ECM/PCM Replacement

Special Tools Required 

Use any one of these update tools

• Honda diagnostic system (HDS) tablet tester
• Honda interface module (HIM) and an iN workstation with HDS and CM update software
• HDS pocket tester
• GNA600 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 (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 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 9,19 through 24, and 27 through 29, and do these procedures after replacing the ECM/PCM
   • USA, Canada models Replace the engine oil (see ENGINE OIL REPLACEMENT ) and the engine oil filter (see ENGINE OIL FILTER REPLACEMENT )
   • USA, Canada models Replace the ATF (A/T) (see ATF REPLACEMENT )
   • USA, Canada models Clean the throttle body (see THROTTLE BODY CLEANING )
4. USA, Canada models Select the PGM-FI system with the HDS
5. USA, Canada models Select the INSPECTION MENU with the HDS
6. USA, Canada models Select the ETCS TEST, then select the TP POSITION CHECK, and follow the screen prompts
   NOTE: USA, Canada models If the TP POSITION CHECK indicates FAILED, continue with this procedure
7. USA, Canada models Select the REPLACE ECM/PCM MENU, then READ DATA, and follow the screen prompts
   NOTE:

   • USA, Canada models 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
   • USA, Canada models If READ DATA indicates FAILED, continue with this procedure
8. USA, Canada (A/T) models Select the A/T system with the HDS
9. USA, Canada (A/T) models Select the REPLACE TCM/PCM MENU, then READ DATA, and follow the screen prompts
   NOTE:

   • USA, Canada (A/T) models Doing this step copies (READS) the ATF life data from the original PCM so you can later download (WRITES) it into the new PCM
   • USA, Canada (A/T) models If READ DATA indicates FAILED, continue with this procedure
10. Jump the SCS line with the HDS
11. Turn the ignition switch to LOCK (0)
12. Remove the ECM/PCM cover (A)
    Fig 2: Identifying ECM/PCM Cover With Battery Setting Plate

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
13. Remove the battery setting plate (B), and reposition the battery away from the ECM/PCM
    NOTE: Do not disconnect the battery terminals
14. Remove the bolts (D)
    Fig 3: ECM/PCM Connectors With Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
15. 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= Δ, C=◦) embossed on them for identification
    • Canada model When disconnecting the ECM/PCM connectors, remove the ECM/PCM sub bracket (F)
16. Install a known-good ECM/PCM in the reverse order of removal
17. Turn the ignition switch to 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. USA, Canada models If the READ DATA (engine oil life) failed in step  7, go to step  22 (A/T) or step  25 (M/T) Otherwise, go to step 20
20. USA, Canada models Select the PGM-FI system with the HDS
21. USA, Canada models Select the REPLACE ECM/PCM MENU, then WRITE DATA, and follow the screen prompts
    NOTE: USA, Canada models If the WRITE DATA indicates FAILED, continue with this procedure
22. USA, Canada (A/T) models If the READ DATA (ATF life) failed in step  8, go to step  25 Otherwise go to step 23
23. USA, Canada (A/T) models Select the A/T SYSTEM with the HDS
24. USA, Canada (A/T) models Select the REPLACE TCM/PCM MENU, then WRITE DATA, and follow the screen prompts
    NOTE: USA, Canada (A/T) models If the WRITE DATA indicates FAILED, continue with this procedure
25. Select IMMOBI system with the HDS
26. Enter the immobilizer code that you obtained from iN or ISIS, it allows you to start the engine
27. USA, Canada models If the TP POSITION CHECK failed in step 6 clean the throttle body (see THROTTLE BODY CLEANING ), then go to step 28
28. USA, Canada models If the READ DATA failed in step 7 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) or step 30 (M/T)
29. USA, Canada (A/T) models If the READ DATA failed in step 9 or the WRITE DATA failed in step 24, 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 ECM/PCM UPDATE )
32. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE )
33. Do the CKP pattern learn procedure (see CKP PATTERN CLEAR/CKP PATTERN LEARN )