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 the 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 (DLC)

   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 (see DLC CIRCUIT TROUBLESHOOTING ). If you are returning from the DLC circuit troubleshooting, skip steps 4 through 9, 19 through 24, and 27 through 29, and do these procedures after replacing the ECM/PCM:
   • Replace the engine oil (see ENGINE OIL REPLACEMENT ) and the engine oil filter (see ENGINE OIL FILTER REPLACEMENT ).
   • Replace the ATF (A/T) (see ATF REPLACEMENT ).
   • Clean the throttle body (see AIR CLEANER REMOVAL/INSTALLATION ).
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: Select the A/T system with the HDS.
7. A/T: Select the REPLACE TCM/PCM MENU, then READ DATA, and follow the screen prompts.
   NOTE:

   • A/T: Doing this step copies (READS) the ATF life data from the original PCM so you can later download (WRITES) it into the new PCM.
   • A/T: If READ DATA indicates FAILED, continue with this procedure.
8. Turn the ignition switch to LOCK (0).
9. Jump the SCS line with the HDS.
10. Remove the ECM/PCM cover (A).
    Fig 2: Removing Battery Setting Plate

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
11. Remove the battery setting plate (B), and reposition the battery away from the ECM/PCM.
    NOTE: Do not disconnect the battery terminals.
12. Remove the bolts (D).
    Fig 3: Disconnecting ECM/PCM Connectors

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
13. Disconnect ECM/PCM connectors A, B, and C, then remove the ECM/PCM (E).
    NOTE:

    • ECM/PCM connectors A, B, and C have symbols (A=□, B=Δ, C=◦) embossed on them for identification.
    • Canada model: When disconnecting the ECM/PCM connectors, remove the ECM/PCM sub bracket (F).
14. Install the parts in the reverse order of removal.
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  5, go to step  20 (A/T) or step  23 (M/T). Otherwise, go to step 18.
18. Select the PGM-FI system with the HDS.
19. 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.
20. A/T: If the READ DATA (ATF life) failed in step  6, go to step  23. Otherwise go to step 23.
21. A/T: Select the A/T SYSTEM with the HDS.
22. A/T: Select the REPLACE TCM/PCM MENU, then WRITE DATA, and follow the screen prompts.
    NOTE: A/T: 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 7, or the WRITE DATA failed in step 22, replace the engine oil (see ENGINE OIL REPLACEMENT ) and engine oil filter (see ENGINE OIL FILTER REPLACEMENT ), then go to step 26 (A/T) or step  27 (M/T).
26. A/T: 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 ).