Powertrain Control Module

Passive Anti-Theft System (PATS) uses Powertrain Control Module (PCM) to enable vehicle's engine from starting. PCM is located behind right front kick panel. See Figure. Instrument cluster communicates with the PCM over the Standard Corporate Protocol (SCP) network in order to enable engine operation. Instrument cluster and PCM use sophisticated messages in order to prevent a theft. Instrument cluster and PCM share security data (when first installed together) that makes them a matched pair. After this security data sharing, these modules will not function in other vehicles. The shared PCM ID is remembered even if the battery is disconnected. Instrument cluster also stores the vehicle's key identification code even if the battery is disconnected. There are special diagnostic procedures that may be carried out if either a new instrument cluster or PCM needs to be installed.