RENR5042-02 179 Troubleshooting Section Repair: If voltage is not present on terminal B, repair the wire between the +Battery and the keyswitch. Check the battery’s no-load voltage. Return all wiring to the original configuration. Verify that the problem is resolved. Repair: Temporarily connect a test ECM. Refer to Troubleshooting, “Replacing the ECM”. Check the operation of the warning lamp when the test ECM is installed. STOP. If the problem is resolved with the test ECM, reconnect the original ECM. If the problem returns with the original ECM, replace the original ECM. Verify that the problem is resolved. Not OK – Voltage is not present on terminal R at the keyswitch. STOP. Repair:
If voltage is present on terminal B of the keyswitch but not present on terminal R, replace the keyswitch. Return all wiring to the original configuration. Verify that the problem is resolved. STOP. Test Step 6. Check the Operation of the ECM A. Remove terminal P1-29. B. Fabricate a jumper wire 100 mm (4 inch) long. Crimp a Deutsch pin to both ends of the wire. C. Insert the jumper into P1-29. D. Connect the J1/P1 connectors. E. Connect one probe of a voltage test lamp to the jumper wire in P1-29. F. Connect the other probe of the voltage test lamp to +Battery. G. Turn the keyswitch to the ON position. Wait for ten seconds. H. Turn the keyswitch to the OFF position. Expected Result:
The test lamp turned ON for five seconds. Then, the test lamp turned OFF. Results: OK – The test lamp turned ON for five seconds. Then, the test lamp turned OFF. The ECM is operating correctly. The problem appears to be resolved. Repair: The problem may be intermittent. If the problem is intermittent, refer to the diagnostic functional test Troubleshooting, “Electrical Connectors - Inspect”. STOP. Not OK The test lamp did not turn on for five seconds. There is a problem with the ECM.