Tracker 4WD V6-2.5L VIN 4 (2001)
Powertrain Control Module: Description and Operation
General Information
Powertrain Control Module (PCM) Description
The Powertrain Control Module (PCM) is a precision unit consisting of a one chip microprocessor, an Analog/Digital (A/D) converter, and an
Input/Output (I/O) unit. The PCM is an essential part of the electronic control system. The PCM is responsible for such major functions as control of the
fuel injectors, the Idle Air Control (IAC) valve, the fuel pump relay, etc. The PCM performs the OBD 2 diagnostic tests of the emission related systems.
The PCM supplies a buffered voltage to the various information sensors and switches. The PCM controls most components with an electronic switch that
completes a ground circuit when turned on. The PCM is also responsible for a self-diagnosis function and a fail-safe function.
The PCM (1) is located below the glove box, underneath the instrument panel, on the right side of the passenger compartment.
