P0335

DTC P0335

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provide an overview of each diagnostic category.

DTC Descriptor

DTC P0335
- Crankshaft Position (CKP) Sensor Circuit

Diagnostic Fault Information






Typical Scan Tool Data






Circuit/System Description

The hall effect crankshaft position (CKP) sensor signal indicates the crankshaft speed and position. There are 57 teeth on the front of the crankshaft sprocket, plus a sync gap. The CKP sensor will output an ON/OFF pulse as each window passes the sensing element. The CKP sensor is connected directly to the engine control module (ECM) by the following circuits:

* The 5-volt reference circuit
* The low reference circuit
* The signal circuit

Conditions for Running the DTC

P0335
* The engine is cranking or running.
* The camshaft position (CMP) sensor signal is present.
* DTC P0335 runs continuously when the above conditions are met.
* DTCs P0652 or P0653 are not set.

Conditions for Setting the DTC

P0335

The ECM determines no signal from the CKP sensor.

Action Taken When the DTC Sets

DTC P0335 is a Type A DTC.

Conditions for Clearing the MIL/DTC

DTC P0335 is a Type A DTC.

Circuit/System Verification

1. If DTCs P0652 or P0653 are set, diagnose those DTCs first.
2. The engine starts and runs.
3. Engine running, observe the DTC information with a scan tool. DTC P0335 should not set.
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

P0335
1. Disconnect the CKP sensor.
2. Test for less than 1 ohm between low reference circuit terminal 2 on the ECM side of the connector and ground.

^ If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 3 on the ECM side of the connector and ground.

^ If less than the specified range, test the 5-volt reference circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the ECM.
^ If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.

4. Ignition ON, test for 4.8-5.2 volts between the signal circuit terminal 1 on the ECM side of the connector and ground.

^ If less than the specified range, test the affected signal circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the ECM.
^ If greater than the specified range, test the affected signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.

5. Ignition OFF, connect a 3A fused jumper wire to the CKP signal circuit terminal 1 on the ECM side of the connector.
6. Ignition ON, momentarily touch the end of the fused jumper wire to ground. The crank signal present and the engine RPM parameters on the scan tool should change.

^ If the crank signal present and the engine RPM does not change, replace the ECM.

7. Ignition OFF, inspect the wiring harness for any damage, opens, or shorts.

^ If the circuits test normal replace the CKP sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

* Crankshaft Position Sensor Replacement
* Crankshaft Reluctor and Oil Pump Drive Gear Replacement