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• When Monitored: • Set Condition: Possible Causes INTERMITTENT DTC (T752) ENGINE STARTER MOTOR RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE (T752) ENGINE STARTER MOTOR RELAY CONTROL CIRCUIT SHORTED TO THE (T751) FUSED IGNITION (T752) ENGINE STARTER MOTOR RELAY CONTROL CIRCUIT OPEN OR HIGH RESISTANCE STARTER RELAY ENGINE CONTROL MODULE (ECM) 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). Crank the engine for five seconds. 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. (T752) ENGINE STARTER MOTOR RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Remove the Starter Relay. Disconnect the Engine Control Module connector. Remove the ASD Relay from the IPM. Connect a jumper wire between cavity 30 and cavity 87 of the ASD Turn the ignition on. Measure the voltage of the (T752) Engine Starter Motor Relay Control Is there any voltage present? Yes >> Repair the (T752) Engine Starter Motor Relay Control circuit for a short to voltage. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go to 3 9 - 1532 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |