Sensors and Electrical Connectors
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| Connector | Function | |
| J1/P1 | ECM Connector (Machine) | |
| J2/P2 | ECM Connector (Engine) | |
| J62 | Service Tool Connector | |
| J100/P100 | Engine Coolant Temperature Sensor | |
| J103/P103 | Intake Manifold Air Temperature Sensor | |
| J105/P105 | Fuel Temperature Sensor | |
| J137/P137 | Hydraulic Oil Temperature Sensor | |
| J200/P200 | Turbocharger Outlet Pressure Sensor | |
| J201/P201 | Engine Oil Pressure Sensor | |
| J203/P203 | Atmospheric Pressure Sensor | |
| J205/P205 | Turbocharger Inlet Pressure Sensor | |
| J209/P209 | Fuel Pressure Sensor | |
| J300/P300 | Injector Solenoid Harness | |
| J301/P301 to J306/P306 |
Injector Solenoids | |
| J400/P400 | Timing Calibration (TC) Probe Connector | |
| J401/P401 | Primary Engine Speed/Timing Sensor | |
| J402/P402 | Secondary Engine Speed/Timing Sensor | |
| J403/P403 | Throttle Position Sensor | |
| J508/P508 | Hydraulic Demand Fan Solenoid | |
| J700/P700 | Ground Level Shutdown Switch | |
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| Illustration 1 | g00693506 |
ECM and harness connectors | |
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| Illustration 2 | g01006779 |
Block diagram | |
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| Illustration 3 | g01006781 |
Component locations ( 3176C and 3196) | |
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| Illustration 4 | g01006782 |
Component locations ( 3406E) | |
Caterpillar Information System:
2001/10/15 Correction to Specification , "Track Rollers" {4180}
631G Wheel Tractor Power Train Transmission, Torque Converter, Transfer Gears and Differential - Install
D3G, D4G and D5G Hystat Track-Type Tractors Power Train Final Drive and Sprocket - Install
D5N Track-Type Tractor Transmission Oil Filter
627G Wheel Scraper Power Train Differential and Bevel Gear - Disassemble
2001/10/15 Correction to Disassembly and Assembly , "Track Roller - Install" {4180}
2001/10/15 Update to the Testing and Adjusting Module , "Line Relief Valve Test and Adjust" {5051}
D10R Track-Type Tractor Engine Supplement Hydraulic Fan Clutch - Install
D10R Track-Type Tractor Engine Supplement Hydraulic Fan Clutch - Remove
623G Wheel Tractor-Scraper Machine Systems Check Valve (Carry) - Install
2001/10/15 Correction to Disassembly and Assembly , "Track Roller - Install" {4180, 4180}
2001/10/15 Correction to Specification , "Track Rollers" {4180}
631G Wheel Tractor Power Train Transmission and Transfer Gears - Separate
D3G, D4G and D5G Track-Type Tractors Parking Brake
D6N Track-Type Tractor Power Train Priority Valve
631G Wheel Tractor Power Train Transmission and Transfer Gears - Connect
D3G, D4G and D5G Hystat Track-Type Tractors Power Train Final Drive and Sprocket - Disassemble
3176C, 3196 and 3406E Engines for Caterpillar Built Machines Digital Sensor Supply Circuit - Test
3176C, 3196 and 3406E Engines for Caterpillar Built Machines Engine Temperature Sensor Open or Short Circuit - Test
D10R Track-Type Tractor Power Train Chrome Bearing - Remove and Install
2001/10/29 Correction to Disassembly and Assembly , "Bucket-Install" {0645, 6101, 6102}
623G Wheel Tractor-Scraper Machine Systems Check Valve (Carry) - Disassemble
966H and 972H Wheel Loaders Machine Systems Electrohydraulic Control - Remove
621G and 623G Wheel Tractor Power Train Final Drive - Disassemble