The Engine Control Unit/Powertrain Control Module (ECU/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
- Disconnect the negative battery cable.
- Remove the glove box, right side kickpanel and lower panel assemblies.
- Unplug the connectors and remove fasteners. Remove the PCM.
- Installation is the reverse of the removal procedure.
- If equipped, disarm the air bag system.
- Remove the passenger side lower instrument panel and shower duct.
- Remove the glove box striker, glove box, glove box outer casing and the screw below the assembly.
- Unplug wiring connector and remove mounting hardware. Slide out the PCM.
- Install the PCM with the mounting hardware.
- Attach the wire connector.
- Install the glove box striker, the glove box, the glove box casing and the screw below the assembly.
- Install the passenger side lower instrument panel and the shower duct.
- Reconnect the negative battery cable.