P0335

DTC P0335

CIRCUIT DESCRIPTION
The crankshaft position (CKP) sensor signal indicates the crankshaft speed and position. The CKP sensor is used for ignition timing, fuel injector timing, misfire diagnostics, and tachometer display. The CKP sensor circuits are connected directly to the powertrain control module (PCM) and consists of the following circuits:
- The 12-volt reference
- The low reference
- The medium resolution engine speed signal

If the PCM detects no signal from the CKP sensor, DTC P0335 sets.

CONDITIONS FOR RUNNING THE DTC
- The camshaft position (CMP) sensor signal is incrementing.
- The mass air flow (MAF) is more than 5 g/s.
- The engine is cranking or running.

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

ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/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 - 7:

Steps 8 - 11:

Steps 12 - 15:

Steps 16 - 17:

Steps 18 - 21:

The numbers below refer to the step numbers on the diagnostic table.
4. An internally shorted camshaft position (CMP) sensor, crankshaft position (CKP) sensor or a short to ground on either 12-volt reference circuit will set DTCs P0335 and P0340.
8. This step tests for an internally shorted CMP sensor or CKP sensor.
9. This step tests for a short to ground on the 12-volt reference circuits of the CMP sensor or the CKP sensor.