Diagrama 3126B [PDF]

Zitiervorschau

ECM Connectors 6 HEUI Injectors

Engine Control Module

RENR1368-04 May 2001

Cab Diagnostic Connector

0-00 1-11 2-11 3-11 4-11 5-11 6-11 22-13 30-08 30-13 41-03 41-04 42-11

- 12 V +

Batteries Cruise Control On/Off & Set/Resume Switches

ECM Side

ECM Connector P1

Harness Side Accelerator Pedal Position Sensor

Top Camshaft Speed/Timing Sensor

Caterpillar Installed

Bottom Camshaft Speed/Timing Sensor

ECM Side

ECM Connector P2

Harness Side Injection Actuation Pressure Sensor

DT Connector Receptacle

OEM Installed

Coolant Level Sensor

Check Engine Lamp

Warning Lamp

3126B and 3126E Truck Engine Electrical System

Speedometer & Tachometer

DT Connector Plug

45 35 25

Boost Pressure Sensor

15 55

20 65

10

75

15

25

5

5 0

Receptacle Wedge

Atmospheric Pressure Sensor

Plug Wedge

A/C High Pressure Switch

MPH

85

RPM X 1000

30

Cooling Fan

(Specific Ratings Only)

Vehicle Speed Sensor

Receptacle Wedge Plug Wedge

Oil Pressure Sensor

Receptacle Wedge

PTO Accelerator Position Sensor

(Optional)

Fast Idle Enabled Lamp Or Wait To Start Lamp

Plug Wedge

HD Connector Receptacle

HD Connector Plug

Oil Level Switch (Optional)

Fast Idle Enable Switch

Coolant Temperature Sensor

Pin Contact

Socket Contact

PTO Switch On Lamp

PTO On/Off & PTO Set/Resume Switches

Transmission Neutral Switch

AT/MT/HT Transmission Relay

Sealing Plug

Intake Manifold Air Temperature Sensor

Speed/Timing Sensor Connectors

IAPCV Connector

Intake Air Heater Relay

Exhaust Brake Exhaust Brake On/Off Switch

Intake Air Heater Lamp

Intake Air Heater A

150 Series Receptacle

150 Series Plug © 2001 Caterpillar All Rights Reserved

Printed in U.S.A.

BKD1-UP 1AJ1-UP 8YL1-UP CKM1-UP CRP1-UP 7AS1-UP 8SZ1-UP 9SZ1-UP

Diagnostic Code Listing Flash PID-FMI Description Codes 55 102-04 Boost Press Sensor Short Circuit 72 102-07 Excessive Boost Pressure 72 105-03 Inlet Manifold Air Temp Sensor Open Circuit 73 105-04 Inlet Manifold Air Temp Sensor Short Circuit 73 108-03 Atmospheric Press Sensor Open Circuit 74 108-04 Atmospheric Press Sensor Short Circuit 74 110-00 High Coolant Temp Warning 42 110-03 Coolant Temp Sensor Open Circuit 29 110-04 Coolant Temp Sensor Short Circuit 29 110-11 Very High Coolant Temp 21 111-01 Low Coolant Level Warning 21 111-02 Coolant Level Sensor Fault 18 111-11 Very Low Coolant Level

70-05 70-06 71-00 71-01 71-14 84-00

Vehicle Overspeed Warning

41

190-11

84-01 84-02 84-08 84-10 91-08 91-13 100-03 100-04 100-11 102-03

Loss of Vehicle Speed Signal Invalid Vehicle Speed Signal Vehicle Speed Out of Range Vehicle Speed Rate of Change Invalid Throttle Signal Throttle Sensor Calibration Oil Press Sensor Open Circuit Oil Press Sensor Short Circuit Very Low Oil Press Boost Press Sensor Open Circuit

