Glow Plug System

The PCM uses various inputs to determine when glow plug operation is required. PCM uses relay to operate the glow plugs. The glow plug relay is mounted at rear of left cylinder head.

A normally operating system works as follows: at room temperature with ignition on and engine off, the glow plugs come on for 4-6 seconds and then go off for about 3 seconds. The glow plugs then cycle on for about one second and off for about 4.5 seconds, for a total start sequence of about 16 seconds. If the engine is cranked during or after start sequence, the glow plugs will cycle on and off for a total of 16 seconds after the ignition switch is returned from the crank position, whether engine starts or not.