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VIN L




DTC P0335

Diagnostic Instructions

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

DTC Descriptor
DTC P0335
- Crankshaft Position Sensor Circuit

Diagnostic Fault Information





Typical Scan Tool Data





Circuit/System Description

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

Conditions for Running the DTC

* The engine is cranking or running.
* The camshaft position sensor signal is present.
* DTC P0335 runs continuously when the above conditions are met.

Conditions for Setting the DTC

The ECM determines no signal from the crankshaft position 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.

Reference Information
Schematic Reference

Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference

Control Module References (Programming and Relearning)for scan tool information
Special Tools

J 38522 - Variable Signal Generator

Circuit/System Verification

1. The engine starts and runs.
2. Engine running, observe the DTC information with a scan tool. DTC P0335 should not set.
3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF and scan tool disconnected for 90 s, disconnect the harness connector at the crankshaft position sensor.
2. Ignition OFF and all vehicle systems OFF, it may take 2 minutes for all vehicle systems to power down, test for less than 5 ohm between low reference circuit terminal 2 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 V between the 5 V reference 1 circuit terminal 3 of the connector and ground.

• If less than the specified range, test the 5 V reference 1 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 V reference 1 circuit for a short to voltage. If the circuit tests normal, replace the ECM.

4. Test for 4.8-5.2 V between the signal circuit terminal 1 of the connector and ground.

• If less than the specified range, test the 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 signal circuit for an a short to voltage. If the circuit tests normal, replace the ECM.

5. Ignition OFF, connect a 3 A fused jumper wire between signal circuit terminal 1 of the connector and ground.
6. Ignition ON, observe the scan tool 5 V Reference 1 Circuit Status parameter. The parameter should display OK.

• If the 5 V Reference 1 Circuit Status parameter does not display OK, test the signal circuit for a short to 5 V reference 1. If the circuit tests normal, replace the ECM.

7. Ignition OFF, connect the red lead of the J 38522 to the signal circuit terminal 1 of the connector. Connect the battery voltage supply to B+. Connect the black lead to ground.
8. Set the J 38522 signal switch to 5 V, the frequency to 5K, and the duty cycle to normal.
9. Ignition ON, observe the Crankshaft Position Sensor Signal Present parameter of the scan tool. The parameter should display YES.

• If the parameter does not display YES, replace the ECM.

10. If the circuits test normal replace the crankshaft position sensor.

Repair Instructions

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

* Crankshaft Position Sensor Replacement (Crankshaft Position Sensor Replacement)
* Control Module References (Programming and Relearning)for ECM replacement, setup, and programming

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