Engine Control Module: Service and Repair
ECM/PCM ReplacementSpecial Tools Required
- Honda diagnostic system (HDS) tablet tester
- Honda interface module (HIM) and an iN workstation with HDS and CM update software
- HDS pocket tester
- GNA600 and an iN workstation with HDS and CM update software
Use any one of these update tools.
1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the ECM/PCM and other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting. Testing and Inspection If you are returning from the DLC circuit troubleshooting, skip steps 5 through 10, 19 through 24, and 27 through 29, and do these procedures after replacing the ECM/PCM:
- Replace the engine oil and the engine oil filter.
- Replace the ATF (A/T model).
- 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/PCM MENU, then READ DATA, and follow the screen prompts.
NOTE:
- Doing this step copies (READS) the engine oil life data from the original ECM/PCM so you can later download (WRITES) it into the new ECM/PCM.
- If READ DATA indicates FAILED, continue with this procedure.
8. A/T models: Select the A/T system with the HDS.
9. A/T models: Select the REPLACE TCM/PCM MENU, then READ DATA, and follow the screen prompts.
NOTE:
- Doing this step copies (READS) the ATF life data from the original PCM so you can later download (WRITES) it into the new PCM.
- If READ DATA indicates FAILED, continue with this procedure.
10. Turn the ignition switch to LOCK (0).
11. Do the battery removal procedure.
12. Remove the bolts (D).
13. Disconnect ECM/PCM connectors A, B, and C, then remove the ECM/PCM assembly (E).
NOTE: ECM/PCM connectors A, B, and C have symbols (A=Square, B=Triangle, C=Circle) embossed on them for identification.
14. Remove the cover (A) and the bracket (B) from the ECM/PCM (C).
15. Install the ECM/PCM in the reverse order of removal.
16. Do the battery installation procedure.
NOTE: While doing the battery installation procedure, do not start the engine.
17. Turn the ignition switch to ON (II).
18. Manually input the VIN to the ECM/PCM with the HDS.
NOTE: DTC P0630 "VIN Not Programmed or Mismatch" may be stored because the VIN has not been programmed into the ECM/PCM; ignore it, and continue this procedure.
19. If the READ DATA (engine oil life) failed in step 8, go to step 22 (A/T model) or step 25 (M/T model). Otherwise, go to step 20.
20. Select the PGM-FI system with the HDS.
21. Select the REPLACE ECM/PCM MENU, then WRITE DATA, and follow the screen prompts.
NOTE: If the WRITE DATA indicates FAILED, continue with this procedure.
22. A/T models: If the READ DATA (ATF life) failed in step 10, go to step 25. Otherwise go to step 23.
23. A/T models: Select the A/T SYSTEM with the HDS.
24. A/T models: Select the REPLACE TCM/PCM MENU, then WRITE DATA, and follow the screen prompts.
NOTE: If the WRITE DATA indicates FAILED, continue with this procedure.
25. Select IMMOBI system with the HDS.
26. Enter the immobilizer code with the ECM/PCM replacement procedure in the HDS; it allows you to start the engine.
27. If the TP POSITION CHECK failed in step 7 clean the throttle body, then go to step 28.
28. If the READ DATA failed in step 8 or the WRITE DATA failed in step 21, replace the engine oil and engine oil filter, then go to step 29 (A/T model) or step 30 (M/T model).
29. If the READ DATA failed in step 10 or the WRITE DATA failed in step 24, replace the ATF, then go to step 30.
30. Select PGM-FI system, and reset the ECM/PCM with the HDS.
31. Update the ECM/PCM if it does not have the latest software.
32. Do the ECM/PCM idle learn procedure.
33. Do the CKP pattern learn procedure.