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2. TEST DRIVE Turn the ignition on. With the scan tool, erase the ECM DTCs. Test drive the vehicle. With the scan tool, read the ECM DTCs. Does the scan tool display this DTC? Yes >> Go To 3 No >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 3. CHECKING (K24) CRANKSHAFT POSITION SENSOR SIGNAL CIRCUIT Turn the ignition off. Disconnect the Crankshaft Position Sensor harness connector. Turn the ignition on. Measure the voltage of the (K24) CKP Sensor Signal circuit at the CKP Select the appropriate voltage reading. Voltage is above 5.4 volts. Go To 4 Voltage is between 4.7 and 5.4 volts. Go To 5 Voltage is below 4.7 volts. Go To 12 4. (K24) CRANKSHAFT POSITION SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE Turn the ignition off. Disconnect the ECM harness connectors. Remove the ASD Relay. Connect a jumper wire between cavity 30 and cavity 87 of the ASD Turn the ignition on. Measure the voltage of the (K24) CKP Position Sensor Signal circuit at Is the voltage below 1.0 volt? 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 (K24) Crankshaft Position Sensor Signal circuit for a short to voltage. Perform the ECM Verification Test Ver. 1. (Refer to 9 - 9 - 1356 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |