C6.6 - Electrical Schematic

Electrical Schematic Symbols And Definitions

RENR9554-01 January 2008

Symbols

Component Identifiers (CID¹) Engine Control Module CID

J2

Component

0001

Cylinder #1 Injector

0002

Cylinder #2 Injector

0003

Cylinder #3 Injector

0004

Cylinder #4 Injector

0005

Cylinder #5 Injector

0006

Cylinder #6 Injector

6

ECM connector No 6 injector return

ECM (Engine Control Module) 8 Volt DC Supply Throttle Position

63 No 5 injector

Circuit Breaker Symbol

Flow Symbol

Fuse - A component in an electrical circuit that will open the circuit if too much current flows through it.

8 No 4 injector return

0100

Engine Oil Pressure

0110

Engine Coolant Temperature Sensor

0168

System Voltage

0172

Intake Manifold Air Temperature Sensor

0190

Engine speed Signal

0247

SAE J.1939 Data Link

0253

Personality Module

34 No 2 injector return

0261

Engine Timing

58 No 2 injector

64 No 4 injector

Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The circle indicates that the component has screw terminals and a wire can be disconnected from it.

33 No 3 injector return 59 No 3 injector

0262

5 Volt Sensor DC Supply

0268

Programmable Parameters Fault

0342

Secondary Engine Speed Sensor

Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.). No circle indicates that the wire cannot be disconnected from the component. Ground (Wired): This indicates that the component is connected to a grounded wire. The grounded wire is fastened to the machine.

35 No 1 injector return 57 No 1 injector

0526

Turbo Wastegate Drive

0774

Secondary Throttle Position Sensor

1639

Machine Security System Module

1743

Engine Operation Mode Selection Switch

38 IMP return

1797

Fuel Rail #1Pressure Valve Solenoid

1785

Intake Manifold Pressure Sensor

55 IMP signal

1797

Fuel Rail Pressure Sensor

1834

Ignition Key Switch

2246

Glow Plug Start Aid Relay

47 Oil pressure Power (+5V) 39 Oil pressure sensor return 56 Oil pressure sensor signal 48 FMP sensor power supply (+5V)

Failure Mode Identifiers (FMI)¹

1

Data valid but below normal operational range (most severe).

2

Data erratic, intermittent, or incorrect.

3

Voltage above normal or shorted high. Voltage below normal or shorted low.

Reed Switch: A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.

C6.6 Industrial Engine Electrical System

Sender: A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. Its resistance changes to give an indication to the gauge of the temperature or pressure.

T

Relay (Magnetic Switch): A relay is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close the switch part of the relay.

666 1-UP

40 FMP sensor ground

Failure Description Data valid but above normal operational range (most severe).

4

Ground (Case): This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.

46 IMP Power supply (+5V)

¹ The CID is a diagnostic code that indicates which circuit is faulty.

51 FMP sensor signal

Solenoid: A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work.

43 Coolant temperature signal 42 IMT Signal

5

Current below normal or open circuit.

6

Current above normal or grounded circuit.

7

Mechanical system not responding properly.

8

Abnormal frequency, pulse width, or period.

9

Abnormal update.

10

Abnormal rate of change.

MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is activated by electricity and held latched by a permanent magnet. It has two coils (latch and unlatch) that make electromagnet when current flows through them. It also has an internal switch that places the latch coil circuit open at the time the coil latches.

37 Temperature sensor return 10 Speed sensor power (+8V)

11

Failure mode not identifiable.

12

Bad device or component.

13

Out of calibration.

14

Special Instruction.

15

Data valid but above normal operating range (least severe).

52 Crankshaft position sensor signal

16

Data valid but above normal operating range (moderate severe).

17

Data valid but below normal operating range (least severe).

18

Data valid but below normal operating range (moderate severe).

Harness And Wire Symbols

53 Secondary position sensor signal

Wire, Cable, or Harness Assembly Identification Pin

Socket

P

Component Part Number

J

105-9344

1

325-PK

26 Fuel injection pump solenoid PWM return

Receptacle Single Wire Connector

44 Wastegate return

Circuit Number Identification

17 Wastegate PWM signal

Event Codes Engine Control

Fuse

Wire Color

25 Fuel injection pump PWM signal

¹ The FMI is a diagnostic code that indicates what tpye of failure has occurred.