31 36 36 36 32 28 24 24 46 25

224-11 224-14 231-11 232-03 232-04 246-11 247-11 252-11 253-02 253-14

64-11

Clutch and Service Brake Switches

Description No Detected Faults Cylinder 1 Fault Cylinder 2 Fault Cylinder 3 Fault Cylinder 4 Fault Cylinder 5 Fault Cylinder 6 Fault Check Timing Sensor Calibration Invalid PTO Throttle Signal PTO Throttle Sensor Calibration 8 Volt Supply Above Normal 8 Volt Supply Below Normal Injection Actuation Press Control Valve Driver Fault Ignition Key Switch Fault Loss of Engine RPM Signal on Engine Speed and Timing Sensor Number 2 No Pattern on Engine Speed and Timing Sensor Number 2 Inlet Air Heater Open Circuit Inlet Air Heater Short Circuit Idle Shutdown Override Idle Shutdown Occurrence PTO Shutdown Occurrence

43-02 64-02

Ignition Key Switch

Injection Actuation Pressure Control Valve (IAPCV)

PID-FMI

Flash Codes 25 25 38 38 26 26 61 27 27 61 62 12 62

71 34

164-00 164-02

Injection Actuation Press Out of Range Injection Actuation Press Sensor Erratic

17 15

34

164-03

Injection Actuation Press Open Circuit

15

49 49 01 47 47

164-04 164-11 168-02 190-00 190-02

Injection Actuation Press Short Circuit Injection Actuation Press System Intermittent Battery Power to the ECM Engine Overspeed Warning Loss of RPM Signal on Engine Speed and Timing Sensor Number 1 No Pattern on Engine Speed and Timing Sensor Number 1 Theft Deterrent Enabled Engine Cranking / Theft Deterrent Enabled J1939 Data Link Fault 5 Volt Supply Above Normal 5 Volt Supply Below Normal Service Brake Switch Number 1 Fault Service Brake Switch Number 2 Fault Incorrect Engine Software Check Customer or System Parameters Truck Manuf. Parameter Not Programmed

15 39 51 35 34 34 00 00 58 21 21 00 00 59 56 56

INJECTOR CYLINDER NO.1

ENGINE BOOST PRESSURE

A702-PU

INJECTOR CYLINDER NO.3

C B A

C B A

COMPONENTS ARE SHOWN WITH THE KEY OFF UNLESS OTHERWISE SPECIFIED: ALL WIRES TO BE 18 AWG OR LARGER SAE J1560 TYPE TXL OR EQUIVALENT. FOR TWISTED PAIR SPECIFICATION SEE J1708.

ENGINE INTAKE MANIFOLD AIR TEMPERATURE ENGINE TEMPERATURE SENSOR COMMON

G458-GY G829-GN

995-BU G833-PK

C967-BU G833-PK

J103 P103

1 2

J100 P100

1 2

J802 P802

1 2

994-GY G827-BU G826-BR

A747-GY G829-GN G828-WH

G849-BR G829-GN G828-WH

A705-BU

L985-YL

TO ENGINE CYLINDER HEAD (NOT CYLINDER HEAD GROUND STUD)

C977-BU

H795-PK

BK RD WH

H795-PK C985-BU C986-BR J403 P403

B A C

B A

COOLANT TEMPERATURE SENSOR

ENGINE SPEED/TIMING SENSORS

INJECTION ACTUATION PRESSURE CONTROL VALVE (IAPCV)

INJECTOR HARNESS GROMMET

OIL PRESSURE SENSOR (OPTIONAL)

INJECTION ACTUATION PRESSURE SENSOR

INLET AIR TEMPERATURE SENSOR

OIL LEVEL SWITCH (OPTIONAL)

NOTE A

NOTE A

H795-PK

451-BR

450-YL

L902-GN

FAST IDLE ENABLE SWITCH

NOTE A

SIGNAL-

SIGNAL+

SPEEDOMETER NOTE A

G882-WH

A B

NOTE A

G808-BU G809-GN

INLET AIR HEATER RELAY

BOOST PRESSURE SENSOR

ATMOSPHERIC PRESSURE SENSOR

1 2

28 29 30 31 43 22 23 56 57 65 66 69 20 21 8

49 48 13 50 19 59 58

25 51 52 53 60 33 32 35 9 34 26 18 10 11 12

VEHICLE SPEED IN POSITIVE VEHICLE SPEED IN NEGATIVE INPUT #8 (REMOTE ACCELERATOR) AP SENSOR/SWITCH SENSOR COMMON +8V ACCELERATOR PEDAL POSITION OUTPUT #5

