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Substituting the ECM/PCM

Special Tools Required 

NOTE: Use this procedure when you have to substitute a known-good ECM/PCM during troubleshooting procedures.
  1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
    Fig 1: Connecting HDS To DLC
    G05454430Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Turn the ignition switch ON (II).
  3. Make sure the HDS communicates with the ECM/PCM and the vehicle systems. If it doesn't, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING (PART 1) ). If you are returning from DLC circuit troubleshooting, skip steps 4 thru 5, then clean the throttle body after substituting the ECM/PCM (see THROTTLE BODY CLEANING ).
  4. Select the INSPECTION MENU with the HDS.
  5. Select the ETCS TEST, then select the TP POSITION CHECK and follow the screen prompts.
    NOTE: If the TP POSITION CHECK indicates FAILED, continue this procedure.
  6. Jump the SCS line with the HDS.
  7. Remove the passenger's dashboard under cover (see PASSENGER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ), the side kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ), and the glove box (see GLOVE BOX REMOVAL/INSTALLATION ).
  8. Disconnect the connectors (A), and remove the bolts (B), then remove the ECM/PCM (C).
    Fig 2: ECM/PCM Bolt With Torque Specification
    G05454431Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. Install the ECM/PCM in the reverse order of removal.
  10. Open the SCS with the HDS.
  11. Turn the ignition switch ON (II).
    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.
  12. Manually input the VIN to the ECM/PCM with the HDS.
  13. Update the ECM/PCM if it does not have the latest software.
  14. Select the IMMOBI SYSTEM with the HDS.
  15. Enter the immobilizer code with the ECM/PCM replacement procedure in the HDS; it allows you to start the engine.
  16. Reset the ECM/PCM with the HDS.
  17. If the TP POSITION CHECK failed in step 5, clean the throttle body (see THROTTLE BODY CLEANING ).
  18. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
  19. Do the CKP pattern learn procedure.
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