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)
Or, hide this message:
temporarily or
permanently
Gather Information
Gather information from all resources available to pinpoint the "when", "where", "why", and "how" of the symptom. Road test with the customer when possible to completely understand the symptom. Compare the symptom to a similar vehicle to verify this is an abnormal condition. Find out (when applicable) grade of fuel and where purchased, maintenance history (oil changes. etc.), typical driving cycle, etc. Perform a bulletin search focusing on specific symptoms.