INPUT #11

+5V INPUT #7 ENGINE COOLANT LEVEL NORMAL ENGINE COOLANT LEVEL LOW INPUT #12

INPUT SENSOR COMMON #1 CLUTCH PEDAL POSITION SWITCH

INPUT #5 INPUT #13 INPUT #6

SET RESUME INPUT #1 (PTO ON/OFF SWITCH) INPUT #2 INPUT #18 OUTPUT #8 CRUISE CONTROL ON/OFF SWITCH INPUT #3 INPUT #4 SERVICE BRAKE PEDAL POSITION SWITCH

UNSWITCHED +BATTERY UNSWITCHED +BATTERY -BATTERY -BATTERY OUTPUT #6 OUTPUT #7

IGNITION KEY SWITCH

J1587 DATA LINK NEGATIVE J1587 DATA LINK POSITIVE J1939 DATA LINK SHIELD J1939 DATA LINK NEGATIVE J1939 DATA LINK POSITIVE

INPUT SENSOR COMMON #2 INPUT #14 TACHOMETER POSITIVE TACHOMETER NEGATIVE

SPEEDOMETER POSITIVE SPEEDOMETER NEGATIVE

EXHAUST BRAKE ON/OFF SWITCH

OUTPUT #2 OUTPUT #3 OUTPUT #4

WARNING LAMP CHECK ENGINE LAMP OUTPUT #1 OUTPUT #9

INTAKE AIR HEATER RELAY

ENGINE TIMING CALIBRATION PROBE+ ENGINE TIMING CALIBRATION PROBE-

BOTTOM CAMSHAFT SPEED/TIMINGBOTTOM CAMSHAFT SPEED/TIMING+

TOP CAMSHAFT SPEED/TIMINGTOP CAMSHAFT SPEED/TIMING+

ENGINE TEMPERATURE SENSOR COMMON

INPUT #16 ENGINE OIL LEVEL SWITCH ENGINE COOLANT TEMPERATURE ENGINE INTAKE MANIFOLD AIR TEMPERATURE

ECM GROUND STRAP

ENGINE OIL PRESSURE SENSOR +5V

ENGINE OIL PRESSURE SENSOR COMMON

ENGINE OIL PRESSURE SENSOR

ENGINE ATMOSPHERIC PRESSURE ENGINE PRESSURE SENSOR COMMON ENGINE PRESSURE SENSOR +5V

ENGINE BOOST PRESSURE ENGINE INJECTION ACTUATION PRESSURE

IAP CONTROL VALVE IAP CONTROL VALVE COMMON

INJECTOR COMMON CYLINDERS 1 & 2 INJECTOR COMMON CYLINDERS 3 & 4 INJECTOR COMMON CYLINDERS 5 & 6 INJECTOR CYLINDER 6 INJECTOR CYLINDER 5 INJECTOR CYLINDER 4 INJECTOR CYLINDER 3 INJECTOR CYLINDER 2 INJECTOR CYLINDER 1

VEHICLE HARNESS CONNECTOR J1/P1

ENGINE GROUND STUD CONNECTION

ENGINE CONTROL MODULE

TO ECM MOUNTING BOLT

ENGINE GROUND STUD CONNECTION

ENGINE HARNESS CONNECTOR J2/P2

BOOST PRESSURE SENSOR

VEHICLE HARNESS CONNECTOR

G808-BU G809-GN G845-PU H795-PK C985-BU C986-BR G837-YL

E971-GN

G844-PK C983-WH C984-YL 409-OR

G879-OR

G842-GY G882-WH G843-OR L901-GY C977-BU

C978-BR C979-OR K999-GN K980-PK L902-GN G840-PU C975-WH K982-YL G841-GN C992-PU

101-RD 101-RD 229-BK 229-BK G838-BR G839-BU

J906-BR

E793-BU E794-YL A249-BK K990-GN K900-YL

993-BR F713-OR 450-YL 451-BR

C973-GN

C974-PU

C981-GY

E718-PK E991-GY G836-WH

29 28 30 31 48 61 10 12 13 15 16 63 36 37 27 26 3 17 38 39 57 43 9 8 42 34 50 1 14 70 25 52 53 65 67 19 20 51 35 44 56 58 40 21 59 60 7 45 55 47 64 6 18 22 23 2 46 49 54 62 24 41 69 32 33 68 5 4 66 11 P1 J1

