Operation CHARM: Car repair manuals for everyone.

Preliminary Check





A good understanding of the malfunction conditions can make troubleshooting faster and more accurate. In general, each customer feels differently about a malfunction. It is important to fully understand the symptoms or conditions for a customer complaint.

INFORMATION FROM CUSTOMER
WHAT............ Vehicle model
WHEN............ Date, Frequencies
WHERE........... Road conditions
HOW............. Operating conditions, Symptoms

PRELIMINARY CHECK
Check that the following parts are in good order.

- Battery
- Fuse
- System component-to-harness connections