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)

Or, hide this message: temporarily or permanently

Diagnostic Flow Chart

Diagnostic Flow Chart





^ Know and understand the customer concerns.
^ Check the transmission fluid level and condition.
^ Verify the concern by operating the vehicle.
^ Check for non-factory-installed items and verify correct installation.
^ Check the selector lever linkage adjustments.
^ Check TSBs for vehicle concerns.
^ Carry out quick test both key ON engine running (KOER) and key ON engine OFF (KOEO).
^ Record all codes.

Diagnostic Flow Chart (Part 1):




Diagnostic Flow Chart (Part 2):