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
It is located in the engine compartment, attached to the firewall on the driver's side, near the master cylinder.
- Disconnect the negative battery cable.
- Wearing a grounding device, loosen the engine control sensor wiring harness connector retaining bolt and carefully detach the harness connector from the PCM.
- Remove the PCM bracket clip from the module bracket and remove the PCM.
- Wearing a grounding device, install the PCM to the mounting bracket and secure the bracket clip.
- Carefully fit the engine control sensor wiring harness connector to the PCM and secure with the retaining bolt. Torque the retaining bolt to 32 inch lbs. (3.7 Nm).
- Reconnect the negative battery cable.
- Check for proper operation.