P0335

DTC P0335 Crankshaft Position (CKP) Sensor Circuit:

Crankshaft:

CIRCUIT DESCRIPTION

The Crankshaft Position (CKP) sensor is used to indicate crankshaft position so that the Engine Control Module (ECM) can determine which cylinder is misfiring when a misfire is present.


CONDITIONS FOR SETTING THE DTC


- No signal from the CKP sensor with the ECM receiving 20 pulses from the Camshaft Position (CMP) sensor.


ACTION TAKEN WHEN THE DTC SETS


- The Malfunction Indicator Lamp (MIL) will illuminate.

- The ECM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame buffer.


CONDITIONS FOR CLEARING THE MIL/DTC

- The Malfunction Indicator Lamp (MIL) will turn "OFF" after three consecutive drive cycles without a fault present.

- A DTC will clear after 40 consecutive warm-up cycles without a fault.

- DTC(s) can be cleared by using a scan tool or by disconnecting the ECM battery feed.


DIAGNOSTIC AIDS


Check the following conditions:

- If no problem is found with the CKP sensor or the circuitry, check the crankshaft timing belt pulley for foreign material or damaged teeth.

- Poor connection at ECM. Inspect harness connectors for backed out terminal, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.

- Damaged harness. Inspect the wiring harness for damage.

If DTC P0335 cannot be duplicated, the information included in the Freeze Frame data can be useful in determining vehicle operating conditions since the DTC was last set. This may assist in determining how often the DTC sets.


If any wiring repairs need to be made, Refer to Repair Procedures in Diagrams.

TEST DESCRIPTION


Number(s) below refer to the step number(s) on the Diagnostic Table.


1. The Engine OBD System Check prompts the technician to complete some basic checks and store the freeze frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.

2. Determine if fault is present. Review Freeze Frame data to determine when the DTC set. Always record this information.

3. If the CKP sensor is within the specified value, measure the resistance from each terminal (CKP sensor side) to ground. The CKP sensors resistance should be 1M ohms or more, if not replace the CKP sensor.

4. Checks for an open or short in the CKP sensors high and low reference circuits between the ECM and the CKP sensor.