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 transitioning.
^ The mass air flow (MAF) is more than 3 g/s.
^ The ignition switch is in the Crank mode.

CONDITIONS FOR SETTING THE DTC
The PCM determines there is 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.
^ Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS

Important:
^ Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM connector gaskets when diagnosing or replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the PCM.
^ For any test that requires probing the PCM 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 Circuit Testing in Diagnostic Aids.

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 Wiring Repairs in Diagnostic Aids.
^ Any crankshaft reluctor wheel damage or improper installation
^ The CKP 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.

TEST DESCRIPTION

Steps 1-8:

Steps 9-15:

Steps 16-18:

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. If the fuel pump operates, the condition is either terminal contact at the CKP sensor, the CKP sensor or, the CKP sensor reluctor wheel.
7. This test determines if the CKP sensor signal circuit or if the PCM is faulty.
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. To inspect the reluctor wheel, remove the starter and rotate the crankshaft while viewing the reluctor wheel through the CKP sensor hole. If you cannot determine if the reluctor wheel is damaged, the oil pan may have to be removed.
15. The CKP system variation learn procedure must be performed anytime the relationship between the CKP sensor and the CKP reluctor wheel is changed.
16. Before replacing the PCM, inspect the PCM harness connections.