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4. S/C SWITCH #1 SIGNAL CIRCUIT OPEN Turn the ignition off. Disconnect both S/C Switch harness connectors. Disconnect the ECM harness connectors. Measure the resistance between the S/C Switch #1 Signal circuit Is the resistance below 10.0 ohms for both measurements? Yes >> Go To 5 No >> Repair the S/C Switch #1 Signal circuit that measured above 10.0 ohms for an open. Perform the ECM Verification Test Ver. 1 (Refer to 9 - 5. S/C SWITCH #1 SIGNAL CIRCUIT SHORT TO GROUND Turn the ignition off. Disconnect both S/C Switch harness connectors. Disconnect the ECM harness connectors. Measure the resistance between ground and the S/C Switch #1 Signal Is the resistance above 1000 ohms? Yes >> Replace and program the Engine Control Module in accor- dance with the Service Information. Perform the ECM Verification Test Ver. 1 (Refer to 9 - No >> Repair the S/C Switch #1 Signal circuit for a short to ground. Perform the ECM Verification Test Ver. 1 (Refer to 9 - 9 - 1058 ENGINE DIESEL DIAG KJ |