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

Test J: The Autolock Does Not Operate Correctly

PINPOINT TEST J: THE AUTOLOCK DOES NOT OPERATE CORRECTLY


J1:






J2-J4:






Normal Operation
The generic electronic module (GEM) energizes the lock or unlock relays based upon input from the ajar switches, the transmission range (TR) sensor, and the vehicle speed signal. The GEM locks the doors when it senses the doors are closed and the vehicle is in motion, and the door lock actuators lock the doors.

Possible Causes
- door ajar switches
- vehicle speed signal
- TR sensor
- GEM