11. Glow Plug System Operation: Purpose:
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Ford RV Cutaway, 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
The purpose of this test is to verify the glow plug system operation.
Glow Plug System Operation
- Glow Plug Control Module (GPCM) Operation
- Glow plug on time is dependent on oil temperature and altitude. The GPCM commands the glow plugs on for 1 to 120 seconds. The GPCM does not operate if the oil temperature is above 55°C (131°F).
- Connect the scan tool. Access and retrieve the KOEO and continuous DTCs. If GPCM DTCs are present, refer to PINPOINT TEST AF - GLOW PLUG SYSTEM .
- Verify B+ voltage is supplied to the GPCM.
- Access and monitor the GPCTM and EOT PIDS to verify sufficient glow plug ON time.
- Turn the key to the ON position and measure the glow plug voltage (ON time).
NOTE:
The wait to start indicator on time (1-10 seconds) is independent from glow plug on time.
| On Time | Specification | Measurement |
|---|---|---|
| 1 to 120 seconds | B+ |
- Glow Plug Resistance
- Disconnect the glow plug bus bar connector.
- Measure the resistance between the glow plug bus bar connector, component side and battery ground.
- Disconnect the GPCM.
- Measure the resistance between the GPCM connector, harness side and the glow plug bus bar connector, harness side.
Glow Plug Number Glow Plug to Ground (0.1 to 2 ohms) Glow Plug Connector to GPCM Connector (less than 5 ohms) 1 3 5 7 2 4 6 8