See Figures 1 and 2
The Engine Control Module (ECM) performs many functions. The module receives data from various engine sensors and computes the required fuel flow rate necessary to maintain correct air/fuel ratio throughout the entire engine operational range.
Based on the data received and information programmed into the ECM's memory, the ECM generates output signals to control relays, actuators and solenoids. The module automatically senses and compensates for any changes in altitude when driving the vehicle.
The ECM consists of a microcomputer, inspection lamps, a diagnostic mode selector, and connectors for signal input, signal output, power supply and ground. The ECM module is located under the center console, near the accelerator pedal.
REMOVAL & INSTALLATION
See Figures 3 and 4
- Disconnect the negative battery cable.
- Remove the lower panel on the center console, if necessary.
- Label and disconnect the ECM electrical harness.
- Remove the ECM mounting screws.
- Carefully remove the ECM from the vehicle.
- Position the ECM in the vehicle and tighten the mounting screws securely.
- Connect the ECM electrical harness.
- Connect the negative battery cable.
- Start the vehicle and verify proper operation.
- Read and clear the ECM trouble code memory.
- Replace the lower panel.