Caterpillar 950G and 962G Wheel Loader Electrical System Schematic Manual - PDF DOWNLOAD

Page 1

Connector Number

Schematic Location

Machine Location

CONN 1 B-15 43 CONN 2 C-15 54 CONN 3 C-15 2 CONN 4 D-14 44 CONN 5 A-13 5 CONN 6 Monitor Harness Code Plug H-9,13 C CONN 7 F-12 45 CONN 8 E-12 45 CONN 9 D-12 45 CONN 10 C-12 45 CONN 11 C-11 C CONN 12 HVAC Unit G-10 56 CONN 13 Service Tool Conn. F-1 0 C CONN 14 C-14 54 CONN 15 Service Mode Plug H-9 C CONN 16 E-8 57 CONN 17 E-8 57 CONN 18 D-8 57 CONN 19 D-8 57 CONN 20 Option Code Plug I-7 C CONN 21 F-6 A CONN 22 Xmsn Shifter G-4 A CONN 23 Customer Data Conn C-4 C CONN 24 B-4 D CONN 25 A-3 46 CONN 26 Service Brake Pedal B-3 45 CONN 27 C-3 58 CONN 28 E-3 A CONN 29 E-3 A CONN 30 G-2 47 CONN 31 F-2 60 CONN 32 F-2 60 CONN 33 C-2 48 CONN 34 G-1 49 CONN 35 G-1 49 CONN 36 I-1 50 ¹ The connectors shown in this chart are for harness to harness connectors. Connectors that join a harness to a component are generally located at or near the component. See the Component Location Chart.

53

48

25

18

42

4

34

8

22

6 10 15

3 9

2 28

54

36 7

17

30

41

58

56

14

32

47 50

33

11

21 13

5

20

43

A

26

27 37 29

51 B

44

45

12

35 23 31 39

E

C

38 D

57

1

40

59

46 19

55

49 52

24

16

D

B

59

22 27

3

11

9

17

5

13

21 10

54

25

4 40 1

24 58 46

34 16

42 18

26 48

6

20

28 7

35

41

57

44

15

51 50 12

8

36

55

C

43

29 37

53

56

45

30

52

A

E

2

47

49

31

32

23

38

19

14

39

33

Related Electrical Service Manuals Title

Form No.

Alternator: 107-7977

SENR4757

Caterpillar Monitoring System

SENR1394

Electric Starting Motor: 106-8558 Consist: 106-8557 Consist: 106-8559 Payload Control System

SENR3559 SENR3581 SENR6614

Power Train ECM

SENR1380

950G and 962G Wheel Loader Hyd. System System Operation Testing And Adjusting

SENR1389 SENR1390

Machine Harness Connector And Component Locations

Component Location Schematic Location

Part No.

Machine Location

Component

Schematic Location

Part No.

Machine Location

H-11

126-5611

56

Sensor - Tran Intermediate Speed Sensor 1

B-13

3E-8848

26

Actuator - Hood As.

A-14

124-4236

1

Sensor - Tran Intermediate Speed Sensor 2

B-13

3E-8848

26

Actuator - Water Valve

H-11

126-5610

56

Sensor - Tran Output Speed Sensor 1

C-13

3E-8848

26

Alarm - Action

D-10

3E-6328

C

Sensor - Tran Output Speed Sensor 2

B-13

3E-8848

26

Alarm - Backup

C-15

123-6449

2

Sensor - Trans Oil Temp

B-13

100-3055

26

Alternator

D-15

107-7977

3

Sensors - Aux Lever Pos

Arc Suppressor

F-10

106-8704

C

Solenoid - A/C Clutch

Batteries

F-15

115-2422

4

Breaker - Alt

A-15

9S-4693

5

Breaker - Hood

A-14

9H-1958

Breaker - Main

A-15

Breaker - Running Lamp

A-14

Breakers - 15A

Component Actuator - Blend Door

Monitoring System Mode Mode Of Operation

Mode Number

Normal

0

Harness Code

1

Parameter Display

2

Service

3

Tattletale

4

Units

5

Calibration

6,7,8

F-9

106-4437

E

B-15

106-5122

27

Solenoid - Aux Lever Lower

H-1

138-2924

31

Solenoid - Aux Lever Rearward

G-1

138-2924

31

5

Solenoid - Axle Oil Cooler Clutch Assy.

