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• When Monitored: • Set Condition: Possible Causes GLOW PLUG GLOW PLUG CONTROL CIRCUIT OPEN GLOW PLUG CONTROL CIRCUIT SHORTED TO GROUND GLOW PLUG CONTROL CIRCUIT SHORTED TO VOLTAGE GLOW PLUG MODULE INTERMITTENT CONDITION Diagnostic Test 1. CHECK FOR ACTIVE DTC NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may With the scan tool, erase ECM DTCs. Perform several ignition cycles leaving the ignition on for at least 10 seconds then off for 10 seconds. With the scan tool, read the ECM DTCs. Did this DTC set again? Yes >> Go To 2 No >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 2. GLOW PLUG CONTROL CIRCUIT OPEN Turn the ignition off. Disconnect each Glow Plug harness connector. Disconnect the Glow Plug Module harness connector. Measure the resistance of each Glow Plug Control circuit. Is the resistance below 10.0 ohms for each circuit? Yes >> Go To 3 No >> Repair the appropriate Glow Plug Control circuit for an open. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). 9 - 1154 ENGINE DIESEL DIAG KJ |