P0336

P0336-CRANKSHAFT POSITION (CKP) SENSOR SIGNAL

P0336 - Crankshaft Position (CKP) Sensor Signal:

WHEN MONITORED
With the key on.

SET CONDITION
The voltage detected at the Crankshaft position sensor is below a calibrated value.

POSSIBLE CAUSES
- CKP sensor
- (K24) Signal circuit open
- (K853) 5-Volt supply circuit open
- (K975) Return circuit open
- (K24) Signal circuit shorted to (K975) return circuit
- (K853) 5-Volt supply circuit shorted to (K975) return circuit
- (K24) Signal circuit shorted to (K853) 5-volt supply circuit
- (K24) Signal circuit shorted to ground
- (K853) 5-Volt supply circuit shorted to battery negative
- Intermittent condition
- ECM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test

1. CKP SENSOR
Disconnect the CKP sensor harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance between the (K853) 5-volt supply circuit and the (K24) signal circuit of the sensor.

Q: Is the resistance between 900 and 1100 ohms?

YES: Go To 2
NO: Replace the CKP sensor. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1

2. (K24) SIGNAL CIRCUIT OPEN





Disconnect the ECM harness connectors.
Disconnect the CKP sensor harness connector.
Check connectors - Clean/repair as necessary.
Measure the resistance of the (K24) signal circuit between the ECM harness connector and the CKP sensor harness connector.

Q: Is the resistance less than 10 ohms?

YES: Go To 3
NO: Repair the open (K24) signal circuit. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1

3. (K853) 5-VOLT SUPPLY CIRCUIT OPEN





Measure the resistance of the (K853) 5-volt supply circuit between the ECM harness connector and the CKP sensor harness connector.

Q: Is the resistance less than 10 ohms?

YES: Go To 4
NO: Repair the open (K853) 5-volt supply circuit. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1

4. (K975) RETURN CIRCUIT OPEN





Measure the resistance of the (K975) return circuit between the ECM harness connector and the CKP sensor harness connector.

Q: Is the resistance less than 10 ohms?

YES: Go To 5
NO: Repair the open (K975) return circuit. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1

5. (K24) SIGNAL CIRCUIT SHORTED TO (K975) RETURN CIRCUIT





Measure the resistance between the (K24) signal circuit and the (K975) return circuit in the sensor connector.

Q: Is the resistance greater than 100k Ohms?

YES: Go To 6
NO: Repair the short circuit or replace the engine harness. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1

6. (K853) 5-VOLT SUPPLY CIRCUIT SHORTED TO (K975) RETURN CIRCUIT





Measure the resistance between the (K853) 5-volt supply circuit and the (K975) return circuit in the sensor connector.

Q: Is the resistance greater than 100k Ohms?

YES: Go To 7
NO: Repair the short circuit or replace the engine harness. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1

7. (K24) SIGNAL CIRCUIT SHORTED GROUND





Measure the resistance between the (K24) signal circuit and ground.

Q: Is the resistance greater than 100k Ohms?

YES: Go To 8
NO: Repair the short circuit or replace the engine harness. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1

8. (K853) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND





Measure the resistance between the (K853) 5-volt supply circuit and ground.

Q: Is the resistance greater than 100k Ohms?

YES: Go To 9
NO: Repair the short circuit or replace the engine harness. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1

9. (K24) SIGNAL CIRCUIT SHORTED TO (K853) 5-VOLT SUPPLY CIRCUIT





Measure the resistance between the (K24) signal circuit and the (K853) 5-volt supply circuit in the sensor connector.

Q: Is the resistance greater than 100k Ohms?

YES: Go To 10
NO: Repair the short circuit or replace the engine harness. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1

10. ECM





Reconnect the ECM harness connectors.
Ignition on, engine not running.
With the scan tool, erase DTCs.
Connect a jumper wire between the sensor supply circuit and the sensor return circuit in the sensor harness connector.

Q: Did DTC P0337 set?

YES: Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure).
NO: Replace the ECM. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1