ECM/PCM 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
• MVCI unit with the latest control module (CM) update software installed

Any one of the above updating tools can be used.

1. Connect 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), or press the engine start/stop button to select the ON mode.
3. Make sure the HDS communicates with the ECM/PCM and other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting . If you are returning from the DLC circuit troubleshooting, skip steps 4 through 9, 17 through 22, and 25 through 27, and do this after replacing the ECM/PCM:
   • Replace the engine oil (see ENGINE OIL LEVEL CHECK ) and the engine oil filter (see ENGINE OIL FILTER REPLACEMENT ).
   • Replace the ATF (A/T) (see ATF 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 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. A/T: Select the A/T system with the HDS.
9. A/T: Select the REPLACE TCM/PCM MENU, then select READ DATA, and follow the screen prompts.
   NOTE:

   • Doing this step copies (READS) the ATF life data from the original PCM so you can later download (WRITES) it into the new PCM.
   • If READ DATA indicates FAILED, continue with this procedure.
10. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
11. Jump the SCS line with the HDS.
12. Disconnect ECM/PCM connectors A, B, and C, then remove the ECM/PCM assembly (D).
    NOTE: ECM/PCM connectors A, B, and C have symbols (A=□, B=Δ, C=◦) embossed on them for identification.