G850-BU

G856-WH G857-YL

E965-BU E966-YL

E963-BK E964-WH

G833-PK

G883-GN G458-GY 995-BU C967-BU

994-GY G827-BU G826-BR

44 45 46 55 54 39 38 37 36 47 67 68 1 63 64 4 5 61 62 70 40 27 6 7 14 3 2 15 16 17 24 42 41

P2 J2

ENGINE HARNESS CONNECTOR

A747-GY G829-GN G828-WH

A746-PK G849-BR

G854-PK G855-PU

L983-WH L984-OR L985-YL A706-GY A705-BU A704-GN A703-BR A702-PU A701-GY

659-PK L994-YL K998-BU G880-PK

NOTE A

NOTE A

NOTE A

G850-BU C987-RD

P648

C987-RD G850-BU

J400 P400

(TRANSMISSION IN GEAR) NOTE A

NOTE A

FLYBACK DIODE

A B J402 P402

N/O MOMENTARY SWITCH

ATMOSPHERIC PRESSURE SENSOR (SELECT RATINGS ONLY)

COOLING FAN SOLENOID NOTE A

PASSIVE MAGNETIC VEHICLE SPEED SENSOR

A B J401 P401

C973-GN

(PEDAL RELEASED POSITION)

409-OR

A B J500 P500

C974-PU

B A

14 AWG GXL 14 AWG GXL 14 AWG GXL 14 AWG GXL

SIGNAL-

SIGNAL+

EXHAUST BRAKE ON/OFF SWITCH

TRANSMISSION NEUTRAL SWITCH N/O

LEFT SIDE VIEW

INLET AIR HEATER

INLET AIR HEATER

INLET AIR TEMPERATURE SENSOR

B A J648

INTAKE AIR HEATER

N/O RELAY

1 2

J501 P501

ENGINE TIMING CALIBRATION PROBE+ ENGINE TIMING CALIBRATION PROBE-

SERVICE BRAKE PEDAL POSITION SWITCH #2 N/O

TOP VIEW

+BAT.

+BAT.

BOTTOM CAMSHAFT SPEED/TIMINGBOTTOM CAMSHAFT SPEED/TIMING+

K995-OR

6 5 4 3 2 1 P300 J300

TOP CAMSHAFT SPEED/TIMINGTOP CAMSHAFT SPEED/TIMING+

BOTTOM CAMSHAFT ENGINE SPEED/TIMING SENSOR

TACHOMETER NOTE A

NOTE A

A706-GY

INJECTION ACTUATION PRESSURE CONTROL VALVE (IAPCV)

TOP CAMSHAFT ENGINE SPEED/TIMING SENSOR

INJECTOR CYLINDER NO.6

J306 P306

L985-YL

12 11 10 9 8 7

INJECTOR HARNESS GROMMET

ENGINE CONTROL MODULE

INJECTION ACTUATION PRESSURE CONTROL VALVE

INJECTOR HARNESS GROMMET

INJECTION ACTUATION PRESSURE SENSOR

G844-PK N/O MOMENTARY SWITCH

H795-PK

DIAGNOSTIC ENABLE SWITCH

C992-PU

SERVICE BRAKE PEDAL POSITION SWITCH N/C

NOTE A: THIS IS AN OPTIONAL FEATURE NOT INSTALLED ON ALL VEHICLES.

