ECM 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

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 front console.
   Fig 1: Identifying HDS To 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 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 7,16 through 18, and 21 through 22, and do this after replacing the ECM:
   • Replace the engine oil (see ENGINE OIL REPLACEMENT ) and the engine oil filter (see ENGINE OIL FILTER REPLACEMENT ).
   • Clean the throttle body (see THROTTLE BODY CLEANING ).
4. Select the PGM-FI system with the HDS.
5. Select the INSPECTION MENU with the HDS.
6. 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.
7. Select the REPLACE ECM MENU, then select READ DATA, and follow the screen prompts.
   NOTE:

   • Doing this step copies (READS) the engine oil life data from the original ECM so you can later download (WRITES) it into the new ECM.
   • 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 left side kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ) to expose the ECM.
11. Disconnect the ECM connectors (A).
    Fig 2: ECM Connectors And Bolts With Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
12. Remove the bolts (B) then remove the ECM (C).
13. Install the ECM in the reverse order of removal.
14. Turn the ignition switch to ON (II).
15. Manually input the VIN into the ECM with the HDS.
    NOTE: DTC P0630 VIN Not Programmed or Mismatch may be stored because the VIN has not been programmed into the ECM; ignore it, and continue this procedure.
16. If the READ DATA failed in step 7, go to step  19, otherwise to step 17.
17. Select the PGM-FI system with the HDS.
18. Select the REPLACE ECM MENU, then select WRITE DATA, and follow the screen prompts.
    NOTE: If the WRITE DATA indicates FAILED, continue with this procedure.
19. Select the IMMOBI system with the HDS.
20. Enter the immobilizer code that you got from the iN, and use the ECM replacement procedure in the HDS; it allows you to start the engine.
21. If the TP POSITION CHECK failed in step 6 clean the throttle body (see THROTTLE BODY CLEANING ), then go to step  22.
22. If the READ DATA failed in step 7 or the WRITE DATA failed in step 18, replace the engine oil (see ENGINE OIL REPLACEMENT ) and engine oil filter (see ENGINE OIL FILTER REPLACEMENT ), then go to step 23.
23. Select the PGM-FI system, and reset the ECM with the HDS.
24. Update the ECM if it does not have the latest software (see ECM UPDATE ).
25. Do the ECM idle learn procedure (see ECM IDLE LEARN PROCEDURE ).
26. Do the CKP pattern clear/CKP pattern learn procedure (see CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN ).