P0335-CRANKSHAFT POSITION SENSOR CIRCUIT INCORRECT OR MISSING SIGNAL
For a complete wiring diagram Refer to Section 8W
- When Monitored:
With the engine speed between 20 and 6000 rpm.
- Set Condition:
The ECM does not receive a Crankshaft Position Sensor signal or receives an incorrect signal.
| Possible Causes |
| CRANKSHAFT POSITION SENSOR |
| INTERMITTENT CONDITION |
| (K853, K3) CRANKSHAFT POSITION SENSOR SIGNAL CIRCUIT(S) SHORTED TO GROUND |
| (K853, K3) CKP SENSOR CIRCUITS SHORTED TOGETHER |
| (K853, K3) CKP SENSOR SIGNAL CIRCUITS OPEN |
| (K853, K3) CKP SENSOR SIGNAL CIRCUIT(S) SHORTED TO VOLTAGE |
| ENGINE CONTROL MODULE |
Diagnostic Test
1. ATTEMPT TO START THE ENGINENOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.
Attempt to start the engine.
Did the engine start?
Yes
- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
- Go To 2
2. (K853, K3) CKP SENSOR SIGNAL CIRCUITS SHORTED TO GROUND
Turn the ignition off.
Disconnect the CKP Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between ground and both of the CKP Sensor Signal circuits.
Is the resistance above 1000 ohms for both measurements?
Yes
- Go To 3
No
- Repair the CKP Sensor Signal circuit(s) for a short to ground.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
3. (K853, K3) CKP SENSOR CIRCUITS SHORTED TOGETHER
Measure the resistance between the CKP Sensor Signal circuits.
Is the resistance above 1000 ohms?
Yes
- Go To 4
No
- Repair the CKP Sensor Signal circuits for a short together.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
4. (K853, K3) CKP SENSOR SIGNAL CIRCUIT(S) OPEN
Measure the resistance of CKP Sensor Signal circuits between CKP Sensor harness connector and ECM harness connector.
Is the resistance below 10.0 ohms for both measurements?
Yes
- Go To5
No
- Repair the CKP Sensor Signal circuit(s) for an open.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
5. (K853, K3) CKP SENSOR SIGNAL CIRCUIT(S) SHORTED TO VOLTAGE
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Measure the voltage of both CKP Sensor Signal circuits.
Is the voltage below 1.0 volt for both measurements?
Yes
- Go To 6
No
- Repair the CKP Sensor Signal circuit(s) for a short to voltage.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
6. CRANKSHAFT POSITION SENSOR
Turn the ignition off.
Remove jumper wire and install ASD relay.
Connect CKP Sensor harness connector and ECM harness connector.
Use a lab scope, backprobe both of the CKP Sensor Signal circuits at the ECM harness connector.
Start the engine, if the engine will not start, crank the engine for several seconds while monitoring the scan tool.
Does the lab scope display a steady clean CKP Signal pattern for each circuit?
Yes
- Replace and program the Engine Control Module in accordance with the Service Information.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
- Replace the Crankshaft Position Sensor.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).