See Figure 1
The Powertrain Control Module (PCM) performs many functions on your vehicle. The module accepts information from various engine sensors and computes the required fuel flow rate necessary to maintain the correct amount of air/fuel ratio throughout the entire engine operational range.
Based on the information that is received and programmed into the PCM's memory, the PCM generates output signals to control relays, actuators and solenoids. The PCM also sends out a command to the fuel injectors that meters the appropriate quantity of fuel. The module automatically senses and compensates for any changes in altitude when driving your vehicle.
REMOVAL & INSTALLATION
See Figure 2
- Disconnect the negative battery cable.
- Remove the cowl deflector.
- Remove the screw securing the ground cable of the engine control harness to the dash panel.
- Loosen the engine control wiring harness-to-PCM retaining bolt.
- Remove the engine control wiring harness from the PCM.
- Remove the retaining nuts from the PCM insulator and remove the PCM insulator.
- Remove the PCM.
- The installation is the reverse of removal.