNECTOR

J2

J1



ENGINE SPEED/TIMING SENSORS COOLANT TEMP. SENSOR AIR INTAKE TEMP. SENSOR ATMOSPHERIC PRESSURE SENSOR

ENGINE OIL PRESSURE SENSOR FUEL PRESSURE SENSOR

HYDRAULIC OIL TEMP. SENSORS

HYDRAULIC OIL PRESS. SENSOR

J2

J1

DIGITAL SENSORS AND CIRCUITS • Throttle Position Sensor • Fan Speed Sensor

J2

J1

ECM

GROUND BOLT

DISCONNECT SWITCH

24 V 20 AMP FUSE 20 AMP BREAKER MAIN POWER RELAY

KEYSWITCH

PULSE WIDTH MODULATED SIGNALS 10%

LOW IDLE 0% THROTTLE

ON DUTY = 10% CYCLE OFF 50%

MID RANGE SPEED 50% THROTTLE

ON DUTY = 50% CYCLE OFF 1 CYCLE 90%

FULL SPEED / HIGH IDLE 100% THROTTLE

ON DUTY = 90% CYCLE OFF DUTY CYCLE = PERCENT OF TIME ON VS PERCENT OF TIME OFF

GROUND LEVEL SHUTDOWN SWITCH CIRCUIT GROUND LEVEL SHUTDOWN SWITCH 1 2 3

P1 J1 2 8 29

ECM GND. LEVEL SHUTDOWN (NO) GND. LEVEL SHUTDOWN (NC) DIGITAL RETURN

USER DEFINED SHUTDOWN CIRCUIT

P1 J1 USER SHUTDOWN DEVICE

59 5

ECM USER DEFINED SHUTDOWN DIGITAL RETURN

AIR INTAKE HEATER CIRCUIT AIR INTAKE HEATER LAMP

24V B A

J648 P648

AIR INTAKE HEATER

AIR INTAKE HEATER RELAY

J501/P501 1 2

850-BU

ECM J2/P2 AIR INTAKE 12 HEATER RELAY

CAT DATA LINK UNIVERSAL DATA LINK CABLE (2 FT.)

J2

SERIAL CABLE (25 FT.)

J1

ENGINE ELECTRONIC CONTROL MODULE (ECM)

PC SERIAL PORT (COMM PORT)

SERVICE TOOL CONNECTOR

COMMUNICATION ADAPTER II 171-4400 (GP)

CAT ELECTRONIC TECHNICIAN

LAPTOP COMPUTER

P

15

TRANSMISSION ELECTRONIC CONTROL MODULE

10 5

25 X100

R 24 V

AUT

20

0

MPH km/h

30

CATERPILLAR MONITORING SYSTEM DISPLAY UNIT

44

TYPICAL CAT / CAN DATA LINK CIRCUIT CATERPILLAR MONITORING SYSTEM

TRANSMISSION ECM


8 7

J63

A B C D E F G SERVICE TOOL CONNECTOR

DATA LINKS

8 7

P1 J1 70 65 42 8 9 34 50


ENGINE ECM

BAT + (SWITCHED) BAT SHIELD CAT DATA LINK + CAT DATA LINK CAN DATA LINK CAN DATA LINK +

C7

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