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.

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Link: lemon-manuals.la

System Inputs

The following inputs are used by the Transmission Control Module (TCM) to determine proper vehicle shift points.
- Circuit K22 is used to provide the TCM with the throttle position
- Circuit K4 is used to provide the throttle position sensor ground to the Powertrain Control Module (PCM)
- Circuit K24 is used to provide the TCM with the engine speed input