Event Code

Level Symbol

Symbols And Definitions

7 No 5 injector return

0091

0

Temperature Symbol

62 No 6 injector

0041

FMI No.

T

Pressure Symbol

Plug

2

200-BK

18 Bat + Ground Connection

45 Bat -

Condition

E172

High Air Filter Restriction

E232

High Fuel / Water Separator Water Level

21 CDL +

E360

Low Engine Oil Pressure

20 CDL -

E361

High Engine Coolant Temperature

23 J1939 -

E362

Engine Overspeed

E396

High Fuel Rail Pressure

24 J1939 +

E398

Low Fuel Rail Pressure

E539

High Intake Manifold Air Temperature

E2143

Low Engine Coolant Temperature

1 2

Pin or Socket Number

Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.

Typical representation of a Sure-Seal connector. The plug and receptacle contain both pins and sockets.

1 2

Printed in U.S.A.

© 2008 Caterpillar All Rights Reserved

Coolant Temperature

Fuel pressure sensor

Sensor ECM

Related Electrical Service Manuals Title

Form Number

Oil pressure sensor

Coolant temperature sensor

Inlet air pressure sensor Inlet air temperature sensor

Inlet air temperature sensor P681

P682

P683

Primary position sensor

Inlet air pressure sensor and Inlet air temperature sensor

Oil pressure sensor Fuel pressure sensor

Fuel Pressure Sensor

Fuel injection pump solenold

Solenoid for the Wastegate Primary posisition sensor Secondary position sensor

Starting motor

Oil pressure sensor Secondary position sensor

Primary position sensor

Alternator

12 Page

Inlet air pressure sensor Coolant temperature sensor

SENR 9969

RENR9554-01

Troubleshooting: C6.6 Industrial Engine

P2 Internal connection to the electronic fuel injector

External connection to the electronic fuel injector

T306

T305

Connector side

Harness

Harness side

Connector

side

side

J693

T962-BK T956-BK T961-BK T955-BK

INJECTOR CYLINDER 6

T304

INJECTOR CYLINDER 5

T303

INJECTOR CYLINDER 4

J691

T958-BK T952-BK T957-BK T951-BK

T302

INJECTOR CYLINDER 3

1

J692

T960-BK T954-BK T959-BK T953-BK

T301

P693

1 2 3 4

P692

1 2 3 4

P691

1 2 3 4

X931-YL X925-PK X930-GY X924-BR

6 62 7 63

X929-BU X923-OR X928-GN X922-WH

8 64 33 59

X927-YL X921-PK X926-GY X920-BR

System Overview

J2 ECM Connector P691

P692

J691

P693

J692

J693 P511

T301

T302

T303

T304

T305

T306

J511 P532 No.1

34 58 35 57

No.2

No.3

No.4

No.5

No.6

P402

INJECTOR CYLINDER 2

2

4

3

4

3

2

1

P200

INJECTOR CYLINDER 1

1 Inlet Manifold Pressure Sensor

Pressure connector

P401

J1

2 3

Temperature connector

T997-OR T993-BR X731-BU

46 38 55

L730-OR Y947-BR 994-GY

47 39 56

R997-0R Y948-BR Y946-BU

48 40 51

P200 P228

P201 1

Oil Pressure Sensor

2 3

J23

P201

P103

P228 1

Fuel Rail Pressure Sensor

Pressure sensor

Temperature sensor

Pressure sensor Voltage 1

1

Signal

2

Ground

2

Ground

3

Signal

Temperature sensor

2 3

P100 1

Coolant Temperature Sensor

995-BU C967-BU L731-BR

ECM side

1

25

25

8

32

32

8

33

57

57

33

40

64

64

40

43 42 37

P103 1 2 P401 Crankshaft Position Sensor

1

Harness side

1

2

Inlet Manifold Temperature Sensor

1 2 3

P100

1 2

996-GN E965-BU P920-BR

2

10 52 53

P402 Secondary Postion Sensor

1 2

P532 1 2

Fuel Injection Pump Solenoid

Pin 40 Pin 64 Y950-YL Y951-PU C211-BK M795-WH

P511 Wastegate Solenoid

Fuel injection pump solenoid connector

(Dimensions: 25 inches x 24 inches)

