Electrical Connectors and Functions
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Connector     | Component     |
---|---|
J1/P1     | Electronic Control Module     |
J2/P2     | Electronic Control Module     |
J3A     | Machine Interface Connector     |
J3B     | Machine Interface Connector     |
J3C     | Machine Interface Connector     |
J4/P4 - J19/P19     | Fuel Injector     |
J20/P20     | Engine Speed/Timing Sensor     |
J21/P21     | Coolant Temperature Sensor     |
J22/P22     | Filtered Engine Oil Pressure Sensor     |
J23/P23     | Turbocharger Compressor Outlet Pressure Sensor     |
J25/P25     | Right Turbocharger Compressor Inlet Pressure Sensor     |
J26/P26     | Permanent Timing Calibration Connector     |
J27/P27     | Atmospheric Pressure Sensor     |
J28/P28     | Left Turbocharger Compressor Inlet Pressure Sensor     |
J29/P29     | Crankcase Pressure Sensor     |
J30/P30     | Left Exhaust Temperature Sensor     |
J31/P31     | Right Exhaust Temperature Sensor     |
J32/P32     | Aftercooler Temperature Sensor     |
J35/P35     | Throttle Position Sensor     |
J42/P42     | Service Tool Connector     |
J47/P47     | Coolant Flow Switch     |
J48/P48     | Unfiltered Engine Oil Pressure Sensor     |
J84/P84     | Engine Fan Speed Sensor     |
J85/P85     | Pressure Sensor for the Engine Cooling Fan Pump     |
J86/P86     | Engine Cooling Fan Solenoid     |
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Illustration 1 | g00607248 |
Electronic Control Module |
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Illustration 2 | g00870177 |
40-pin connector |
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Illustration 3 | g00680846 |
2-pin connector |
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Illustration 4 | g00893487 |
40-pin engine connector |
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Illustration 5 | g00680848 |
3-pin connector |
Caterpillar Information System:
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1276 - FMI 06
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1276 - FMI 05
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621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1275 - FMI 06
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1275 - FMI 05
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1276 - FMI 03
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1275 - FMI 03
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621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1275 - FMI 13
621G, 623G, 627G, 631G, 637G, and 657G Wheel Tractor-Scrapers Power Train Electronic Control System MID 027 - CID 1276 - FMI 13
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