DOOR GP-CAB 4563321 - Caterpillar

Illustration 1 g01146754
Schematic for the digital sensor supplyTest Step 1. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the OFF position.
Illustration 2 g01121173
Left side view (1) P61 customer connector (2) J1/P1 ECM connectors
Thoroughly inspect connectors (1) and (2). Inspect the connectors for each digital sensor. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 3 g01215738
P1 ECM connector (P1-4) +8 VDC (digital sensor supply) (P1-5) Return
Illustration 4 g01119753
J61 and P61 customer connectors (8) +8 VDC (digital sensor supply) (9) Return
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the digital sensor supply.
Check the allen head screw on each ECM connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and wiring for abrasions and for pinch points from the battery to the ECM.Expected Result:All of the connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion or of pinch points.Results:
OK - The connectors and the wiring are OK. Proceed to Test Step 2.
Not OK - There is a problem with a connector and/or the wiring.Repair: Repair the connector and/or the wiring. Replace parts, if necessary. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled. Verify that the problem is resolved.STOPTest Step 2. Check for Active Diagnostic Codes
Connect the Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools".
Turn the keyswitch to the ON position.
Observe the active diagnostic code screen on Cat ET. Wait at least 15 seconds so that any codes may become active. Look for these codes:
041-03 8 Volt DC Supply short to +batt
041-04 8 Volt DC Supply short to groundExpected Result:One of the above diagnostic codes is active.Results:
Active 041-03 code - A 041-03 diagnostic code is active. Proceed to Test Step 3.
Active 041-04 code - A 041-04 diagnostic code is active. Proceed to Test Step 4.
No active codes - None of the above codes are active.Repair: If any of the above codes are logged and the engine is not running properly, refer to Troubleshooting, "Troubleshooting Without a Diagnostic Code".If the engine is running properly at this time, there may be an intermittent problem in a harness that is causing the codes to be logged. Refer to Troubleshooting, "Electrical Connectors - Inspect".STOPTest Step 3. Check the Voltage on the +8 V Supply Wire
Turn the keyswitch to the OFF position.
Disconnect the harness connectors for the engine coolant level sensor J800/P800.
Turn the keyswitch to the ON position.
Measure the voltage between terminals A and B at the harness connector for the sensor.Expected Result:The voltage measurement is 8.0 0.4 VDC.Results:
OK - The voltage measurement is 8.0 0.4 VDC.Repair: Connect the sensor connectors. Clear all diagnostic codes. Check for active diagnostic codes. If the problem is intermittent, refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - The voltage measurement is not 8.0 0.4 VDC. There is a problem with the