MCM Updating For Testing

MCM Updating for Testing

Special Tools Required
Honda Interface Module (HIM) EQS05A35570

Use this procedure when you have to substitute a known-good MCM in a troubleshooting procedure. Update the MCM only if the MCM does not have the latest software loaded.

NOTE: Do not turn the ignition switch OFF while updating the MCM. If you turn the ignition switch OFF before completion, the MCM can be damaged.

How to Update the MCM

NOTE:
^ To ensure the latest program is installed, do an MCM update whenever the MCM is substituted or replaced.
^ 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 ECM idle learn procedure.