SENR8412-02 December 2001
MACHINE HARNESS CONNECTOR AND COMPONENT LOCATIONS
Module Identifiers (MID)
MID No.
Connector Number
Module
30 79
Caterpillar Monitoring System Electronic Hydrostatic Control
10 3
18
2
19
5
7 9 4 20
25
C
23
6
16 13 22
12
A
D
8
11
15
14
17
24
1
21 18
Component Identifiers (CID) List
CID No.
Connector Location
E
Component
26
B
23
Fuel Level Sensor Engine Coolant Temperature Sensor Torque Converter Oil Temperature Sensor CAT Data Link 8 Volt Sensor Power Supply Action Alarm Action Lamp Hydraulic Oil Temperature Sensor Brake Air Pressure Display Data Link 9 Volt Display Power Supply Brake Oil Temperature
070 110 168 190 269 296 299 349 358 463 464 465 466 467 468 469 470 471 472 473 617 650 681
Parking Brake Switch Engine Coolant Temperature Sensor Electrical System Voltage Engine RPM Sensor Sensor Supply Voltage Electronic Control Module Transmission Lever Position Sensor Transmission Sync Solenoid Pilot Pressure Supply Actuator Implement Dual Pressure Relief Solenoid Implement Tilt Lever Position Switch Governor Control Lever Switch Left Track Steering Pedal Position Sensor Right Track Steering Pedal Position Sensor Service Brake Pedal Position Switch Left Track Forward Direction Solenoid Left Track Reverse Direction Solenoid Right Track Forward Direction Solenoid Right Track Reverse Direction Solenoid Charge Pressure Sensor Air Inlet Heater Relay Harness Code Parking Brake Solenoid
Schematic Location
Machine Location
CONN 1 Caterpillar Monitoring System Harness Code
C-2
A
CONN 2
D-4
27
CONN 3
B-4
8
CONN 4
B-5
9
CONN 5 EHC Harness Code
A-5
E
CONN 6 Service Tool
A-5
E
CONN 7
C-5
16
CONN 8
B-6
E
CONN 9
C-7
19
CONN 10
C-7
19
CONN 11
C-7
19
CONN 12
C-7
19
CONN 13
C-7
19
CONN 14
D-8
1
Wire Number
Wire Color
101 102 105 109 112 113 114 116 118 124 128 129 158 160 164
RD BU BR OR PU OR GN BR GY GN PK BU BR PU WH
200 201 202 260 261 262 263 270 271 272 273 274 275 290 291
BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK
301 304 306 308 310 311 321 322 326
BU WH GN YL PU WH BR GY PU
403 405 410 411 419 441 442 443 447 C413 C414
GN GY WH PK YL OR GY YL PK YL BU
500 501 502 503
BR GN OR BR
1The
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.
Caterpillar Monitoring System (MID No. 30)
096 110 177 248 263 271 324 600 601 819 821 830
1
953C Track Loader Electrical System MACHINE: 2ZN1-1749
Electronic Hydrostatic Control (MID No. 79) D
9
11
Related Electrical Service Manuals
25
Title
12
A
8 E
15
26 21
3 24
1
5
22
16
10
SENR4757
Caterpillar Monitoring System
SEN R6717
Electronic Hydrostatic Transmission Control
SENR8314
Starting Motor: (104-7040) Consist: 6V-5720 Consist: 106-8557
13
19
20
2
6
23
7
4
B
C
Form Number
Alternator: (107-7977)
SENR3581 SENR3859
17 23
14
18
Wire Description Description Power Circuits
Wire Number
Wire Color
504 505 506 507 508 509 511 512 513 515 516 517 521 522 592 A513
YL BU PU WH PU WH BR GN OR GY GN BU YL WH BU PK
600 610 615 663
BR OR YL GY
761 762 799 C744 E707 E708 E735 F743 F780 F793 F794 F795 F796 822 828 829 830 831 836 837 843 844 848 849 850 851 852 892 893 F842 975 E900 E901 E902 E903 G939 K997
GY YL WH PU GN PK PU GY PK OR BU YL GY PK WH GN OR PK WH GN WH GN GY YL PU WH GN BR GN BU WH WH GN PU YL PK BU
