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

MAP Sensor (Bussed Input)

The MAP Sensor provides engine load input directly to the PCM, which determines engine torque load on the transaxle input shaft. These signals are broadcast over the communication bus to the TCM. The TCM uses this information to modify shifting and reduce 2-3 and 3-4 shift hunting on grades.