P0339-CRANKSHAFT POSITION SENSOR CIRCUIT INTERMITTENT 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 ENGINE

NOTE: 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.

Did the engine start?

Yes

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Go To 2

2.(K853, K3) CKP SENSOR SIGNAL CIRCUITS SHORTED TO GROUND

Is the resistance above 1000 ohms for both measurements?

Yes

Go To 3

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

Is the resistance above 1000 ohms?

Yes

Go To 4

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

Is the resistance below 10.0 ohms for both measurements?

Yes

Go To5

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

Is the voltage below 1.0 volt for both measurements?

Yes

Go To 6

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

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).

Replace the Crankshaft Position Sensor.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).