Bat (+) Hd Lmp Key Sw Alt Output (+) Term. Main Power Rly Output Opr Mon Panel B (+) Switched Warning Horn (Forward) Aux Ckt Aux Ckt A/C Aux Ckt Aux Ckt Aux Ckt Aux Ckt Hydro Ctrl Ground Circuits Main Chassis Operator Monitor Return XMSN Ctrl TEHC Ident Code 0 TEHC Ident Code 1 TEHC Ident Code 2 TEHC Ident Code 3 CAT Mon Sys Ident Code 0 CAT Mon Sys Ident Code 1 CAT Mon Sys Ident Code 2 CAT Mon Sys Ident Code 3 CAT Mon Sys Ident Code 4 CAT Mon Sys Ident Code 5 CAT Mon Sys Service CAT Mon Sys Clear Basic Machine Circuits Starter No. 1 Sol Starter Relay No. 1 Output Starter Relay Coil Main Power Relay Coil Start Aid SW To Start Aid Sol Start Aid Sol To Temp SW Bckp Alarm Warning Horn (Forward) Key SW "C" Term. Monitoring Circuits Alternator (R) Term. Opr Mon Oil Press. (Low Setting) Opr Mon Action Alarm Opr Mon Master Opr Mon Parking Brake Eng Coolant Temp Gauge Hyd System Temp Gauge Power Train Temp Gauge Fuel Level Gauge Display Data Display Load Accessory Circuits Wiper - Front (Park) Wiper - Front (Low) Wiper - Front (HI) Wiper - Rear (Park)
Description Accessory Circuits (Continued) Wiper - Rear (Low) Wiper - Rear (HI) Washer - Front Washer - Rear Radio Speaker - Left Radio Speaker - Left (Commom) Radio Speaker - Right Radio Speaker - Right (Common) A/C Compressor/Refrigerant Pressure SW Blower Motor (HI) Blower Motor (Medium) Blower Motor (Low) A/C SW To Refrigerant SW A/C Clutch To Thermostat SW DC/DC Converter Power Output DC/DC Converter Memory Output Lighting Circuits Dash Lamp Basic Head Lamp Basic Cab Flood Lamp/Rops Gauge Lamps - CAT Mon Sys Control Circuits Lift Kickout Sol SW Bucket Positioner Sol SW Sensor Power Parking Brake - Sol To SW Display +V Display Clock CAT Mon Sys Tack/Serv Mtr/Odometer Select Impl Lift Prop Sol 2 Parking Brake SW Air Inlet Heater Relay Lift SW (N.C.) Lift SW (N.O.) Engine Speed Forward Hydrst Sync Sol Hydrst Left Ster Pedal Sensor Hydrst Pedal Sensor Hydrst Right Ster Pedal Sensor Hydrst Eng Speed Sensor Hydrst Throttle N/O SW Hydrst Throttle N/C SW Hydrst Left Pump Forward Sol Hydrst Left Pump Reverse Sol Hydrst Speed Reverse Sol Hydrst Right Pump Reverse Sol Hydrst Right Pump Forward Sol Hydrst Speed and Direction Sensor Hydrst Charge Press. Sensor CAT Data Link (-) CAT Data Link (+) AIH Post Heat Sol Return Trans Output SPD (+) Trans Output SPD (-) Trans Intermediate SPD (+) Trans Intermediate SPD (-) Hydro Control Switch Return (+) V Sensor, CAT Mon Sys
Printed in U.S.A.
© 2001 Caterpillar All Rights Reserved
Harness And Wire Electrical Schematic Symbols
FMI No.
Failure Mode Identifiers (FMI) List Alarm - Action Alarm - Backup
C-8
1
Sensor - Center Pedal
B-2
15
Part No.
2
Sensor - Charge Pressure
C-5
16
3E-6449
Component
Failure Description
A
Component Location
Schematic Location D-4
Machine Location A
Component Sender - Transmission Oil Temp
Schematic Location B-7
Machine Location 14
Off Machine Switch Specification
0
Data valid but above normal operational range.
1
Data valid but below normal operational range.
2
Data erratic, intermittent, or incorrect.
Alternator
D-8
3
Voltage above normal or shorted high.
Batteries
D-8
3
Sensor - Coolant Temp
C-8
2
4
Voltage below normal or shorted low.
5
Current below normal or open circuit.
Breaker - Alt
A-6
E
Sensor - Hydraulic Oil Temp
C-1
17
6
Current above normal or grounded circuit.
Caterpillar Monitoring System
A-2
A
Sensor - Left Steering Pedal
B-2
15
7
Mechanical system not responding properly.
Control - Electronic Hydrostatic
A-5
E
Sensor - Right Steering Pedal
B-2
15
8
Abnormal frequency, pulse width, or period.
Converter
B-2
D
Sensor-RPM
A-6
18
9
Abnormal update.
Diode - Arc Suppressor
B-8
4
Sensor - RPM
C-6
18
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).
10
Abnormal rate of change.
Fuses
A-7
E
Sensor - Speed/Direction
D-3
19
11
Failure mode not identifiable.
Gauge Cluster
D-2
A
Solenoid - A/C Clutch
B-8
4
² Contact position at the contacts of the harness connector.
12
Bad device or component.
13
Out of calibration.
