P0335

CIRCUIT DESCRIPTION
The crankshaft position (CKP) sensor signal indicates the crankshaft speed and position. The CKP sensor is connected directly to the powertrain control module (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 in transition.
^ The mass airflow (MAF) is more than 3 grams per second.
^ The ignition switch is in the crank mode.

CONDITIONS FOR SETTING THE DTC
The PCM does not receive signals from the CKP sensor for at least 4 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.
^ Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS
The following conditions may cause this DTC to set:
^ Poor connections, or terminal tension at the sensor-Refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.
^ Crankshaft reluctor wheel damage
^ Improper installation of the crankshaft reluctor wheel
^ The sensor coming in contact with the reluctor wheel
^ The engine runs out of fuel

Excess crankshaft end play causes the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This may result in one of the following conditions:
^ A no start
^ A start and a stall
^ Unstable performance

For an intermittent, refer to Intermittent Conditions. Intermittent Conditions

TEST DESCRIPTION

Steps 1-8:

Steps 9-17:

The numbers below refer to the step numbers on the diagnostic table.
6. This step simulates a CKP sensor signal to the PCM. If the PCM receives the signal, the fuel pump will operate for 2 seconds. If the fuel pump operates, the condition involves terminal contact at one of the following components:
^ The CKP sensor
^ The CKP sensor reluctor wheel
7. This test determines if the CKP sensor signal circuit is faulty or if the PCM is faulty.