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• When Monitored: • Set Condition: Possible Causes INTERMITTENT DTC (D330) GLOW PLUG MODULE SIGNAL CIRCUIT SHORTED TO GROUND (D330) GLOW PLUG MODULE SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE (K202) GLOW PLUG RELAY CONTROL CIRCUIT OPEN OR HIGH RESISTANCE (D330) GLOW PLUG MODULE SIGNAL CIRCUIT SHORTED TO VOLTAGE GLOW PLUG MODULE Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, Clear DTCs in the Engine Control Module (ECM). With the scan tool, actuate the Glow Plugs. Monitor the scan tool for at least two minutes. Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time. Start the engine. Allow the engine to reach normal operating temperature. Test drive the vehicle. With the scan tool, select View DTCs. Is the status Active for this DTC? Yes >> Go To 2 No >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 2. (D330) GLOW PLUG MODULE SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the Glow Plug Module harness connector. Disconnect the Engine Control Module (ECM) harness connector. Measure the resistance between ground and the (D330) Glow Plug Is the resistance below 1000 ohms? Yes >> Repair the (D330) Glow Plug Module Signal circuit for a short to ground. Perform the ECM Verification Test Ver. 1. (Refer to 9 - No >> Go to 3 PM ENGINE ELECTRICAL DIAGNOSTICS - DIESEL 9 - 1315 |