How to Update the PCM

How to Update the PCM

NOTE:
- To ensure the latest program is installed, do a PCM update whenever the PCM is substituted or replaced.
- You cannot update a PCM with the program it already has. It will only accept a new program.
- Before you update the PCM, make sure the vehicle's battery is fully charged.
- To prevent PCM damage, do not operate any electrical system (audio system, brakes, air conditioning, power windows, moonroof, and door locks) 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 PCM 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 DLC (A) located under the left end of the dash.
3. Do the PCM update procedure as described on the HIM label and in the PCM update system.
4. Do the PCM idle learn procedure.
5. Do the CKP pattern clear/pattern learn procedure.