116 RENR5042-02 Troubleshooting Section 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. STOP. Test Step 2. Check for Active Diagnostic Codes A. Connect the Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, “Electronic Service Tools”. B. Turn the keyswitch to the ON position. C. 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 ground Expected Result: g01119753 Illustration 44 One of the above diagnostic codes is active. J61 and P61 customer connectors Results: (8) +8 VDC (digital sensor supply) (9) Return Active 041-03 code A 041-03 diagnostic code is active. Proceed to Test Step 3. C. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the digital sensor supply. Active 041-04 code A 041-04 diagnostic code is active. Proceed to Test Step 4. D. Check the allen head screw on each ECM connector for the proper torque. Refer to Troubleshooting, “Electrical Connectors - Inspect” for the correct torque values.
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”. E. Check the harness and wiring for abrasions and for pinch points from the battery to the ECM. Expected Result: 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”. 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. STOP. Results:
Test Step 3. Check the Voltage on the +8 V Supply Wire OK The connectors and the wiring are OK. Proceed to Test Step 2. A. Turn the keyswitch to the OFF position. Not OK There is a problem with a connector and/or the wiring. B. Disconnect the harness connectors for the engine coolant level sensor J800/P800. C. Turn the keyswitch to the ON position.