C-14

152-5409

28

9S-4693

5

Solenoid - Lift Linkage Lower

H-1

138-2924

31

3T-2662

5

Solenoid - Lift Linkage Raise

G- 1

138-2924

31

D- 1

6T-3643

C

Solenoid - Pilot Press Supply

G-1

129-4023

31

E-5

155-1516

A

Solenoid - Shutdown

C-15

8C-3663

29

Control - Implement

I-7

142-3371

C

Solenoid - Start Aid

F-14

3E-6332

30

Control - Power Train ECM

I-10

142-3363

57

Solenoid - Tilt Linkage Tiltback

G-1

138-2924

31

Control - Water Valve/Blend Door

G-11

128-8010

A

Solenoid - lilt Linkage Dump

H-1

138-2924

31

C-4

112-1572

59

Solenoid Valve - Dual HP

B-15

129-7707

27

Converter - Voltage

H-5

119-1733

B

Solenoid Valve - Ride Control

G-1

3E-8574

31

Dimmer - Control

E-11

103-5526

C

Solenoids - Clutch Modulating Valve

C-13

121-4298

26

Fuses

A-14

3K-8782

5

Stud -Terminal

D-11

9G-8451

C

Fuses - 10A

D-11

3K-8782

C

Suppressor - Arc

B-2

106-8704

32

Fuses - 15A

D-11

8M-8948

C

Suppressor - Arc A/C

B-15

106-8704

27

E-4

100-5895

A

Suppressors - Arc

E-6

106-8704

A

Control - Cat Monitoring System

Control - WLPCS ECM

Gauge - Quad

Machine Codes Sales Model

Machine Code

950G

7,13, 15, 38

962G

14

Ground - Cab

A-8

D

Switch - A/C Refrigerant

B-15

114-5333

27

Ground - Cab

F-10

57

Switch - AIH

G-5

112-6169

A

Ground - Cab

H-8

57

Switch - Auto Ride Control

B-S

103-6333

D

Ground - Cab

H-10

57

Switch - Auto/Manual

B-6

123-6383

D

Ground - Left Frame Boss

E-14

6

Switch - Axle Oil Cooler

C-14

155-8998

33

Ground - Right Rear Frame

A-15

7

Switch - Beacon

B-9

9X-9639

D

Ground - Steer Column

E-5

A

Switch - Blower

B-9

3E-7156

D

8

Switch - Brake Oil Pressure

H-2

3E-7693

34 35

Ground - Strap Frame to Cab

G-12

Ground - To Engine

D-15

9

Switch - Bucket Positioner

I-1

117-1324

Ground - To Engine Block

D-14

10

Switch - Bucket/Fork Select

G-7

135-9968

B

Ground - To Engine Cyl Head

D-14

11

Switch - Dimmer

B-3

2H-1855

58

Heater - Air Inlet

D-14

107-9652

11

Switch - Disconnect

B-15

7N-0718

36

Horn - Forward

F-3

4Y-7882

12

Switch - Downshift

G-5

152-5707

A

Horn - Forward

H-1

7T-0970

12

Switch - Engine Oil

C-15

3E-6455

37

Horn - Forward

I-1

7T-0970

12

Switch - Forw/Neut/Rev

G-5

152-5707

A

Horns - Forward

F-2

7T-0970

12

Switch - Forward Horn

G-4

21-3360

A

Keypad - WLPCS

B-4

129-0419

59

Switch - Front Axle Temp

F-1

155-8999

39

Motor - Actuator

A-14

117-1557

1

Switch - Front Wiper

B-4

110-7886

0

Motor - Blower

Payload Control Fault Codes Fault Battery Voltage Too High Battery Voltage Too low PCS Not Calibrated Position Sensor Out of Range Loss of Position Sensor Signal Pressure Sensor Out of Range Loss of Pressure Sensor Signal Pressure Sensor Out of Range Loss of Pressure Sensor Signal Backup Battery Error Real Time Clock Not Running Loss Of Keypad Data Link

