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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Cruise Control: Description and Operation

There are two on-board diagnostic functions:
1. Operation Mode, which checks for and indicates correct operation of the input signals to the control module.
2. Condition Detection Mode, which indicates troubles in the system.

The two functions can be done by using either of the following methods:
- Checking the flashing pattern of the cruise set indicator light in the instrument cluster.
- Checking the output of the data link connector by using the New Generation Star (NGS) tester.