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

Engine ID Code Description

Fig. 30 Self-test code output format. Engine identification codes:





Engine identification codes are issued at the beginning of the engine running test and are one digit numbers represented by the number of pulses transmitted. The engine identification code is equal to the number of engine cylinders when the number is multiplied by two and the zero dropped. These codes are used to verify that the proper processor is installed and that the self-test has been entered, Fig. 30.