How to Update the MCM

How to Update the MCM

NOTE:
^ To ensure the latest programs are installed, do an MCM update whenever the MCM is substituted or replaced.
^ Select IMA motor and/or IMA battery in the HIM MCM update menu.
^ You can not update an MCM with the program it already has. It will only accept a new program.
^ Before you update the MCM, make sure the vehicle's battery is fully charged.
^ To prevent MCM damage, do not operate anything electrical (audio system, brakes, A/C, power windows, door locks, etc.) during the update.
^ 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 the ON (II) position when you disconnect the HIM from the data link connector (DLC). This will prevent MCM damage.

1. Turn the ignition switch ON (II). Do not start the engine.
2. Connect the HDS or the Honda Interface Module (HIM) to the data link connector (DLC) (A) located under the driver's side of dashboard.





3. Do the MCM update procedure as described on the HIM label and in the MCM update system.
4. Do the PCM idle learn procedure.