P0335

DTC P0335

CIRCUIT DESCRIPTION
The crankshaft position (CKP) sensor signal indicates the crankshaft speed and position. The CKP sensor works in conjunction with a 58-rib reluctor ring attached to the crankshaft in which two ribs are missing, 60 minus 2 ring. The engine control module (ECM) synchronizes the CKP by the reference gap which is created by the two missing ribs. The CKP sensor circuits connect directly to the ECM. The circuits between the CKP sensor and the ECM consists of the following circuits:
- A CKP sensor high
- A CKP sensor low
- A shielded ground

If the ECM has detected no CKP sensor pulses, DTC P0335 sets.

CONDITIONS FOR RUNNING THE DTC
- The engine is cranking or running.
- DTCs P0341, P0342, P0343 are not set.

CONDITIONS FOR SETTING THE DTC
The ECM has detected no CKP sensor pulses.

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.

TEST DESCRIPTION

Steps 1-4:

Steps 5-9:

Steps 10-14:

Steps 15-16:

Step 17:

Steps 18-23:

The numbers below refer to the step numbers on the diagnostic table.
4. This step tests for a short to voltage in a CKP sensor circuit between the ECM connector and the CKP connector when the key is off.
5. This step tests for a short to voltage in a CKP sensor circuit and an ignition circuit between the ECM connector and the CKP connector.