©2001 CaterpillarAll Rights Reserved
Printed in U.S.A.
RENR2237-02May 2001
C-10, C-12, 3406E, C-15, and C-16Truck Engine Electrical SystemCPD1-UP1MM1-UP2KS1-UP2WS1-UP
6NZ1-UP7CZ1-UP
3CS1-UP
FuelTemperatureSensor
EngineGroundStud
CrankshaftPositionSensor
CamshaftPositionSensor
OEMVehicleHarnessConnectorJ1/P1
EngineHarnessConnectorJ2/P2
EngineGroundStud
OilPressureSensor
ElectronicUnitInjectorConnector
AtmosphericPressureSensor
EngineControlModule(ECM)
C-10 and C-12 Left Side View
C-15 and C-16 Left Side View3406E Left Side View
CoolantTemperatureSensor
InletManifoldAirTemperatureSensor
BoostPressureSensor
AtmosphericPressureSensor
C-10 and C-12 Front Right Side View C-10 and C-12 Front Top View
C-15 and C-16 Front Top View
BoostPressureSensor
ElectronicUnitInjectorConnector
InletManifoldAirTemperatureSensor
EngineGroundStud
CamshaftPositionSensor
OEMVehicleHarnessConnectorJ1/P1
FuelTemperatureSensor
AtmosphericPressureSensor
CrankshaftPositionSensor Engine
HarnessConnectorJ2/P2
EngineControlModule(ECM)
3406E Right Side View 3406E Front View
OilPressureSensor
CoolantTemperatureSensor
BoostPressureSensor
ElectronicUnitInjectorConnector
InletManifold AirTemperatureSensor
EngineGroundStud
CamshaftPositionSensor
OEMVehicleHarnessConnectorJ1/P1
EngineHarnessConnectorJ2/P2
CrankshaftPositionSensor Atmospheric
PressureSensor
OilPressureSensor
EngineControlModule(ECM)
CoolantTemperatureSensor
FuelTemperatureSensor
InletManifold AirTemperatureSensor
C-10, C-12, 3406E, C-15, and C-16 ENGINE HARNESS WIRING DIAGRAM
C-10, C-12, 3406E, C-15, and C-16 OEM VEHICLE HARNESS WIRING DIAGRAM
ENGINE FUEL TEMPERATUREENGINE TEMPERATURE SENSOR COMMON
12
995-BUG833-PK
J100 P100
ENGINE COOLANT TEMPERATUREENGINE TEMPERATURE SENSOR COMMON
ENGINE INTAKE MANIFOLD AIR TEMPERATUREENGINE TEMPERATURE SENSOR COMMON
J103 P103
C967-BUG833-PK
12
A751-YLG833-PK
995-BUC967-BUA751-YL
G833-PKG832-ORG827-BU
12
J105 P105
E963-BKE964-WH
E965-BUE966-YL
12
J401 P401
CRANK SPEED/TIMING-CRANK SPEED/TIMING+
CRANKSHAFTPOSITION SENSOR
E963-BKE964-WH
E965-BUE966-YL
CAMSHAFTPOSITION SENSOR
CAM SPEED/TIMING-CAM SPEED/TIMING+
J402 P402
12
