Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Glow Plug Relay: Testing and Inspection

The diagnosis of the glow plug relay is part of the "Control Module System" and starts with the "On-Board Diagnostic System Check." This will determine if the system is operating correctly. If the glow plug system is not working properly, the On-Board Diagnostic System Check will direct diagnosis to a Diagnostic Trouble Code (DTC) tree chart or to another system circuit. Refer to C-Charts/Computers and Control Systems. Testing and Inspection