ECM/PCM Replacement

Special Tools Required 

• Honda diagnostic system (HDS) tablet tester
• Honda Interface Module (HIM) and an iN workstation with the latest HDS software version
• HDS pocket tester
• GNA600 and an iN workstation with the latest HDS software version
• MVCI unit with the latest control module (CM) update software installed

Any one of above updating tools can be used.

1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
   Fig 1: Identifying Data Link Connector

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
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  . If you are returning from the DLC circuit troubleshooting, skip steps 4 through  7, 17 through  22, and  25 through  26, and do this after replacing the ECM/PCM:
   • Replace the engine oil (see OIL PRESSURE TEST ) and the engine oil filter (see ENGINE OIL FILTER REPLACEMENT ).
   • Replace the ATF (A/T model) (see ATF REPLACEMENT ).
   • Clean the throttle body (see THROTTLE BODY CLEANING ).
4. Select the PGM-FI system with the HDS.
5. 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.
6. A/T models: Select the A/T system with the HDS.
7. A/T models: Select the REPLACE TCM/PCM MENU, then select 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.
8. Turn the ignition switch to LOCK (0).
9. Do the battery removal procedure (see BATTERY REMOVAL AND INSTALLATION ).
10. Remove the bolts (D).
    Fig 2: ECM/PCM Connector With Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
11. 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=□, B= , C=◦) embossed on them for identification.
12. Remove the cover (A) and the bracket (B) from the ECM/PCM (C).
    Fig 3: Cover, Bracket And ECM/PCM With Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
13. Install the ECM/PCM in the reverse order of removal.
14. Do the battery installation procedure (see BATTERY REMOVAL AND INSTALLATION ).
15. Turn the ignition switch to ON (II).
16. 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.
17. If the READ DATA (engine oil life) failed in step  7, go to step  20 (A/T model) or step  23 (M/T model). Otherwise, go to step 18.
18. Select the PGM-FI system with the HDS.
19. Select the REPLACE ECM/PCM MENU, then select WRITE DATA, and follow the screen prompts.
    NOTE: If the WRITE DATA indicates FAILED, continue with this procedure.
20. A/T models: If the READ DATA (ATF life) failed in step  7, go to step  23. Otherwise go to step 21.
21. A/T models: Select the A/T SYSTEM with the HDS.
22. A/T models: Select the REPLACE TCM/PCM MENU, then select WRITE DATA, and follow the screen prompts.
    NOTE: If the WRITE DATA indicates FAILED, continue with this procedure.
23. Select IMMOBI system with the HDS.
24. Enter the immobilizer ECM/PCM code that you got from the iN, and use the ECM/PCM replacement procedure in the IMMOBI MENU of the HDS; it allows you to start the engine.
25. If the READ DATA failed in step  5 or the WRITE DATA failed in step  19, replace the engine oil (see OIL PRESSURE TEST ) and engine oil filter (see ENGINE OIL FILTER REPLACEMENT ), then go to step 26 (A/T model) or step  27 (M/T model).
26. A/T models: If the READ DATA failed in step  7 or the WRITE DATA failed in step  22, replace the ATF (see ATF REPLACEMENT ), then go to step 27.
27. Select PGM-FI system, and reset the ECM/PCM with the HDS.
28. Clean the throttle body (see THROTTLE BODY CLEANING ).
29. Update the ECM/PCM if it does not have the latest software (see ECM/PCM UPDATE  ).
30. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
31. Do the CKP pattern clear/CKP pattern learn procedure (see CKP PATTERN CLEAR/CKP PATTERN LEARN ).