INJECTOR COMMON CYLINDERS 1 & 2INJECTOR COMMON CYLINDERS 3 & 4INJECTOR COMMON CYLINDERS 5 & 6INJECTOR CYLINDER 6INJECTOR CYLINDER 5INJECTOR CYLINDER 4INJECTOR CYLINDER 3INJECTOR CYLINDER 2INJECTOR CYLINDER 1RETARDER SOLENOID MED/HIRETARDER SOLENOID LOW/HIRETARDER SOLENOID COMMON
P1 J1
ENGINE HARNESS CONNECTOR
4445465554393837361011 9
ENGINE RETARDERSOLENOID CYLINDERS
3 & 4 NOTE H
ENGINE RETARDERSOLENOID CYLINDERS
5 & 6 NOTE H
ENGINE RETARDERSOLENOID CYLINDERS
1 & 2 NOTE H
P2 J2
TO ECMMOUNTINGBOLT
54227172223265060
304753 4
41 1
5156576768697065665231
INPUT #17ENGINE BOOST PRESSUREENGINE ATM PRESSUREENGINE OIL PRESSURE
ENGINE PRESSURE SENSOR COMMONENGINE PRESSURE SENSOR +5V
4014242516 3 2
819121343202161626364282915
CRANK SPEED/TIMING NEGATIVECRANK SPEED/TIMING POSITIVE
CAM SPEED/TIMING NEGATIVECAM SPEED/TIMING POSITIVE
ENGINE COOLANT TEMPERATUREENGINE INTAKE MANIFOLD AIR TEMPERATUREENGINE FUEL TEMPERATURE
ENGINE TEMPERATURE SENSOR COMMONINPUT SENSOR COMMON #4INPUT SENSOR COMMON #3
3235333418
5958 6 7
4948
SPEEDOMETERNOTE ENOTE H
ECM GND STRAP
SENSOR ACCELERATORPEDAL POSITION
BKRDWH
J403 P403
ACCELERATOR PEDAL SENSOR/SWITCH SENSOR COMMON+8 V
ACCELERATOR PEDAL POSITION
BAC
C977-BU
E716-GYG879-ORC983-WHC984-YL
H795-PK
H795-PK
A/C HIGH PRESSURE SWITCHN/C
E971-GN
G883-GN
450-YL
451-BR
SIGNAL+
SIGNAL-
TACHOMETERNOTE ENOTE H
INPUT #16
CLUTCH PEDAL POSITION SWITCH
E793-BUE794-YL
INPUT #11 (NOTE L)INPUT #15 POSITIVE
RETARDER SOLENOID LOW/HI SWITCH+5VENGINE COOLANT LEVEL NORMAL (NOTE G)ENGINE COOLANT LEVEL LOW (NOTE G)RETARDER SOLENOID MED/HI SWITCH
INPUT #15 NEGATIVEVEHICLE SPEED IN POSITIVE (NOTE F)VEHICLE SPEED IN NEGATIVE
INPUT #8 (NOTE L)
20A
NOTE H
14 AWG GXL14 AWG GXL14 AWG GXL14 AWG GXL
ACCELERATOR PEDAL SENSOR/SWITCH SENSOR COMMON+8VACCELERATOR PEDAL POSITION
226323 24954
PASSIVEMAGNETIC
VEHICLE SPEEDSENSOR
G808-BUG809-GN
H795-PK
H795-PK
E717-GN
E716-GY
SET/RESUME SWITCH
NOTE J
ENGINEBLOCK
4124
E971-GNG834-PU
COMPONENTS WITHIN THIS AREA ARE CATERPILLAR PROVIDED
CLUTCH PEDAL POSITION SWITCH N/C
SERVICE BRAKE PEDAL POSITION SWITCH N/C
(PEDAL RELEASED POSITION)
626461
COOLING FAN SOLENOID
CRUISE CONTROL ON/OFF SWITCH
CHECK ENGINE LAMP
GNYLOR
ENGINE BOOST PRESSUREENGINE PRESSURE SENSOR COMMON
ENGINE PRESSURE SENSOR +5VP200 J200
ABC
WARNING LAMP
TO J1922 DATA LINK CONNECTORTO J1922 DATA LINK CONNECTOR
+BAT.-BAT.
