Glow Plugs - PCM-Controlled
The glow plugs are located in the cylinder heads, under the glow plug wiring harness.
The glow plugs are self-regulating. If the engine oil temperature is above 55°C (13°F), the PCM will bulb-check the WAIT-TO-START lamp but not energize the glow plug relay.
The glow plug ON time varies from 0-120 seconds depending on battery voltage, engine oil temperature and barometric pressure.
The glow plug ON time is independent of the WAIT-TO-START lamp ON time.
The glow plug control monitor system is designed to find failed glow plugs or failed wiring in the glow plug system.