112 RENR5042-02 Troubleshooting Section 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. STOP. Test Step 3. Test the Diagnostic Lamp Circuit at the ECM Connector A. Disconnect the J1/P1 connectors. B. Connect a jumper wire between terminal P1-28 and engine ground. C. Turn the keyswitch to the ON position and observe the diagnostic lamp. D. Remove the jumper wire and observe the diagnostic lamp. Expected Result:
g01102219 Illustration 40 The diagnostic lamp turned on while the jumper wire was connected. The diagnostic lamp turned off when the jumper wire was removed. J61 and P61 terminals that are associated with the diagnostic lamp (24) Diagnostic lamp Results: C. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the diagnostic lamp. OK The diagnostic lamp turned on while the jumper wire was connected. The diagnostic lamp turned off when the jumper wire was removed. The circuit for the diagnostic lamp is functioning properly. Proceed to Test Step 6. 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 diagnostic lamp did not turn on. There is a problem with the circuit for the diagnostic lamp. Proceed to Test Step 4. 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. Test the Diagnostic Lamp Circuit at the Diagnostic Lamp F. Check the harness and wiring for abrasions and for pinch points from the diagnostic lamp to the ECM. A. Disconnect wire F404-RD from the diagnostic lamp. Expected Result: B.
Connect a jumper wire between the diagnostic lamp’s open terminal and engine ground. 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. C. Turn the keyswitch to the ON position and observe the diagnostic lamp. D. Remove the jumper wire and observe the diagnostic lamp. Results: OK The connectors and the wiring are OK. Proceed to Test Step 3.