RENR5042-02 125 Troubleshooting Section b. Torque the allen head screw for the 70 pin ECM connector to 6.0 + 1.5 - 0.5 N·m (55 + 13 - 4 lb in). Repair: Repair the connector or replace the connector, as required. Verify that the repair eliminates the problem. STOP. Test Step 8. Perform the “Wiggle Test” on the Caterpillar Electronic Technician (ET) A. Select the “Wiggle Test” from the diagnostic tests on Cat ET. B. Choose the appropriate group of parameters to monitor. C. Press the “Start” button. Wiggle the wiring harness in order to reproduce intermittent problems. g01132863 Illustration 54 If an intermittent problem exists, the status will be highlighted and an audible beep will be heard.
Allen head screw for the 40 pin ECM connector (typical example) c. Torque the allen head screw for the 40 pin ECM connector to 2.25 ± 0.25 N·m (20 ± 2 lb in). Expected Result: No intermittent problems were indicated during the “Wiggle Test”. Results: OK No intermittent problems were found. The harness and connectors appear to be OK. If you were sent from another procedure, return to the procedure and continue testing. If this test has resolved the problem, return the engine to service. STOP. Not OK At least one intermittent problem was indicated. g01133047 Illustration 55 Repair: Repair the harness or the connector. Verify that the repair eliminates the problem.
Allen head screw for the 40 pin customer connector and the 70 pin customer connector (typical example) B. Connect the customer connector. STOP. Torque the allen head screw for the 40 pin customer connector and the 70 pin customer connector to 2.25 ± 0.25 N·m (20 ± 2 lb in). i02289857 Electrical Power Supply Circuit - Test Expected Result: The ECM connector is secure and the allen head screws are properly torqued. SMCS Code: 1401-038 System Operation Description: Results: Use this procedure to troubleshoot any suspect problems with the electrical power supply. OK The ECM connectors and the customer connector is properly connected. Proceed to Test Step 8.
This procedure covers the following diagnostic codes: Not OK The allen head screws for the ECM connector or the customer connector is damaged. 168-00 System Voltage High 168-01 System Voltage Low 168-02 System Voltage intermittent/erratic