Cylinder 2 Glow Plug Open Circuit

2134-CYLINDER 2 GLOW PLUG OPEN CIRCUIT





For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
With the ignition on and the Glow Plug Module Glow Plug command on.

- Set Condition:
The Cylinder 2 Glow Plug circuit is open or shorted for 0.5 seconds.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Initial Inspection and Diagnostic Overview

Diagnostic Test

1. CHECK FOR ACTIVE DTC
Ignition on, engine not running.
With the scan tool, Clear DTCs in the Engine Control Module (ECM).
Perform several ignition cycles leaving the ignition on for at least 10 seconds then off for 10 seconds.
With the scan tool, read the ECM DTCs.
Did this DTC set again?

Yes

- Go To2

No

- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.Component Tests and General Diagnostics

2. GLOW PLUG CONTROL CIRCUIT OPEN
Turn the ignition off.
Disconnect each Glow Plug harness connector.
Disconnect the Glow Plug Module harness connector.
Measure the resistance of each Glow Plug Control circuit between each Glow Plug harness connector and the Glow Plug Module harness connector.
Is the resistance below 10.0 ohms for each circuit?

Yes

- Go To3

No

- Repair the appropriate Glow Plug Control circuit for an open.
- Perform ECM Verification Test Ver. 1. Powertrain Verification Test

3. GLOW PLUG CONTROL CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and each Glow Plug Control circuit at each Glow Plug harness connector.
Is the resistance below 1000 ohms for any of the measurements?

Yes

- Repair the appropriate Glow Plug Control circuit for a short to ground.
- Perform the ECM Verification Test Ver. 1. Powertrain Verification Test

No

- Go To4

4. GLOW PLUG CONTROL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition on.
Measure the voltage of each Glow Plug Control circuit at each Glow Plug harness connector.
Is there voltage present on any of the Glow Plug Control circuits?

Yes

- Repair the appropriate Glow Plug Control circuit for a short to voltage
- Perform the ECM Verification Test Ver. 1. Powertrain Verification Test

No

- Go To5

5. GLOW PLUG
Turn the ignition off.
Connect each Glow Plug connector.
Connect the Glow Plug Module connector.
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Perform the Glow Plug Test on each Glow plug.
Did each Glow Plug pass the test?

Yes

- Go to 6

No

- Replace the appropriate Glow Plug.
- Perform the ECM Verification Test Ver. 1. Powertrain Verification Test

6. GLOW PLUG MODULE
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Glow Plugs and the Glow Plug Module.
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out or corroded terminals.
Search for any Technical Service Bulletins that may apply.
Were any problems found?

Yes

- Repair as necessary.
- Perform the ECM Verification Test Ver. 1. Powertrain Verification Test

No

- Replace the Glow Plug Module.
- Perform the ECM Verification Test Ver. 1. Powertrain Verification Test