Engine Control Module: Service and Repair

ECM Replacement

NOTE:
- Make sure the HDS is loaded with the latest software version.
- If you are replacing the ECM after substituting a known-good ECM, reinstall the original ECM, then do this procedure.
- During the procedure, is any READ DATA, WRITE DATA, or other data checks fail, note the failure, then continue.




1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of front console.
2. Turn the ignition switch ON (II).
3. Make sure the HDS communicates with the ECM and other vehicle systems. If it doesn't, Go to the DLC circuit troubleshooting. Testing and Inspection
If you are returning from DLC circuit troubleshooting, skip steps 4 through 7 and 18 through 19, and do the following procedure after replacing the ECM.
- Replace the engine oil and the engine oil filter.
- Clean the throttle body.

4. Select the PGM-FI system with the HDS.
5. Select the INSPECTION MENU with the HDS.
6. Select the ETCS TEST, then select the TP POSITION CHECK, and follow the screen prompts.

NOTE: If the TP POSITION CHECK indicates FAILED, continue with this procedure.

7. Select the REPLACE ECM MENU, then READ DATA and follow the screen prompts.

NOTE:
- Doing this step copies (READS) the engine oil life data from the original ECM so you can later download (WRITES) it into the new ECM.
- If READ DATA indicates FAILED, continue with this procedure.

8. Turn the ignition switch OFF.
9. Jump the SCS line with the HDS.
10. Remove the left side kick panel to expose the ECM.




11. Disconnect the ECM connectors (A).
12. Remove the bolts (B) then remove the ECM (C).
13. Install the ECM in the reverse order of removal.
14. Open the SCS with the HDS.
15. Turn the ignition switch ON (II).

NOTE: DTC P0630 "VIN Not Programmed or Mismatch" may be stored because the VIN has not been programmed into the ECM; ignore it, and continue this procedure.

16. Manually input the VIN to the ECM with the HDS.
17. If READ DATA failed in step 6, Go to step 20, otherwise to step 18.
18. Select the PGM-FI system with the HDS.
19. Select the REPLACE ECM MENU, then WRITE DATA and follow the screen prompts.

NOTE: If the WRITE DATA indicates FAILED, continue with this procedure.

20. Select IMMOBI system with the HDS.
21. Enter the immobilizer code with the ECM replacement procedure in the HDS; it allows you to start the engine.
22. If the TP POSITION CHECK failed in step 7 clean the throttle body, then Go to step 23.
23. If the READ DATA failed in step 7 or the WRITE DATA failed in step 19, replace the engine oil and engine oil filter, then Go to step 25.
24. Select PGM-FI system and reset the ECM with the HDS.
25. Update the ECM if it does not have the latest software.
26. Do the ECM idle learn procedure.
27. Do the CKP pattern learn procedure.