P0335

CIRCUIT DESCRIPTION
The Crankshaft Position (CKP) sensor signal indicates the crankshaft speed and position. The CKP sensor is connected directly to the Powertrain Module Control (PCM), and consists of the following circuits:
^ The 12-volt reference circuit
^ The low reference circuit
^ The CKP sensor signal circuit

CONDITIONS FOR RUNNING THE DTC
^ DTCs P0101, P0102, P0103, P0341, P0342, or P0343 are not set.
^ The Camshaft Position (CMP) sensor is transitioning.
^ The Mass Airflow (MAF) is more than 3 g/s in the crank mode.
^ The MAF is more than 5 g/s in the running mode.

CONDITIONS FOR SETTING THE DTC
The PCM does not determines a signal from the CKP sensor for more than 3 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
The following conditions may cause this DTC to set:
^ Poor connections, or poor terminal tension at the sensor-Refer to Testing for Intermittent and Poor Connections in Diagrams.
^ Crankshaft reluctor wheel damage or improper installation
^ Excess air gap between the CKP sensor and the reluctor wheel
^ The engine running out of fuel
^ Foreign material passing between the sensor and the reluctor wheel

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:
^ Engine does not start
^ A start and stall
^ Erratic performance

For an intermittent, refer to Intermittent Conditions. Intermittent Conditions

TEST DESCRIPTION

Steps 1-8:

Steps 9-16:

The numbers below refer to the step numbers on the diagnostic table.
3. This step determines if the fault is present.
6. This step simulates a CKP sensor signal to the PCM. If the PCM receives the signal, the fuel pump will operate for about two seconds.
11. The CKP system variation learn procedure must be performed anytime the relationship between the CKP sensor and the CKP reluctor wheel is changed.
12. The CKP system variation learn procedure must be performed anytime the relationship between the CKP sensor and the CKP reluctor wheel is changed.