Glow Plug System: Testing and Inspection

Note regarding preglow circuit:
An electronic short circuit protection feature is installed in the preglow time-limit relay module. If a short circuit occurs in the glow plugs or the wires to the glow plugs, the current is interrupted.

The preglow time-limit relay module is again operational if the short circuit is eliminated and the glow/starter switch is turned to position "0".

A malfunction of a glow plug is not indicated by the preglow indicator lamp.

For Glow Plug System diagnostic trouble code testing refer to Computers and Control Systems - Testing and Inspection - Procedures

Testing and Inspection