P0672-CYLINDER 2 GLOW PLUG CIRCUIT

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the ignition on and the Glow Plug Module Glow Plug command on.
Set Condition:
The ECM detects an open or short on the Cylinder 2 Glow Plug circuit for 0.5 seconds.

Possible Causes

INTERMITTENT DTC

(A203) GLOW PLUG 2 CONTROL CIRCUIT OPEN

(A203) GLOW PLUG 2 CONTROL CIRCUIT SHORTED TO GROUND

(A203) GLOW PLUG 2 CONTROL CIRCUIT SHORTED TO VOLTAGE

GLOW PLUG 2

GLOW PLUG MODULE

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

1.CHECK FOR ACTIVE DTC

Did this DTC set again?

Yes

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

2.(A203) GLOW PLUG 2 CONTROL CIRCUIT OPEN

Is the resistance below 10.0 ohms?

Yes

Repair the (A203) Glow Plug 2 Control circuit for an open.
Perform ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

3.(A203) GLOW PLUG 2 CONTROL CIRCUIT SHORTED TO GROUND

Is the resistance below 1000 ohms?

Yes

Repair the (A203) Glow Plug 2 Control circuit for a short to ground.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

4.(A203) GLOW PLUG 2 CONTROL CIRCUIT SHORTED TO VOLTAGE

Is there voltage present on the (A203) Glow Plug 2 Control circuit?

Yes

Repair the (A203) Glow Plug 2 Control circuit for a short to voltage
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

5.GLOW PLUG 2

Does the scan tool display this DTC?

Yes

Test complete.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

6.GLOW PLUG MODULE

Were any problems found?

Yes

Repair as necessary.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Replace the Glow Plug Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)