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

BARO

The scan tool displays 10-105 kPa (0-5 volts). The Barometric Pressure (BARO) reading is determined from the Manifold Absolute Pressure (MAP) sensor signal monitored during key up and Wide-Open Throttle (WOT) conditions. The BARO is used in order to adjust the fuel delivery, and to spark advance in order to compensate for altitude changes.