8X-5804

Wire Number

Wire Color

101 102 105 108 109 112 113 114 118 120 122 123 124 126 127 128 129 130 133 134 135 136 138 144 146 158 167 175 177 188

RD RD RD BU RD PU OR GN GY YL BU WH GN PK OR PK BU RD OR YL BU GN GN GN GY BR OR PK OR WH

200 201 202 250 251 270 271 272 273 274 275 290 291 299 A201 A202 A203 A204 A205 A219 A251 A272 A273

BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK

301 304 306 307 308 310 311 321 322 326 334 373 397 398 A300 A301

BU WH GN OR YL PU WH BR GY PU BU GN OR BU GN WH

403 405 410 411 416 417 419 432 441 442 443 447 450 453 484 496 499 C413 C414 E416 G454 G485 G486

GN GY WH PK OR GY YL PK OR GY YL PK YL PK YL WH GY YL BU PU PK BU GN

500 501 502 503 504 505 506 507 508 509 511 512 513 515 516 517 518 521 522 537 538 539 540 A513 A523 A524 A525 A526 A527 A528

BR GN OR BR YL BU PU WH PU WH BR GN OR GY GN BU OR YL WH GN BR BU WH PK PU BR GN PK BU BR

Description Power Circuits Bat (+) (Not Application Specific) HdLmp Key Start Sw Aux Ckt Alt Output (+) Term. Main Power Rly Output Opr Mon Panel VMIS B+ Switched Warning Horn (Forward) Aux Ckt Aux Ckt Aux Ckt Aux Ckt A/C Xmsn Ctrl Aux Ckt Aux Ckt Aux Ckt Aux Ckt Aux Ckt Aux Ckt Aux Ckt Sec Ster Auto Lube Pump To Payload Mon Aux Ckt Aux Ckt Aux Ckt Aux Ckt Aux Ckt Main Brkr Aux Ckt Ground Circuits Main Chassis Operator Monitor Return XMSN Ctrl Payload Mon - Customer Gnd Payload Mon - System Gnd CMS Ident Code 0 CMS Ident Code 1 CMS Ident Code 2 CMS Ident Code 3 CMS Ident Code 4 CMS Ident Code 5 CMS Service CMS Clear WTL Impl Ctrl Gnd WTL Impl Ctrl Serv Mode SW to GND WTL Impl Ctrl Clear Fault SW to GND WTL Impl Ctrl ID Code 3 WTL Impl Ctrl ID Code 4 WTL Impl Ctrl ID Code 5 ETAC Ctrl Gnd VIMS Ser Mode #1 MAC-14 Impl Ctrl B MAC-1 4 Trans Ctrl BBasic Machine Circuits Starter No. 1 Sol Starter Relay No. 1 Output Starter Relay Coil To Neut Start SW Or Key Start SW Key Start SW To Neutral Start SW Or VMIS Sensor Module Main Power Relay Coil Start Aid SW To Start Aid Sol Start Aid Sol To Temp SW Backup Alarm Lamp Travel Alarm Warning Horn (Forward) Key Start SW "C" Term. Start Aid Sol #2 Start Aid Switch To Timer Hood Raise Motor Hood Raise Motor Hood Raise Relay Coil Hood Raise Relay Coil Monitoring Circuits Alternator (R) Term. Opr Mon Oil Press. (Low Setting) Opr Mon Action Alarm Opr Mon Master Sec Ster SW Primary Ster SW Opr Mon Parking Brake Opr Mon Brake Press. (Oil) Eng Coolant Temp Gauge Hyd System Temp Gauge Power Train Temp Gauge Fuel Level Gauge Tach Sender (+) Sec Ster Action Lamp Primary Ster Lamp Opr Mon Panel Hyd Oil Level Opr Mon Implement Oil Filter VMIS Display Data VMIS Display Load PMS Lift Cyl Press Sensor Pump Drive Oil Temp Opr Mon Front Brake Temperature Opr Mon Rear Brake Temperature Accessory Circuits Wiper - Front (Park) Wiper - Front (Low) Wiper - Front (HI) Wiper - Rear (Park) Wiper - Rear (Low) Wiper - Rear (HI) Washer - Front Washer - Rear Radio Speaker - Left Radio Speaker - Left (Common) Radio Speaker - Right Radio Speaker - Right (Common) A/C Compressor/Refrigerant Pressure SW Blower Motor (HI) Blower Motor (Medium) Blower Motor (Low) Hazard Flasher To SW A/C SW To Refrigerant SW A/C Clutch To Thermostat SW Turn Signal SW To Flasher Hazard Indicator Turn Signal Indicator Basic/Right Turn Signal Indicator Left DC/DC Converter Memory Output Temp Potentiometer Pos 1 Temp Potentiometer Pos 2 Temp Potentiometer Pos 3 Electronic Water Valve Actuator Electronic Water Valve Actuator Electronic Water Valve Actuator

