P0335
CIRCUIT DESCRIPTIONThe hall effect Crankshaft Position (CKP) sensor signal indicates the crankshaft speed and position. There are 57 teeth on the front of the crankshaft sprocket, plus a sync gap. The CKP sensor will output an ON-OFF pulse as each window passes the sensing element. The CKP sensor is connected directly to the Electronic Control (ECM) Module by the following circuits:
^ The 12- volt reference circuit.
^ The low reference circuit.
^ The CKP sensor signal circuit.
CONDITIONS FOR RUNNING THE DTC
^ The engine is cranking or running.
^ The Camshaft Position (CMP) sensor signal is present.
CONDITIONS FOR SETTING THE DTC
The Engine Control Module (ECM) determines no signal from the CKP sensor for less than 8 seconds.
ACTION TAKEN WHEN THE DTC SETS
^ The control module illuminates the Malfunction Indicator Lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
^ The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
^ The control module turns OFF the Malfunction Indicator Lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
^ A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
^ A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
^ Use a scan tool in order to clear the MIL and the DTC.
DIAGNOSTIC AIDS
IMPORTANT:
^ Remove any debris from the ECM connector surfaces before servicing the ECM. Inspect the ECM connector gaskets when diagnosing or replacing the ECM. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the ECM.
^ For any test that requires probing the ECM or the component harness connectors, use the J 35616-A Connector Test Adapter Kit. Using this kit prevents any damage to the harness connector terminals. Refer to Testing for Intermittent and Poor Connections in Diagrams.
The following conditions may cause this DTC to set:
^ Any poor connections or poor terminal tension at the sensor. Refer to Testing for Intermittent and Poor Connections in Diagrams.
^ Any crankshaft reluctor wheel damage or improper installation
^ The sensor coming in contact with the reluctor wheel
^ The engine running out of fuel
Excess crankshaft end play causes the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This could result in any one of the following conditions:
^ A no start.
^ A start and stall.
^ Erratic performance.
For an intermittent, Refer to Intermittent Conditions. Intermittent Conditions
TEST
