Engine Control Module: Service and Repair

ENGINE CONTROL MODULE (ECM) REPLACEMENT

1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.

IMPORTANT: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100 percent. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5 000 km (3,000 mi) from the last engine oil change.




2. Disconnect the negative battery cable.
3. Disconnect the intake air temperature (IAT) sensor.
4. Loosen the clamp at the air cleaner assembly.
5. Remove the push pin attachment from the outlet resonator/duct assembly to support bracket.
6. Loosen the clamp at the throttle body assembly.
7. Disconnect the positive crankcase ventilation (PCV) fresh air hose at the cam cover.
8. Remove the outlet resonator/duct assembly.
9. Remove the J 1 and J 2 connectors at the engine control module (ECM).
10. Remove the 4 ECM attachment bolts.

INSTALLATION PROCEDURE




1. Install the ECM.
2. Install the ECM bolts.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the engine control module bolts to 8 N.m (71 lb in).

3. Connect the J 1 and J 2 ECM electrical connectors.
4. Install the outlet resonator/duct assembly into position.
5. Connect the PCV fresh air vent hose assembly.
6. Tighten the clamp at the throttle body assembly.
7. Position the outlet resonator/duct assembly up with the support bracket and install the push-pin.
8. Tighten the clamp at the air cleaner assembly.
9. Connect the IAT sensor connector.
10. Connect the negative battery cable.
11. Program the ECM. Refer to Control Module References in Computer/Integrating Systems.

NOTE: If a new ECM is being installed, it must be reprogrammed with new software and calibrations. Refer to Service Stall System (SSS) User Guide for reprogramming procedures. The ECM may be damaged if the reprogramming process is interrupted. Make sure the scan tool is connected securely to the DLC and the vehicle battery has sufficient charge.

IMPORTANT: Ensure the original ECM has the correct VIN and vehicle options.

12. Perform the Passlock Relearn Procedure using the SSS.

IMPORTANT: The new ECM must learn the passlock password from the body control module (BCM). When the ECM reprogram is completed, use the Service Stall System (SSS) to perform the ECM Passlock Relearn Procedure. Programming and Relearning

13. Turn the ignition to OFF for 10 seconds.