J1587 DL NEGATIVEJ1587 DL POSITIVE
TO J1939 DATA LINK CONNECTOR
TO J1939 DATA LINK CONNECTORTO J1939 DATA LINK CONNECTOR
12
D
H795-PK
EC
405155
NOTE C: "SINGLE" WINDING MAGNETIC PICKUP SENSOR RECOMMENDED
F
CAB DIAGNOSTIC TOOL CONNECTOR
BA
5 466
2532336968
VEHICLE HARNESS CONNECTOR
TO VEHICLECOMPONENTS
P2 J2
H795-PKC985-BUC986-BR
L994-YL659-PK
K998-BUG880-PKJ906-BRG881-BU
G882-WH
CIRCUITS WITHIN THIS AREA ARE RECOMMENDATIONS
SERVICE BRAKE PEDAL POSITION SWITCHINPUT SENSOR COMMON #1INPUT #5 (NOTE L)INPUT #6 (NOTE L)INPUT #7 (NOTE L)
SIGNAL-
SIGNAL+
START
ONOFF
BS
C
NOTE H
R
451847 646
C992-PUL901-GYG842-GYG843-ORG844-PK
H795-PK
45.5
mA
MA
X
INJECTORCYLINDER
NO.6
INJECTORCYLINDER
NO.5
C974-PUC973-GNE718-PKE991-GY
G836-WH
GS
MTRBAT
STARTERMOTOR
(12V)
CRUISE CONTROL ON/OFF SWITCHINPUT #3 (NOTE L)INPUT #4 (NOTE L)
5960 7
BATTERY 2
C975-WHK982-YL
G841-GN
N/ORELAY
H795-PKC985-BUC986-BR
SETRESUMEINPUT #1 (NOTE L)INPUT #2 (NOTE L)
C978-BRC979-OR
C977-BU
C992-PU
C975-WH
35445658
C978-BRC979-ORK999-GNK980-PK
C973-GN
C974-PUKEY SWITCH
659-PK
GROUND
L994-YL
ALTERNATOR
- 12V+- 12V+ +
P1 J1
12V
INJECTORCYLINDER
NO.4
INJECTORCYLINDER
NO.3
-
BATTERY 3 BATTERY 1
G884-YLA746-PKA747-GY
994-GY
G829-GNG828-WH
L983-WHL984-ORL985-YL
A706-GYA705-BUA704-GNA703-BRA702-PUA701-GYJ700-BRJ701-GNJ702-BK
NOTE J: ENGINE BLOCK MUST HAVE A DIRECT WIRE CONNECTIONTO BATTERY(-). THIS CONNECTION CAN BE MADE AT THESTARTER(-) TERMINAL OR MAINFRAME GROUND LUG
NOTE M: J1922 AND J1939 DATA LINKS MUST BE PROGRAMMED FOR ECM TOINTERACT ON DATA LINK, J1939 MUST NOT BE PROGRAMMED UNLESS USED IF PROGRAMMED WITHOUT PROPER CONNECTION A DIAGNOSTIC CODE WILL RESULT
G835-ORG808-BUG809-GN
G845-PU
J1587 DATA LINK NEGATIVEJ1587 DATA LINK POSITIVEJ1939 DATA LINK SHIELD (NOTE K & NOTE M)J1939 DATA LINK NEGATIVE (NOTE K & NOTE M)J1939 DATA LINK POSITIVE (NOTE K & NOTE M)J1922 DATA LINK POSITIVE (NOTE M)J1922 DATA LINK NEGATIVE (NOTE M)
UNSWITCHED +BATTERY (NOTE D)UNSWITCHED +BATTERY (NOTE D)-BATTERY-BATTERYINPUT #9 INPUT #10 INPUT SENSOR COMMON #2INPUT #14
525365672726 317
E717-GN
101-RD 101-RD 229-BK 229-BK
G933-YLC453-YL 993-BR
F713-OR
9 8423450 1144843
TACHOMETER POSITIVETACHOMETER NEGATIVEOUTPUT #5OUTPUT #6OUTPUT #7OUTPUT #8
38391119202157
450-YL 451-BR
G837-YLG838-BRG839-BUG840-PU
L983-WHL984-ORL985-YL
A706-GYA705-BUA704-GNA703-BRA702-PUA701-GYJ700-BRJ701-GNJ702-BK
NOTE CNOTE F
GNYLOR
ENGINE OIL PRESSUREENGINE PRESSURE SENSOR COMMON
ENGINE PRESSURE SENSOR +5V
P201 J201
ABC 994-GY
G829-GNG828-WH
A747-GYG829-GNG828-WH
CBA
P203 J203
ENGINE ATMOSPHERIC PRESSUREENGINE PRESSURE SENSOR COMMON
ENGINE PRESSURE SENSOR +5V
GNYLOR
SPEEDOMETER POSITIVESPEEDOMETER NEGATIVEOUTPUT #2OUTPUT #3OUTPUT #4
LOMED
36371012131516
1210