Part No.

Function

Actuate

3E-6392

56

Switch - Function Select

F-9

116-4509

E

147-7973

A

Switch - Hazard lamp

G-9

112-6167

B

Motor - Priming Pump

B-14

151-6351

13

Switch - Hood Actuator

A-14

146-0204

40

Motor- Rear Wiper

F-10

137-8709

C

Switch - Hyd Filter Bypass

A-3

7X-8549

16

Motor - Sec Steer

B-2

154-2563

19

Switch - Hyd Oil Level

A-2

123-2993

19

D-14

106-8558

15

Switch - Implement Lockout

F-8

116-4502

E

Motors - Washers

A-3

7T-8890

16

Switch - Key Start

D-5

9G-7641

A

Relay - AIH Magnetic Switch

B-14

3E-0075

17

Switch - Kickout On/Off

G-8

116-4506

B

Relay - Backup Lamp

I-15

4Y-6135

25

Switch - Park Brake Oil Pressure

H-2

3E-6452

42

Relay - Front Flood

E-10

3E-5239

C

Switch - Primary Steer

B-2

3E-6450

14

Relay - Hood Raise Lower

A-13

149-2612

5

Switch - Rear Axle Temp

C-14

155-8499

33

Relay - Main

B-15

101-7740

5

Switch - Rear Wiper

C-9

112-6174

D

Relay - Rear Flood

E-11

3E-5239

C

Switch - Run/Work/Panel/Tail

C-8

108-3320

D

Part No.

Relay - Sec Steer

B-2

139-2599

14

Switch - Sec Steer Test

H-8

143-3001

B

3E-6332

Solenoid Valve - Start Aid

Relay - Sec Steering Intermediate

F-11

3E-5239

C

Switch - Secondary Steer

B-2

3E-6450

14

Relay - Start Magnetic Switch

B-14

125-1302

5

Switch - Selector AC/Heat

B-9

3E-71 55

D

3E-8574

Solenoid Valve - Ride Control

Resistor - Blower

G-11

9G-1950

56

Switch - Service Brake Pedal As.