Ground - Cab Roof
C-4
D
Solenoid - Engine Shutdown
B-8
20
Ground - Dash
C-2
A
Solenoid - Left Forward
C-5
16
Ground - Engine
D-7
5
Solenoid - Left Rev
C-5
16
Ground -Engine
D-8
2
Solenoid - Override
C-5
16
Ground - Engine
D-8
2
Solenoid - Park Brake
C-5
16
Monitoring System Modes
Function
Actuate
Deactuate
Contact Position
Start Aid Temperature
38 ± 3.0°C (100.4 ± 5.4°F)
27.0°C (80.6°F)
Normally Closed
3E-7692
Engine Oil Press
113.0kPa MAX (16.4psi MAX)
70.0 ± 20.0kPa (10.2 ± 2.9psi)
Normally Open
114-5333
Refrigerant Pressure (AC)
275 to 1750kPa¹ (40 to 255psi)
-
2
Pressure Symbol
Level Symbol
Flow Symbol
325-PK-14
Pin
6
Solenoid - Right Forward
C-5
16
C-7
3
Solenoid - Right Rev
C-5
16
Normal
0
Ground - Left Frame
D-7
3
Solenoid - Start Aid
D-7
21
Harness Code
1
Ground - Platform
D-2
6
Solenoid - Sync
C-5
22
Parameter Display
2
Ground - Rear Frame
D-7
3
Solenoid - Two Level Lift Relief
C-1
17
Service
3
Heater - Air Inlet
D-7
7
Switch - A/C High/Low
B-8
4
Part No.
Tattletale
4
Horn - Forward
D-1
6
Switch - Air Inlet Heater
C-2
A
9G-1950
Resistor - A/C Motor
Overall 2.0 ± .1; Tap 1.0 ± .05
Electronic Hydrostatic Control
5
Lamp - Action
B-2
A
Switch - Blower
B-4
B
Lighter - Cigar
B-2
A
Switch - Clear
A-4
23
116-6203
Resistor - Dimming
20 ± 1
Motor - Blower
B-5
8
Switch - Disconnect
D-8
21
101-1759
Solenoid - A/C Clutch
14.4 ± 0.6
Motor - Condenser
B-5
9
Switch - Engine Oil
B-7
24
Motor - Front Washer
D-4
10
Switch - Forward Horn
C-3
C
8C-3663
1.55 ± 0.15 10.3 ± 1.03
Motor - Front Wiper
D-4
11
Switch - Front Wiper
C-4
25
Solenoid - Engine Shutdown Start (Latch) Coil Stop (Unlatch) Coil
Motor - Rear Washer
D-4
10
Switch - Governor Lever
C-2
C
Motor - Rear Wiper
D-4
12
Switch - Key Start
B-2
A
Motor - Starter
D-7
5
Switch - Lamp
C-2
A
130-3310
7.75 ± 1.00
Radio
B-2
D
Switch - Operator/Start Aid
C-2
A
Solenoid - Left Forward Left Reverse Right Forward Right Reverse Override
Relay - Air Inlet Heater
D-7
7
Switch - Rear Wiper
C-4
25
Relay - Main
A-7
E
Switch - Sensor/Speed Cal
A-4
23
116-4152
Solenoid - Park Brake
34.3 ± 1.7
Relay - Start
A-6
E
Switch - Service
A-4
23
3E-6332
Solenoid - Start Aid
6.0
Relay Assembly
B-5
9
Switch - Start Aid Temp
C-8
2
130-6913
Solenoid - Sync
33.6
Resistor - Blower Motor
B-5
8
Switch - Thermostat
B-S
8
3E-8574
Solenoid - Two Level Lift Relief
Resistor - Dimming
D-2
A
Switch - Tilt Lever
A-3
B
Sender - Engine Speed
B-7
5
Switch - Transmission Control Brake
D-2
C
Sender - Fuel Level
D-1
13
Switches - Implement Hold Position
A-4
26
Normally open switch that is closed due to an applied condition, and will open again with a specific decrease in that condition. Resistor, Sender and Solenoid Specifications Component Description
¹ At room temperature unless otherwise noted.
Resistance (Ohms)¹
Component Part Number
AA 1
9X-1123 325-PK-14
Wire Color
Socket
2
200-BK-14
Circuit Number Identification
Normally closed switch that will open with an increase of a specific condition.
Wire Gauge
Electrical Schematic Symbols And Definitions
Normally closed switch that is open due to an applied condition, and will close again with a specific decrease in that condition.
FUSE - A component in an electrical circuit that will open the circuit if too much current flows through it.
The circle indicates that the component has screw terminals and a wire can be disconnected from 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.
No circle indicates that the wire cannot be disconnected from the component.
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.
34.3 ± 1.7
This indicates that the component has a wire connected to it that is connected to ground.
A = Components located on Dash.
E = Components located on Relay/Fuse Panel.
A
A
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
D-1
D = Components located in Headliner.
Wire, Cable, or Harness Assembly Identification
C
Ground - Left Frame
C = Components located on Left Console.
Pin or Socket Number
T
Temperature Symbol
Typical representation of a Sure-Seal connector. The plugand receptacle contain both pins and sockets.
Single Wire Connector
Ground - Front Frame
B = Components located on Right Console.
Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.
Receptacle
Plug
1 2
1 2
1
Electrical Schematic Symbols And Definitions
Normally Open²
Mode Number
Mode Of Operation
AA
This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.
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. 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.