8654321
1197
J300 P300
ENGINE TIMING CALIBRATION PROBE POSITIVEENGINE TIMING CALIBRATION PROBE NEGATIVE
ENGINE TIMING CALIBRATION PROBE POSITIVEENGINE TIMING CALIBRATION PROBE NEGATIVE
12
A746-PKG829-GNG828-WH
HI
ENGINE RETARDERSOLENOID SELECTOR SWITCH
NOTE H
2829303170
NOTE E: THE ECM SPEEDOMETER AND TACHOMETER OUTPUT SIGNAL LINEVOLTAGES ARE ZERO-CROSSING SQUARE WAVES. THE SPEEDOMETERSIGNALS AT J1-37 AND J1-36 ARE COMPLEMENTS OF EACH OTHER.THE TACHOMETER SIGNALS AT J1-38 AND J1-39 ARE COMPLEMENTS
(PEDAL RELEASED POSITION)
G856-WHG857-YL
HI
CHECK ENGINE LAMPWARNING LAMPOUTPUT #1OUTPUT #9IGNITION KEY SWITCH
MEDLO
ENGINE RETARDERSOLENOID
ON/OFF SWITCH
INJECTORCYLINDER
NO.1
INJECTORCYLINDER
NO.2
NOTE H
INPUT #12INPUT #13
E793-BUE794-YLA249-BKK990-GNK900-YL
E721-WHE720-PK
NOTE L: SENSOR COMMON CONNECTION FOR INPUTS #1 THROUGH #8AND #11 MAY BE MADE TO EITHER J1-5 OR J1-18J1-18 IS FOR BODY BUILDER/AFTERMARKET INSTALLATIONS
OF EACH OTHER. FOR SPEEDOMETERS WITH A SINGLE SIGNAL INPUTTERMINAL, EITHER ONE OF THE TWO SIGNAL OUTPUT LINES FROM THE ECM MAY BE USED.
NOTE F: AN ELECTRONIC SIGNAL MAY BE PROVIDED IN PLACE OF A PASSIVE MAGNETIC SENSOR, THE ELECTRONIC SIGNAL INPUT WILL BECONNECTED TO THE +SIGNAL PIN.
NOTE H: A DASHED LINE INDICATES AN OPTIONAL FEATURE NOT AVAILABLEON ALL SYSTEMS.
ENGINE BOOSTPRESSURE SENSOR
ENGINE ATMOSPHERICPRESSURE SENSOR
ENGINE OILPRESSURE SENSOR
ENGINE COOLANTTEMPERATURE SENSOR
ENGINE INTAKEMANIFOLD AIRTEMPERATURE SENSOR
ENGINE FUELTEMPERATURE SENSOR
J400 P400
TO +BATTERY
ALL SWITCHES ARE SHOWN IN THE OFF POSITIONUNLESS OTHERWISE SPECIFIED:ALL WIRES TO BE 18 AWG OR LARGER SAE J1128 TYPE SXLOR EQUIVALENT. FOR TWISTED PAIR SPECIFICATION SEE SAE J1708
PID-FMI DescriptionFlashCodes
PID-FMI DescriptionFlashCodes
0-00 No Detected Faults 55 105-04 Intake Manifold Temp Sensor Short Circuit 381-11 Cylinder 1 Fault 72 105-11 Very High Intake Manifold Temp Warning 642-11 Cylinder 2 Fault 72 108-03 Atmospheric Pressure Sensor Open Circuit 263-11 Cylinder 3 Fault 73 108-04 Atmospheric Pressure Sensor Short Circuit 264-11 Cylinder 4 Fault 73 110-00 High Coolant Temp Warning 615-11 Cylinder 5 Fault 74 110-03 Coolant Temp Sensor Open Circuit 276-11 Cylinder 6 Fault 74 110-04 Coolant Temp Sensor Short Circuit 2722-11 Cam Sensor to Crank Sensor Calibration 42 110-11 Very High Coolant Temp Warning 6122-13 Check Timing Sensor Calibration 42 111-01 Low Coolant Level Warning 6230-08 Invalid PTO Throttle Signal 29 111-02 Coolant Level Sensor Fault 1230-13 PTO Throttle Sensor Calibration 29 111-11 Very Low Coolant Level 6241-03 8 Volt Supply Above Normal 21 121-05 Retarder Solenoid Lo/Hi Open Circuit 1441-04 8 Volt Supply Below Normal 21 121-06 Retarder Solenoid