The Powertrain Control Module (PCM) performs many functions on your vehicle. The module accepts information from various sensors and computes the required fuel flow rate necessary to maintain the correct amount of air/fuel ratio throughout the entire engine operational range and controls the shifting of the transmission.
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 module automatically senses and compensates for any changes in altitude when driving your vehicle.
Removal & Installation
- Disconnect the negative battery cable.
- Remove the 2 retainers from the PCM close out panel below the instrument panel (I/P) glove box.
- Swing the PCM close out panel down.
- Open the I/P compartment.
- Push in on both sides of the I/P compartment in order to release the safety catches.
- Remove the I/P compartment door assembly from the I/P.
- Remove the 2 PCM bracket fasteners.
- Pull the PCM with brackets toward you and swing both down away from under the I/P.
- Disconnect the four PCM electrical connectors.
Remove the four fasteners and the two brackets from the PCM.
NOTEDo not touch the connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD) damage to the PCM.
NOTETurn the ignition OFF when installing or removing the PCM connectors and disconnecting or reconnecting the power to the PCM (battery cable, PCM pigtail, PCM fuse, jumper cables, etc.) in order to prevent internal PCM damage.
- Installation is the reverse of removal.
- Program the vehicle identification number (VIN) to the replacement PCM.
- Install a scan tool.
- Clear the scan tool information.
- Turn OFF the ignition, in order to initialize the powertrain control module (PCM).
- Turn ON the ignition.
- Wait 10 seconds and check for DTCs.
- If DTC P0606 sets, check for a short to ground at the 5 volt reference circuit.
- If DTC-s P0601, P0604, P0607 or P2610 set, replace the PCM.