B-3

110-8029

58

3E-9366

Solenoid - Bucket Lift Lever Lower Detent

Sender - Fuel Level

H-2

152-7248

18

Switch - Start Aid

G-5

3E-71 76

A

Sender - Hyd Temp

A-3

4W-9972

19

Switch - Start Aid Coolant

D-15

3E-6449

22

4W-9972

Sender - Hydraulic Oil Temperature

8C-3663

Solenoid - Engine Shutdown

B-14

4W-9972

20

Switch - Tach/Speedo/Serv Meter

G-5

112-6171

A

D-15

131-0427

22

Switch - Temp Selector

B-9

127-4540

D

Sensor - Engine Speed

B-14

6V-2455

21

Switch - Thermostat

G-11

3E-5464

56

Sensor - Lift Cyl Head End Press

G-1

124-4672

23

Switch - Tran Neutralizer Override

B-5

112-6156

D

Sensor - Lift Lever

F-7

106-4437

E

Switch - Turn Signal

F-6

134-9569

A

Sensor - Lift Linkage Rotary Position

I-1

121-0284

24

Switch - Upshift

G-5

152-5709

A

F-7

106-4437

E

Tach/Speedometer

E-4

100-5888

A

B-13

3E-8848

26

Terminal Block

A-14

121-1023

5

Sensor - Tilt Lever Pos Sensor - Torque Cony Output Speed

Machine locations are repeated for components located close together. A = Operator Compartment - Dash Console B = Operator Compartment - Left Overhead Console C = Operator Compartment - Relay/Fuse Panel D = Operator Compartment - Right Overhead Console E = Operator Compartment - Right Console

A541 A592 A593 A594 A595 A596 C529 C530

PU BU OR WH GN YL GY BU

603 604 605 606 608 610 611 612 614 615 617 619 633 646 647 661 662 663 691 692

PK OR YL GY GN OR PU GY PU YL BR GN BU OR GN GN YL GY GY YL

709 720 727 728 751 752 754 755 761 762 795 E701 E702 E707 E708 E735 F781 F783 F784 F785 F793 G728 G750 G755 G760 G761 G762 G763 G764 G766 G767 G768 G785 H708 H709 H710 H711 H713 H714 H715 H716 H717 H719 H720 H728 818 819 900 901 910 944 945 961 964 973 975 976 977 E900 E901 E902 E903 E904 E905 E906 E907 E908 E909 E917 E918 E919 E920 E922 E923 E924 E925 E926 E927 E928 E930 E932 E933 E936 E955 G939 G940 G941 G942 G943 G944 G947 G954 K933 K977 N939 P910

OR PU GN BU GN YL BU OR GY YL YL PK OR GN PK PU BR GN YL WH OR YL BU GY WH YL BR PU PK GN WH GN OR OR BU PK GN PK OR PU WH BR OR BU GN BR GY PU WH YL OR BR BR BU BR WH OR YL WH GN PU YL BR BU OR GY BR WH WH GN YL BR GN PK YL OR BU GN WH BU PK YL WH OR PK PU GY OR BU YL WH GN GN PK GN BR