12 Page,

RENR9554-01

Inlet air pressure connector

1 2

Pin 33 Pin 32

A

9 Pin diagnostic connector J23

Diagnostic Connector J 23

D E

B

B

E

G A

F

101-RD 229-BK

18 45

Pin 1 Pin 25

Pin 8

Pin 32

Pin 33

C D

C

F

944-OR 945-BR Y793-YL Y792-PK

21 20 23 24

J2

Pin 57

Pin 40

Pin 64

H J

G

J H

Connection for No.1 and 2 electronic injector

J1 Pin Location Industrial Engine Pin Number Description

(+) BATTERY (+) BATTERY SWITCHED

Oil pressure connector

Battery (-)

Battery –ve

33

VS_RET

Sensor 0V Return

Battery (-)

34

Battery (-)

VS_RET SWG_ RET

Sensor 0V Return

3

Battery –ve Battery –ve

4

N/A

N/A

36

SWB 2

Maintenance Reset

5

N/A

37

SWB 1

6

N/A

N/A N/A

38

SWG 11

N/A Air Filter Restriction Switch

7

Battery (+)

40

SWG 10 SWK_0

Mode Switch 1

Battery (+)

Battery +ve Battery +ve

39

8 9

Battery (-)

41

VS_5_200mA

10

Battery (-)

Battery -ve Battery -ve

Sensor 5V Supply Sensor 5V Supply

11

DF_PWM 2 Shield N/A

43

12

N/A N/A

44

VS_8_100mA SWG 9

13

DF_PWM 2DF_PWM 2+

45

SWG 8

Throttle 1 IVS

14

N/A

N/A

46

SWG 7

Mode Switch 2

15

Battery (+)

SWG 6

Throttle Selection Switch or Coolant Level Switch

Battery (+)

Battery +ve Battery +ve

47

16

48

SWG 5

Remote Shutdown Switch (NO)

17

N/A N/A

SWG 4

PTO Mode Disengage (NC) PTO Mode Raise/Resume PTO Mode ON/OFF

Starting and charging

+

J23 Diagnostic connector

Relay

Fuse

18 19

P2 connector 30 50

Fuel pressuure connector

G

Starting motor Connection for No.5 and 6 Electronic injector

Alternator

B+ D+ W

N/A

35

42

49

VS_5_200mA

N/A N/A

50 51

SWG 3 SWG 2

J1939 CAN DL +

52

SWG 1

Switch Return

Ignition Switch Input

PWM Throttle Sensor 8V Supply Throttle 2 IVS

PTO Mode Set/Lower

20

N/A CAN (+)

21

CAN (-)

22

CAN A Shield CAN Shield

23

CDL (+)

CDL (+)

55

AIN_ACT 5

Throttle 2 Analogue Input

24

CDL (-)

CDL (-)

56

AIN_ACT 4

25

DOUT PWM RET PWM Return DOUT PWM RET PWM Return N/A N/A

57

DOUT_1A 1

58

DOUT_0.3A 10

N/A Start Aid Control Maintenance Due Lamp

59

DOUT_0.3A 9

60

DOUT_0.3A 8

61 62

DOUT_0.3A 4 DOUT_0.3A 3

PTO Mode Lamp

63

DOUT_0.3A 2

Cold Start Lamp

64

DOUT_0.3A 1

N/A

26

Crankshaft position sensor connector

Function

1

CAT DATA LINK (J1939) CAN DATA LINK

-

Description

2

CONTROL PLUS FROM ECM CONTROL MINUS FROM ECM

Connection for No.3 and 4 electronic injector

Pin Number

(-) BATTERY / SENSOR RETURN

SIGNAL PLUS TO ECM SIGNAL MINUS TO ECM

Battery

Function

STARTING CIRCUIT

SENSOR / ACTUATOR SUPPLY

Waste gate connector

Pin 8

Pin 1

J23

Secondary position connector

J1

Pin 57

Pin 25

Coolant temperature connector

Inlet air temperature connector

25 26 44 17

J1939 CAN DL -

Resistors optional 300 ohms (24V)

27

100 ohms (12V)

31

N/A PWM_2A Return N/A 1

32

PWM_2A Driver N/A 1

28

N/A

29

N/A N/A

30

N/A N/A

53 54

AIN_ACT/PWM_I 1PWM Throttle Input Throttle 1 Analogue Input AIN_ACT 7

Warning Lamp Shutdown Lamp Low Oil Pressure Lamp

Key switch Ignition warning light

THIS DIAGRAM IS FOR THE C6.6 INDUSTRIAL ENGINE(E797)