Substituting the ECM/PCM

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*

*Available through the Honda Tool and Equipment Program at 888-424-8857.

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 all other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ). If you are returning from DLC circuit troubleshooting, skip steps 4 and  5, then the clean the throttle body after substituting the ECM/PCM.
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. Turn the ignition switch to LOCK (0).
8. Remove auxiliary under-hood fuse/relay box A.
   Fig 2: Removing Auxiliary Under-Hood Fuse/Relay Box

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
9. Remove the battery hold-down plate (B), then move the battery (C) forward.
10. Remove the ECM/PCM cover (D).
11. Remove the bolts (D).
    Fig 3: ECM/PCM, ECM/PCM Connectors And Bolts With Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
12. 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= , C=◦) embossed on them for identification.
13. Install a known-good ECM/PCM in the reverse order of removal.
14. Turn the ignition switch to 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.
15. Manually input the VIN to the ECM/PCM with the HDS.
16. Select the IMMOBI SYSTEM with the HDS.
17. 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.
18. If the TP POSITION CHECK failed in step  5, clean the throttle body (see THROTTLE POSITION LEARNING CHECK ).
19. Reset the ECM/PCM with the HDS.
20. Update the ECM/PCM if it does not have the latest software (see ELD REPLACEMENT ).
21. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
    NOTE: If the IMA battery level gauge displays no segments, start the engine, and hold it between 3, 500-4, 000 RPM without load (CVT in P or N, M/T in neutral) until the level gauge displays at least half of its segments.
22. Do the CKP pattern clear/CKP pattern learn procedure.
23. CVT: Do the start clutch control calibration procedure (see START CLUTCH PRESSURE CONTROL CALIBRATION PROCEDURES ).