Description Accessory Circuits (Continued) Flasher To Indicator Lights Blend Door Motor (A) Blend Door Motor (B) Blend Door Position Feedback (+) Blend Door Position Feedback (Signal) Blend Door Position Feedback (-) Lift Press Sensor (WAS B413) Lift Position Sensor (WAS B412) Lighting Circuits Rotary Beacon Stop Lamp Turn Lamp - Left Turn Lamp - Right Flood Lamp - Rear Head Lamp Basic Head Lamp Hi Backup Lamp Park/Tail/Dash/Lamp Cab Flood Lamp/Rops Tail/Position Lamp - Left (Road Pkg)/ Width Head Lamp Lo Attach Lighting Ckt Light SW To Front Flood Relay Light SW To Rear Flood Relay Tachometer Lamp - Smart EMS Speedometer Lamp - Smart EMS Gauge Lamps - Smart EMS Warning Lights To Bkr Flasher Bkr To Flasher Control Circuits Sensor Power Supply XMSN Brake SW Sec Ster Motor Relay Sec Ster Cont SW XMSN Shift Sol No. 1 Or 3 XMSN Shift Sol No. 2 XMSN Shift Sol No. 3 Or 1 XMSN Shift Sol No. 4 Or 5 Lift Kickout Sol SW Bucket Positioner Sol SW Dual Hp Sol Auto Ride Cntl SW Auto Ride Cntl SW VMIS Display +V VMIS Display Clock Smart Ems Tack/Serv Mtr/Odometer Select Downshift SW (N.O.) Upshift SW (N.C.) Downshift SW (NC.) Upshift SW (NO.) Air Inlet Heater Relay SW To SW (Generic) XMSN Cont Fwd SW To Gnd XMSN Cont Rev SW To Gnd XMSN Cont Speed 2 SW To Gnd XMSN Cont Speed 3 SW To Gnd XMSN Cont Speed 4 SW To Gnd XMSN Cont Neut SW To Gnd XMSN Cont Pk Brk Lever SW To Gnd Impl Cont SW To Gnd NO. Impl Cont SW To Gnd N.C. XMSN Cont Speed 1 SW To Gnd Injector Diode To Injector 14 Impl Coot Kickout SW 1 Impl Corn Kickout SW 2 Impl Cont Lift Lever Position Impl Cont Tilt Lever Position Impl Cont Lift Proportional Sol Impl Cont Lower Proportional Sol Impl Cont Lower Kickout Sol Impl Cont Sol Return Impl Cont Pilot Press Sol Impl Cont Lift Kickout Sol Impl Cont Bucket Positioner Sol Auto SW 3 Serial Data (Transmit) Serial Data (Receive) XMSN Shift Sol No. 5 or 4 XMSN Shift Sol No. 6 XMSN Neutizer Override Indicator Data Link + (CAT) Data Link - (CAT) Selector SW Fork Position Select CST Autoshift- Auto/Manual SW 2 CST Autoshift- Sol Return Ride Cont Solenoid 1 CST Autoshift- Auto/Manual SW 1 ECPC Trans Output SPD + ECPC Trans Output SPD ECPC Trans Intermediate SPD + ECPC Trans Intermediate SPD ECPC Trans Intermediate SPD Q+ ECPC Trans Intermediate SPD QECPC Trans Output SPD Q+ ECPC Trans Output SPD QECPC Trans Input SPD + ECPC Trans Input SPD Impl Lockout SW to GND (N.O.) Impl Lockout SW to GND (N.C.) AUX Lower Proportional Sol AUX Lift Proportional Sol Dump Proportional Solenoid ETAC Front Left Wheel Proportional Solenoid ETAC Front Right Wheel Proportional Solenoid ETAC Rear Left Wheel Proportional Solenoid ETAC Rear Right Wheel Proportional Solenoid ETAC Test Mode SW (N/C) ETAC Test Mode SW (N/O) ETAC Front Axle Pilot Solenoid ETAC Front Left Wheel Speed Sensor ETAC Front Right Wheel Speed Sensor ETAC Solenoid Return WLPMS PHII Keypad Data MAC14 Switch Return Impl 4th Func Lift Prop Sol Impl 4th Func Lower Prop Sol Impl 3rd Lever Pos Sensor Impl Function Sel SW (NO.) Impl Function Sel SW (N.C.) Impl 4th Lever Pos Sensor Dual Low Idle Sol Stick 2 Bypass Sol ECPC Trans Oil Temp Sensor Ride Control Solenoid 2 Secondary Steering Test Sw Input

Deactuate

Contact Position

Start Aid Coolant (Temperature)

