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ECM Update

Special Tools Required 

Any one of the above updating tools can be used.

NOTE:
  • Make sure the HDS/iN workstation has the latest HDS software version.
  • Before you update the ECM, make sure the battery in the vehicle is fully charged, and connect a jumper battery (not a battery charger) to maintain system voltage.
  • Never turn the ignition switch to ACC (I) or to LOCK (0) during the update. If there is a problem with the update, leave the ignition switch in ON (II).
  • To prevent ECM damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power windows, door locks, etc.) during the update.
  • To ensure the latest program is installed, update the ECM whenever it is substituted or replaced.
  • You cannot update the ECM with a program it already has. It will only accept a new program.
  • If you need to diagnose the Honda interface module (HIM) because the HIM's red (# 3) light came on or was flashing during the update, leave the ignition switch in ON (II) when you disconnect the HIM from the data link connector (DLC). This will prevent ECM damage.
  1. Turn the ignition switch to ON (II), but do not start the engine.
  2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
    Fig 1: Identifying HDS To Data Link Connector (DLC)
    G06231782Courtesy of AMERICAN HONDA MOTOR CO., INC.
  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 and 5, then clean the throttle body after updating the ECM (see THROTTLE BODY CLEANING ).
  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. Exit the HDS, then select the update mode, and follow the screen prompts to update the ECM.
  7. If the software in the ECM is the latest, disconnect the HDS/HIM from the DLC, and go back to the procedure that you were doing. If the software in the ECM is not the latest, follow the instructions on the screen. If prompted to choose the PGM-FI system, make sure you also update that system.
    NOTE: If the ECM update system requires you to cool the ECM, follow the screen prompts. If you have a problem (programming takes over 15 minutes, status bar goes over 100 %, or immobilizer indicator flashes, HDS tablet freezes, etc.) during the update, follow these steps to minimize the chance of damaging the ECM:
    • Leave the ignition switch in the ON (II) position.
    • Connect a jumper battery (do not connect a battery charger).
    • Shut down the HDS.
    • Disconnect the HDS from the DLC.
    • Reboot the HDS.
    • Reconnect the HDS to the DLC, and do the update again.
  8. If the TP POSITION CHECK failed in step 5, clean the throttle body (see THROTTLE BODY CLEANING ).
  9. Do the ECM idle learn procedure (see ECM IDLE LEARN PROCEDURE ).
  10. Do the CKP pattern clear/CKP pattern learn procedure (see CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN ).
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