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ECM/PCM Replacement

NOTE:
  • Make sure the HDS is loaded with the latest software version.
  • If you are replacing the ECM/PCM after substituting a known-good ECM/PCM, reinstall the original ECM/PCM, then do this procedure.
  • During the procedure, is any READ DATA, WRITE DATA, or other data checks fail, note the failure, then continue.
  1. Make sure you have the anti-theft code for the audio or the navigation system (if equipped).
  2. 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
    G06264645Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Turn the ignition switch ON (II).
  4. Make sure the HDS communicates with the ECM/PCM. If it doesn't, go to the DLC CIRCUIT TROUBLESHOOTING  . If you are returning from DLC circuit troubleshooting, skip steps 5 through  10,  19 through  24, and  27 through  29, and do these procedures after replacing the ECM/PCM;
  5. Select the PGM-FI system with the HDS.
  6. Select the INSPECTION MENU with the HDS.
  7. 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.
  8. 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.
  9. A/T model: Select the A/T system with the HDS.
  10. A/T model: 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.
  11. Turn the ignition switch OFF.
  12. Remove the battery.
  13. Remove the cover (A).
    Fig 2: Identifying Battery Cover
    G06264646Courtesy of AMERICAN HONDA MOTOR CO., INC.
  14. Remove the bolts (D), then remove the ECM/PCM (E).
    Fig 3: Identifying ECM/PCM And Bolts
    G06264647Courtesy of AMERICAN HONDA MOTOR CO., INC.
  15. Disconnect ECM/PCM connectors A, B, and C.
    NOTE: ECM/PCM connectors A, B, and C have symbols (A=□, B= Δ, C=◦) embossed on them for identification.
  16. Install the parts in the reverse order of removal.
  17. Turn the ignition switch 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 model: If the READ DATA (ATF life) failed in step  10, go to step  25. Otherwise go to step 23.
  23. A/T model: Select the A/T SYSTEM with the HDS.
  24. A/T model: 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 (see THROTTLE BODY CLEANING ), 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 (see ENGINE OIL REPLACEMENT ) and engine oil filter (see ENGINE OIL FILTER REPLACEMENT ), 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  26, replace the ATF (see ATF REPLACEMENT ), 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 (see UPDATING THE ECM/PCM ).
  32. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
  33. Do the CKP pattern learn procedure (see HDS CLEAR COMMAND ).
  34. Enter the anti-theft code for the audio and or the navigation system (if equipped), then set the clock (if needed).
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