RENR5042-02 109 Troubleshooting Section Repair: Repair the wiring and/or the connectors. Replace parts, if necessary. Ensure that all of the seals are properly connected. Verify that the original problem is resolved. STOP. Test Step 3. Short the Harness and Monitor the Status of the “Coolant Level” A. Connect Cat ET to the service tool connector. Refer to Troubleshooting, “Electronic Service Tools”. B. Disconnect the J800/P800 connectors for the engine coolant level sensor. C. Install a jumper wire between P800-B (Digital Sensor Return) and P800-C (Coolant Level Sensor). D. Turn the keyswitch to the ON position. E.
Monitor the status of “Coolant Level” on Cat ET while the jumper wire is installed. F. Turn the keyswitch to the OFF position. g01119200 Illustration 36 G. Remove the jumper wire. J61 and P61 terminals that are associated with the engine coolant level sensor H. Connect the J800/P800 connectors. (8) +8 VDC (digital sensor supply) (15) Return (36) Engine coolant level Expected Result: C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector, the customer connector, and the sensor connector that is associated with the circuit for the engine coolant level sensor. The status of the “Coolant Level” is when the jumper wire is installed. Results:
OK The status of the “Coolant Level” is when the jumper wire is installed. The ECM, the signal wire, and the return wire are OK. 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. Not OK – The status of the “Coolant Level” is not when the jumper wire is installed. Proceed to Test Step 5. E. Check the allen head screw on the customer connector for the proper torque. Refer to Troubleshooting, “Electrical Connectors - Inspect” for the correct torque value. Test Step 4. Check the Supply Voltage at the Sensor Connector Expected Result:
All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion, and of pinch points. A. Disconnect the J800/P800 connectors. B. Turn the keyswitch to the ON position. C. Measure the voltage between terminals P800-A (+8 VDC digital sensor supply) and P800-B (Return) at the harness connector for the engine coolant level sensor. Results: OK – The connectors and wiring are OK. Proceed to Test Step 3. Not OK – There is a problem with the connectors and/or the wiring. D. Turn the keyswitch to the OFF position.