Lo/Hi Short Circuit 1443-02 Ignition Key Switch Fault 71 122-05 Retarder Solenoid Med/Hi Open Circuit 1454-05 Multi-Function Output #6 Open Circuit 66 122-06 Retarder Solenoid Med/Hi Short Circuit 1454-06 Multi-Function Output #6 Short Circuit 66 168-02 Low or Intermittent Battery Power to ECM 5155-05 Multi-Function Output #7 Open Circuit 67 171-03 Outside Air Temp Sensor Open Circuit 0055-06 Multi-Function Output #7 Short Circuit 67 171-04 Outside Air Temp Sensor Short Circuit 0064-12 Loss of Engine Cam Sensor RPM Signal 34 171-11 No Ambient Air Temp Data 0071-00 Idle Shutdown Override 01 174-00 High Fuel Temp Warning 6571-01 Idle Shutdown Occurrence 47 174-03 Fuel Temp Sensor Open Circuit 1371-14 PTO Shutdown Occurrence 47 174-04 Fuel Temp Sensor Short Circuit 1384-00 Vehicle Overspeed Warning 41 190-00 Engine Overspeed Warning 3584-01 Loss of Vehicle Speed Signal 31 190-12 Loss of Engine Crank Sensor RPM Signal 3484-02 Invalid Vehicle Speed Signal 36 191-07 Transmission Not Responding 6884-08 Vehicle Speed Out of Range 36 224-11 Theft Deterrent Enabled 0084-10 Vehicle Speed Rate of Change 36 224-14 Emergency Cranking With Theft Deterrent Enabled 0084-14 Quick Stop Occurrence 00 231-11 J1939 Data Link Fault 5891-08 Invalid Throttle Signal 32 232-03 5 Volt Supply Above Normal 2191-13 Throttle Sensor Calibration 28 232-04 5 Volt Supply Below Normal 21100-01 Low Oil Pressure Warning 46 244-02 Event Recorder Data Lost 02100-03 Oil Pressure Sensor Open Circuit 24 246-11 Brake Switch #1 Fault 00100-04 Oil Pressure Sensor Short Circuit 24 247-11 Brake Switch #2 Fault 00100-11 Very Low Oil Pressure 46 249-11 J1922 Data Link Fault 58102-00 Boost Pressure Sensor Stuck High 25 252-11 Incorrect Engine Software 59102-03 Boost Pressure Sensor Open Circuit 25 253-02 Check Customer or System Parameters 56102-04 Boost Pressure Sensor Short Circuit 25 253-11 Check Transmission Customer Parameters 56105-00 High Intake Manifold Temp Warning 64 253-14 Truck Manufacturer Parameter Not Programmed 56105-03 Intake Manifold Temp Sensor Open Circuit 38
Diagnostic Code Listing
Harness
Side
Harnes
EC
M C
onnector P1
EC
M C
onnector P2
sS
ideE
CM
Side
EC
MS
ide
EC
M C
onnectors
DT
Connector R
eceptacleD
T C
onnector Plug
Plug W
edge
Plug W
edge
Plug W
edge
Receptacle W
edge
Receptacle W
edge
Receptacle W
edge
HD
Connector R
eceptacleH
D C
onnector Plug
Pin C
ontactS
ealing Plug
Socket C
ontact
Speed/T
iming S
ensor Connectors
150 Series R
eceptacle
IAP
CV
Connector
150 Series P
lug
INPUT SIGNAL WIRES TO ECM
OUTPUT SIGNAL WIRES FROM ECM
SENSOR SUPPLY VOLTAGE
(+) BATTERY SUPPLY WIRES
SIGNAL PLUS
(-) BATTERY / SENSOR RETURN
SIGNAL MINUS
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