Engine Control Module: Service and Repair

ENGINE CONTROL MODULE (ECM) REPLACEMENT




1. Disconnect the negative battery cable.
2. Disconnect the intake air temperature (IAT) sensor.
3. Loosen the clamp at the air cleaner assembly.
4. Remove the push pin attachment from the outlet resonator/duct assembly to support bracket.
5. Loosen the clamp at the throttle body assembly.
6. Disconnect the PCV fresh air hose at the cam cover.
7. Remove the outlet resonator/duct assembly.
8. Remove the J 1 and J 2 connectors at the ECM.
9. 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 intake air temperature (IAT) sensor connector.
10. Connect the negative battery cable.
11. Reprogram the ECM. Programming and Relearning

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 Service Stall System (SSS). Programming and Relearning

IMPORTANT: The new ECM must learn the passlock password from the BCM. When the ECM reprogram is completed, use the SSS to perform the ECM Passlock Relearn Procedure.

13. Turn the ignition to OFF for 10 seconds.
14. Perform the crankshaft relearn procedure. Refer to CKP System Variation Learn Procedure. Programming and Relearning

IMPORTANT: Following the ECM reprogramming, the ECM will have to learn the crankshaft notch variation for misfire diagnostics.

15. Verify no DTCs exist. If one exists, refer to the specific DTC diagnostic.