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 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 PCM and all other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ). If the result of the DLC circuit troubleshooting is to replace the PCM, skip steps  4 through  7,  18 through  23, and  26 through  27, and do this after replacing the PCM:
   • Replace the engine oil (see ENGINE OIL REPLACEMENT ) and the engine oil filter (see ENGINE OIL FILTER REPLACEMENT ).
   • Replace the ATF; 5-speed A/T model (see ATF REPLACEMENT ), 6-speed A/T model (see ATF REPLACEMENT ).
4. Select the PGM-FI system with the HDS.
5. Select the REPLACE PCM MENU, then select READ DATA, and follow the screen prompts.
   NOTE:

   • Doing this step copies (READS) the engine oil life data from the original PCM so you can later download (WRITES) it into the new PCM.
   • If the READ DATA indicates FAILED, continue with this procedure.
6. Select the A/T system with the HDS.
7. 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. Jump the SCS line with the HDS.
10. Remove the cover (D).
    Fig 2: Disconnecting PCM Connectors With Torque Specifications (Keihin PCM)

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 3: Disconnecting PCM Connectors With Torque Specifications (Continental PCM)

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
11. Disconnect PCM connectors A, B, and C.
    NOTE: PCM connectors A, B, and C have symbols (A=□, B=Δ, C=◦) embossed on them for identification.
12. Keihin PCM: Loosen or remove the bolts (E), then remove the PCM (F).
13. Continental PCM: Remove the nuts (G), then remove the PCM (F).
14. Continental PCM: Remove the spacers (H).
15. Install the PCM in the reverse order or removal.
16. Turn the ignition switch to ON (II).
17. Manually input the VIN to the PCM with the HDS.
    NOTE: DTC P0630 (VIN Not Programmed or Mismatch) may be stored because the VIN has not been programmed into the PCM; ignore it, and continue this procedure.
18. If the READ DATA (engine oil life) failed in step  5, go to step  21. Otherwise, go to step 19.
19. Select the PGM-FI system with the HDS.
20. Select the REPLACE PCM MENU, then select WRITE DATA, and follow the screen prompts.
    NOTE: If the WRITE DATA indicates FAILED, continue with this procedure.
21. If the READ DATA (ATF life) failed in step  7, go to step  24. Otherwise go to step 22.
22. Select the A/T SYSTEM with the HDS.
23. 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.
24. Select the IMMOBI system with the HDS.
25. Enter the immobilizer PCM code that you got from the iN, and use the PCM replacement procedure in the IMMOBI Menu of the HDS; it allows you to start the engine.
26. If the READ DATA failed in step  5 or the WRITE DATA failed in step  20, replace the engine oil (see ENGINE OIL REPLACEMENT ) and the engine oil filter (see ENGINE OIL FILTER REPLACEMENT ), then go to step 28.
27. If the READ DATA failed in step  7 or the WRITE DATA failed in step  23, replace the ATF; 5-speed A/T model (see ATF REPLACEMENT ), 6-speed A/T model (see ATF REPLACEMENT ), then go to step 28.
28. Select the PGM-FI system, and reset the PCM with the HDS.
29. Clean the throttle body (see THROTTLE BODY CLEANING ).
30. Update the PCM if it does not have the latest software (see PCM UPDATE  ).
31. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
32. Do the CKP pattern clear/CKP pattern learn procedure (see CKP PATTERN CLEAR/CKP PATTERN LEARN ).