PCM Update

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
• GNA600 and an iN workstation with HDS and CM update software

  Use any one of these update tools.

  NOTE:

  • Use this procedure when you need to update the PCM at any time
  • Make sure the HDS/HIM has the latest software version.
  • Before you update the PCM, 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 LOCK (0) or ACC (I) during the update. If there is a problem with the update, leave the ignition switch ON (II).
  • To prevent PCM damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power windows, moonroof (if equipped), door locks, etc.) during the update.
  • To ensure the latest program is installed, do PCM update whenever the PCM is substituted or replaced.
  • You cannot update PCM with a program it already has. It will only accept a new program.
  • High temperature in the engine compartment might cause the PCM to become too hot to run the update. If the engine has been running before this procedure, open the hood and cool the engine compartment.
  • 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 PCM 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.
    3. Make sure the HDS communicates with the 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 and 5, and clean the throttle body (see THROTTLE BODY CLEANING after updating the PCM.
    4. USA, Canada models: Select the INSPECTION MENU with the HDS.
    5. USA, Canada models: Select the ETCS TEST, then select the TP POSITION CHECK, and follow the HDS screen prompts.
    6. Exit the HDS (USA, Canada models). Select the update program, and follow the screen prompts to update the PCM.
    7. If the software in the PCM 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 PCM is not the latest, follow the instructions on the screen. If prompted to choose the PGM-FI system or the A/T system, make sure you update both.
       NOTE: If the PCM update system requires you to cool the PCM, follow the instructions on screen. If you run into a problem during the update procedure (programming takes over 15 minutes, status bar goes over 100 %, D or immobilizer indicator flashes, HDS tablet freezes, etc.), follow these steps to minimize the chance of damaging the PCM:

       • 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 try the update procedure again.
    8. USA, Canada models: If the TP POSITION CHECK failed in step 6, clean the throttle body(see THROTTLE BODY CLEANING ).
    9. Do the PCM idle learn procedure(see PCM IDLE LEARN PROCEDURE ).
    10. Do the CKP pattern learn procedure.