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 logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

Tac/PCM Communication Signal

The scan tool displays OK or FAULT. If the communication between the Throttle Actuator Control (TAC) module and the PCM is interrupted the scan tool displays FAULT. The scan tool displays OK under the normal operating conditions.