SENSOR ACCELERATOR PEDAL POSITION

ACCELERATOR PEDAL SENSOR/SWITCH SENSOR COMMON +8 V ACCELERATOR PEDAL POSITION

E971-GN

A/C HIGH PRESSURE SWITCH N/C

H795-PK

C978-BR C979-OR

20A

+BAT. B -BAT. A J H J1587 - G E793-BU J1587 + F E794-YL A249-BK J1939 SHIELD E J1939 - D K990-GN J1939 + C K900-YL NOTE A

SET/RESUME SWITCH

H795-PK

FLYBACK DIODE

G880-PK

659-PK

L994-YL

C987-RD

INTAKE AIR HEATER LAMP

9 PIN CAB CONNECTOR

EXHAUST BRAKE SOLENOID

FAST IDLE ENABLED LAMP OR WAIT TO START LAMP

WARNING LAMP

CHECK ENGINE LAMP

100A WITH 130A PEAK AT 11V

H795-PK (PEDAL RELEASED POSITION)

CLUTCH PEDAL POSITION SWITCH N/C

COMPONENTS WITHIN THIS AREA ARE CATERPILLAR PROVIDED

NOTE A

NOTE A

C975-WH CRUISE CONTROL ON/OFF SWITCH

H795-PK

(PEDAL RELEASED POSITION)

NOTE A

NOTE A

NOTE A

NOTE A NOTE A

ENGINE BLOCK

BATTERY 1

BATTERY 2 BATTERY 3

K995-OR TO ALLISON AT/MT/HT SHIFT MODULATOR FOR AUTOMATIC TRANSMISSIONS

- 12V +

- 12V +

STARTER MOTOR (12V)

N/O RELAY

- 12V +

NOTE A

GROUND

ALTERNATOR

OFF ON START

KEY SWITCH

CIRCUITS WITHIN THIS AREA ARE RECOMMENDATIONS

C987-RD

3126B & 3126E OEM VEHICLE HARNESS WIRING DIAGRAM

NOTE A: THIS IS AN OPTIONAL FEATURE NOT INSTALLED ON ALL VEHICLES.

(-) BATTERY / SENSOR RETURN

SIGNAL MINUS

SIGNAL PLUS

SENSOR SUPPLY VOLTAGE

OUTPUT SIGNAL WIRES FROM ECM

INPUT SIGNAL WIRES TO ECM

(+) BATTERY SUPPLY WIRES

ENGINE INTAKE MANIFOLD AIR TEMPERATURE SENSOR

ENGINE COOLANT TEMPERATURE ENGINE TEMPERATURE SENSOR COMMON

P201 J201

GN YL OR

C B A

P203 J203

GN YL OR

A746-PK G829-GN G828-WH

J200 P200

C B A

P204 J204

GN YL 0R

GN YL OR

A704-GN

INJECTOR CYLINDER NO.5

B A

INJECTOR CYLINDER NO.4

J305 P305

B A

L984-OR

J304 P304

A703-BR

ENGINE COOLANT TEMPERATURE SENSOR

ENGINE OIL PRESSURE SENSOR ENGINE OIL PRESSURE SENSOR COMMON ENGINE OIL PRESSURE SENSOR +5V

ENGINE PRESSURE SENSOR +5V

ENGINE PRESSURE SENSOR COMMON

ENGINE ATMOSPHERIC PRESSURE

ENGINE PRESSURE SENSOR +5V

ENGINE PRESSURE SENSOR COMMON

ENGINE INJECTION ACTUATION PRESS.

ENGINE PRESSURE SENSOR +5V

ENGINE PRESSURE SENSOR COMMON

INJECTOR CYLINDER NO.2

B A

J303 P303

L984-OR

ENGINE OIL LEVEL ENGINE OIL LEVEL COMMON

A701-GY

B A

J302 P302

L983-WH

ENGINE OIL LEVEL SWITCH NOTE A

ENGINE OIL PRESSURE SENSOR NOTE A

ENGINE ATMOSPHERIC PRESSURE SENSOR NOTE A

ENGINE INJECTION ACTUATION PRESSURE SENSOR

ENGINE BOOST PRESSURE SENSOR

B A

J301 P301

L983-WH

3126B & 3126E ENGINE HARNESS WIRING DIAGRAM

ENGINE CONTROL MODULE