D-5

Sensor - Coolant Temp

Wire Color

38 ± 3°C 27°C MIN Normally Closed (100 ± 5°F) (80.6°F) Primary Steering Oil Pressure 1200 kPa MAX 700 ± 100 kPa A-C, Normally Closed 3E-6450 Secondary Steering Oil Pressure (175 psi MAX) (100 ± 15 psi) A-B, Normally Open 8270 kPa MAX 6890 ± 345 kPa A-C, Normally Closed 3E-6452 Park Brake Oil Pressure (1200 psi MAX) (1000 ± 50 psi) A-B, Normally Open 10700 kPa MAX 8960 ± 345 kPa A-B, Normally Open 3E-7693 Service Brake Oil Pressure (1550 psi MAX) (1300 ± 50 psi) A-C, Normally Closed 275 to 1750 kPa ¹ 114-5333 Refrigerant Pressure (AC) Normally Open ² (40 to 255 psi) 13.0°C 21.0 ± 3.0°C 123-2993 Hydraulic Oil Level Normally Closed (69.8 ± 5.4°F) (55.4 °F) 65 °C ± 3 58 °C 155-8998 Axle Oil Cooler Temperature Normally Closed (149.0 °F) (136.4 °F) Min Rear Axle Temperature 125 °C ± 3 117 °C Min 155-8999 Normally Closed Front Axle Temperature (257.0 °F) (242.6 °F) Min ¹ A hysteresis band exists: with increasing pressure the closed condition can be maintained up to 2800 kpa (405 psi), with decreasing pressure the closed condition can be maintained down to 170 kPa (25psi). ² Contact position at the contacts of the harness connector. 3E-6449

G-11

Sender - Torque Converter Oil Temp

Wire Number

Off Machine Switch Specification

Motor - Front Wiper

Motor - Starter

Code 16800 16801 25413 35001 35002 36401 36402 76901 76902 81704 81708 82002

RENR 2140-01 December 2002

Wire Description Chart

Connector Location ¹

Resistor, Sender and Solenoid Specifications Component

Resistance (Ohms)¹ 6.0 34.3 ± 1.7 53.3 ± 2.7 54°C (130°F) - 560 to 716

110°C (230°F) -72 to 82 1.55 ± 0.15 10.3 ± 1.03 Overall 2.0 ± .1; Tap 1.0 ± .05

9G-1950

Resistor - A/C, Heater Blower Motor

106-5122

Solenoid - A/C Clutch

17.6 ±0.6

121-4298

Solenoid - Clutch Modulating Valves

7.75 ± 1.0

129-7707

Solenoid - Dual HP

31.1 ± 2.4

152-5409

Solenoid - Axle Oil Cooler

¹ At room temperature unless otherwise noted.

9.4 ± 5

T

Temperature Symbol

Pressure Symbol

Flow Symbol

Level Symbol

Normally open switch that will close with an increase of a specific condition (temp-press-etc.). Normally open switch that is closed due to an applied condition, and will open again with a specific decrease in that condition.

Normally closed switch that will open with an increase of a specific condition.

950G Wheel Loader and 962G Wheel Loader Electrical System 2JS1-1499 3BS1-799 4BS1-706 5AS1-400

Normally closed switch that is open due to an applied condition, and will close again with a specific decrease in that condition.

The circle indicates that the component has screw terminals and a wire can be disconnected from it.

5RS1-402 6NS1-399

No circle indicates that the wire cannot be disconnected from the component.

This indicates that the component has a wire connected to it that is connected to ground.

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

Machines Equipped with Electro-Hydraulics (E/H) and Command Contol Steering (CCS) Printed in U.S.A.

© 2002 Caterpillar All Rights Reserved

Harness And Wire Electrical Schematic Symbols Component Identifiers (CID¹) and Module Identifier (MID²) For Power Train ECM (MID No. 081) CID

0041 0070 0149 0168 0177 0190 0270 0363 0367 0368 0444 0562 0582 0617 0621 0622 0623 0631 0632 0633 0634 0635 0636 0668 0672 0673 0674 0675 0688 0793 0794 0795

Component

+8 Volts Sensor Supply Parking Brake Switch Ride Control Solenoid #2 Electrical System Voltage Transmission Oil Temperature Sensor Engine Speed Sensor Cat Monitor System Harness Code Ride Control Solenoid Ride Control Switch Transmission AUTO/MAN Switch Start Relay Unable To Communicate With Cat Monitor System Transmission Output Speed Sensor 1 Air Heater Relay Downshift Switch Up Shift Switch Direction Switch Transmission Clutch #1 Solenoid Transmission Clutch #2 Solenoid Transmission Clutch Solenoid #3 Transmission Clutch Solenoid #4 Transmission Clutch Solenoid #5 Transmission Clutch Solenoid #6 Transmission Shift Lever Torque Converter Output Speed Sensor Transmission Output Speed Sensor Transmission Intermediate Speed Sensor 1 Transmission Intermediate Speed Sensor 2 Variable Horsepower Solenoid Primary Steering Pressure Switch Secondary Steering Pressure Switch Secondary Steering Intermediate Relay

