ECM/PCM Replacement

Special Tools Required 

• Honda diagnostic system (HDS) tablet tester
• Honda interface module (HIM) and an iN workstation with HDS and CM update software
• HDS pocket tester
• GNA-600 and an iN workstation with HDS and CM update software

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

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
2. Turn the ignition switch ON (II).
3. Make sure the HDS communicates with the ECM/PCM and other vehicle systems. If it does not, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING (PART 2)  ). If you are returning from DLC circuit troubleshooting, skip steps 4 through 7 and 18 through 20, and do the following procedure after replacing the ECM/PCM.
   • 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/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 ECM/PCM so you can later download (WRITES) it into the new ECM/PCM.
   • If READ DATA indicates FAILED, continue with this procedure.
8. Turn the ignition switch OFF.
9. Jump the SCS line with the HDS.
10. Pull back the carpet.
11. Remove the ducts (A).
    Fig 2: ECM/PCM With Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
12. Disconnect the ECM/PCM connectors (B).
13. Remove the bolts (C), then remove the ECM/PCM (D).
14. Install the parts in the reverse order of removal.
15. Open the SCS line with the HDS.
16. Turn the ignition switch ON (II).
17. Manually input the VIN into 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.
18. If the READ DATA (engine oil life) failed in step  7, go to step  21. Otherwise, go to step 19.
19. Select the PGM-FI system with the HDS.
20. Select the REPLACE ECM/PCM MENU, then WRITE DATA and follow the screen prompt.
    NOTE: If the WRITE DATA indicates FAILED, continue with this procedure.
21. Select IMMOBI system with the HDS.
22. Enter the immobilizer code with the ECM/PCM replacement procedure in the HDS; it allows you to start the engine.
23. If the TP POSITION CHECK failed in step  6, clean the throttle body (see THROTTLE BODY CLEANING ), then go to step 24.
24. If the READ DATA failed in step  7 or the WRITE DATA failed in step  20, replace the engine oil (see ENGINE OIL REPLACEMENT ), and engine oil filter (see ENGINE OIL FILTER REPLACEMENT ), then go to step 25.
25. Select PGM-FI system, and reset the ECM/PCM with the HDS.
26. Update the ECM/PCM if it does not have the latest software (see UPDATING THE ECM/PCM ).
27. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
28. Do the CKP pattern learn procedure (see CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN ).