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P0339






P0339-CRANKSHAFT POSITION SENSOR INTERMITTENT







- When Monitored:
With the engine cranking or running and battery voltage greater than 10.4 volts.

- Set Condition:
The PCM detects that the Crankshaft Position Sensor input voltage is implausible.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Pre-Diagnostic Troubleshooting Procedure

1. DTC IS ACTIVE
1. Start the engine and allow it to reach normal operating temperature. If the engine will not start, crank the engine for at least 10 seconds.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.

NOTE: It may be necessary to test drive the vehicle within the DTC monitoring conditions in order for this DTC to set.

2. With a scan tool, select View DTCs.

Is the DTC Active at this time?

Yes

- Go to 2

No

- Go to 15

2. (F855) 5 VOLT SUPPLY CIRCUIT VOLTAGE




1. Turn the ignition off.
2. Disconnect the Crankshaft Position Sensor connector.
3. Turn the ignition on.
4. Measure the voltage of the (F855) 5 Volt Supply circuit in the Crankshaft Position Sensor harness connector.

Is the voltage between 4.7 and 5.1 volts?

Yes

- Go to 3

No

- Go to 6

3. (K24) CKP SIGNAL CIRCUIT VOLTAGE




1. Measure the voltage of the (K24) CKP Signal circuit in the Crankshaft Position Sensor harness connector.

Is the voltage between 4.7 and 5.1 volts?

Yes

- Go to 4

No

- Go to 10

4. (K900) SENSOR GROUND CIRCUIT TEST




1. Turn the ignition off.
2. Using a 12 volt test light connected to 12 volts, check the (K900) Sensor Ground in the Crankshaft Position Sensor harness connector.

NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes

- Go to 5

No

- Go to 14

5. (F855) 5 VOLT SUPPLY CIRCUIT SHORTED TO THE (K24) CKP SIGNAL CIRCUIT




1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) connector.
3. Measure the resistance between the (F855) 5 Volt Supply circuit and the (K24) CKP Signal circuit in the Crankshaft Position Sensor harness connector.

Is the resistance above 100 ohms?

Yes

- Go to 17

No

- Repair the short between the (F855) 5 Volt Supply circuit and the (K24) CKP Signal circuit.
- Perform the PCM Verification Test. PCM Verification Test

6. (F855) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the C2 Powertrain Control Module (PCM) connector.
3. Turn the ignition on.
4. Measure the voltage of the (F855) 5 Volt Supply circuit in the Crankshaft Position Sensor harness connector.

Is there any voltage present?

Yes

- Repair the short to voltage in the (F855) 5 Volt Supply circuit.
- Perform the PCM Verification Test. PCM Verification Test

No

- Go to 7

7. (F855) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Measure the resistance between ground and the (F855) 5 Volt Supply circuit in the Crankshaft Position Sensor harness connector.

Is the resistance above 100 ohms?

Yes

- Go to 8

No

- Repair the short to ground in the (F855) 5 Volt Supply circuit.
- Perform the PCM Verification Test. PCM Verification Test

8. (F855) 5 VOLT SUPPLY CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT




1. Measure the resistance between the (F855) 5 Volt Supply circuit and the (K900) Sensor Ground circuit in the Crankshaft Position Sensor harness connector.

Is the resistance above 100 ohms?

Yes

- Go to 9

No

- Repair the short between the (F855) 5 Volt Supply circuit and the (K900) Sensor Ground circuit.
- Perform the PCM Verification Test. PCM Verification Test

9. (F855) 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE





CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals, resulting in poor terminal to pin connection. Install PCM Pinout Box 8815 to perform diagnosis.

1. Measure the resistance of the (F855) 5 Volt Supply circuit between the Crankshaft Position Sensor harness connector and the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?

Yes

- Go to 19

No

- Repair the open or high resistance in the (F855) 5 Volt Supply circuit.
- Perform the PCM Verification Test. PCM Verification Test

10. (K24) CKP SIGNAL CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) connector.
3. Turn the ignition on.
4. Measure the voltage of the (K24) CKP Signal circuit in the Crankshaft Position Sensor harness connector.

Is there any voltage present?

Yes

- Repair the short to voltage in the (K24) CKP Signal circuit.
- Perform the PCM Verification Test. PCM Verification Test

No

- Go to 11

11. (K24) CKP SIGNAL CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Measure the resistance between ground and the (K24) CKP Signal circuit in the Crankshaft Position Sensor harness connector.

Is the resistance above 100 ohms?

Yes

- Go to 12

No

- Repair the short to ground in the (K24) CKP Signal circuit.
- Perform the PCM Verification Test. PCM Verification Test

12. (K24) CKP SIGNAL CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT




1. Measure the resistance between the (K24) CKP Signal circuit and the (K900) Sensor Ground circuit in the Crankshaft Position Sensor harness connector.

Is the resistance above 100 ohms?

Yes

- Go to 13

No

- Repair the short between the (K24) CKP Signal circuit and the (K900) Sensor Ground circuit.
- Perform the PCM Verification Test. PCM Verification Test

13. (K24) CKP SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE





CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals, resulting in poor terminal to pin connection. Install PCM Pinout Box 8815 to perform diagnosis.

1. Measure the resistance of the (K24) CKP Signal circuit between the Crankshaft Position Sensor harness connector and the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?

Yes

- Go to 19

No

- Repair the open or high resistance in the (K24) CKP Signal circuit.
- Perform the PCM Verification Test. PCM Verification Test

14. (K900) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE




1. Turn the ignition off.
2. Disconnect the C2 Powertrain Control Module (PCM) connector.

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals, resulting in poor terminal to pin connection. Install PCM Pinout Box 8815 to perform diagnosis.

3. Measure the resistance of the (K900) Sensor Ground circuit between the Crankshaft Position Sensor harness connector and the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?

Yes

- Go to 19

No

- Repair the open or high resistance in the (K900) Sensor Ground circuit.
- Perform the PCM Verification Test. PCM Verification Test

15. ERRATIC CRANKSHAFT POSITION SENSOR SIGNAL




1. Turn the ignition off.
2. With a lab scope probe and the Miller special tool #6801, backprobe the (K24) CKP Signal circuit in the Crankshaft Position Sensor harness connector.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.

3. Turn the ignition on.
4. Wiggle the related wire harness and lightly tap on the Crankshaft Position Sensor.
5. Observe the lab scope screen.
6. Look for any pulses generated by the Crankshaft Position Sensor.
7. Allow the engine to idle.
8. Observe the lab scope screen.

Did the Crankshaft Position Sensor generate any erratic pulses?

Yes

- Go to 17

No

- Go to 16

16. ERRATIC CAMSHAFT POSITION SENSOR SIGNAL




1. Turn the ignition off.
2. With a lab scope probe and the Miller special tool #6801, backprobe the (K44) CMP Signal circuit in the Camshaft Position Sensor harness connector.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.

3. Turn the ignition on.
4. Wiggle the related wire harness and lightly tap on the Camshaft Position Sensor.
5. Observe the lab scope screen.
6. Look for any pulses generated by the Camshaft Position Sensor.
7. Allow the engine to idle.
8. Observe the lab scope screen.

Did the Camshaft Position Sensor generate any pulses?

Yes

- Go to 18

No

- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. Checking for an Intermittent DTC

17. CRANKSHAFT POSITION SENSOR
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Crankshaft Position Sensor and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Verify that there is good pin to terminal contact in the CKP Sensor and the Powertrain Control Module connectors.
5. Inspect the Crankshaft Position Sensor for any condition that would result in an incorrect signal, such as damage or contamination.
6. Make sure the Crankshaft Position Sensor is properly installed and the mounting bolt(s) are tightened to the proper specification.

Were any problems found?

Yes

- Repair as necessary.
- Perform the PCM Verification Test. PCM Verification Test

No

- Replace the Crankshaft Position Sensor.
- Perform the PCM Verification Test. PCM Verification Test

18. CAMSHAFT POSITION SENSOR
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Camshaft Position Sensor and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Verify that there is good pin to terminal contact in the CMP Sensor and the Powertrain Control Module connectors.
5. Inspect the Camshaft Position Sensor for any condition that would result in an incorrect signal, such as damage or contamination.
6. Make sure the Camshaft Position Sensor is properly installed and the mounting bolt(s) are tightened to the proper specification.

Were any problems found?

Yes

- Repair as necessary.
- Perform the PCM Verification Test. PCM Verification Test

No

- Replace the Camshaft Position Sensor.
- Perform the PCM Verification Test. PCM Verification Test

19. POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Crankshaft Position Sensor and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
5. Look for the data to change or for the DTC to reset during the wiggle test.
6. Search for any Technical Service Bulletins that may apply.

Were any problems found?

Yes

- Repair as necessary.
- Perform the PCM Verification Test. PCM Verification Test

No

- Replace and program the Powertrain Control Module (PCM).
- Perform the PCM Verification Test. PCM Verification Test

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