Component Identifiers (CID¹) and Module Identifier (MID²) For Caterpillar Monitoring System (MID No. 030) CID

Component

0084 Ground Speed Sensor 0096 Fuel Level Sensor 0100 Engine Oil Pressure Sensor 0110 Engine Coolant Temperature Sensor 0177 Torque Converter Oil Temperature Sensor 0248 Data Link 0263 8 Volt Sensor Power Supply 0271 Action Alarm 0324 Action Lamp 0523 Engine Speed Sensor 0600 Hydraulic Oil Temperature Sensor 0601 Brake Air Pressure Sensor 0819 Display Data Link 0821 9 Volt Display Power Supply 0830 Brake Oil Temperature Sensor ¹ The CID is a diagnostic code that indicates which component is faulty. ² The MID is a diagnostic code that indicates which electronic control module diagnosed the fault.

A

Component Identifiers (CID¹) and Module Identifier (MID²) For Implement ECM (MID No. 082) CID

Component

0168 Electrical System Voltage 0248 Data Link 0270 Caterpillar Monitoring System Harness Code 0296 Powertrain Electronic Control Module 0350 Rotary Position Sensor (Lift Linkage) 0352 Position Sensor (Lift Lever) 0353 Position Sensor (Tilt Lever) 0354 Solenoid Valve (Lift Linkage Raise) 0355 Solenoid Valve (Lift Linkage Lower) 0356 Solenoid Valve (Lift Linkage Dump) 0357 Solenoid Valve (Tilt Linkage Tiltback) 0358 Solenoid Valve (Pilot Pressure Supply) 0359 Detent Coil (Lift Lever Raise) 0360 Detent Coil (Lift Lever Lower) 0361 Detent Coil (Tilt Lever Tiltback) 0365 Switch (Kickout Set) 0487 Position Sensor (Auxiliary Lever) 0489 Switch (Function Select) 0490 Switch (implement Lockout) 0491 Solenoid Valve (Auxiliary Lever Forward) 0492 Solenoid Valve (Auxiliary Lever Rearward) 0596 Harness Code incorrect 0687 Option Code incorrect ¹ The CID is a diagnostic code that indicates which component is faulty. ² The MID is a diagnostic code that indicates which electronic control module diagnosed the fault.

AA

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

Receptacle

Plug

1 2

1 2

1

2

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

Pin or Socket Number Wire, Cable, or Harness Assembly Identification

Component Part Number

Single Wire Connector C

A

A 325-PK-14

Pin

AA 1

9X-1123 325-PK-14

Wire Color

Socket

2

200-BK-14

Circuit Number Identification

Failure Mode Identifiers (FMI)¹ FMI No.

Electrical Schematic Symbols And Definitions

Failure Description

0 Data valid but above normal operational range. 1 Data valid but below normal operational range. 2 Data erratic, intermittent, or incorrect. 3 Voltage above normal or shorted high. 4 Voltage below normal or shorted low. 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. 11 Failure mode not identifiable. 12 Bad device or component. 13 Out of calibration. 14 Parameter failures. 15 Parameter failures. 16 Parameter not available. 17 Module not responding. 18 Sensor supply fault. 19 Condition not met. 20 Parameter failures. ¹The FMI is a diagnostic code that indicates what type of failure has occurred.

Wire Gauge

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

T

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. 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. CIRCUIT BREAKER (C/B) - A component in an electrical circuit that will open the circuit if too much current flows through it. This does not destroy the circuit breaker and it can be reset to become part of the circuit again. 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. MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is activated by electricity and held latch 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.


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