How to Reset the ECM/PCM

How to Update the ECM/PCM

NOTE:
- To ensure the latest program is installed, do an ECM/PCM update whenever the ECM/PCM is substituted or replaced.
- You can not update an ECM/PCM with the program it already has. It will only accept a new program.
- Before you update the ECM/PCM, make sure the vehicle's battery is fully charged.
- To prevent ECM/PCM damage, do not operate anything electrical (audio system, brakes, A/C, power windows, moonroof, 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 ECM/PCM damage.

1. Turn the ignition switch ON (II). Do not start the engine.




2. Connect the Honda Interface Module (HIM) to the data link connector (DLC) (A) located under the driver's side of dashboard.
3. Do the ECM/PCM update procedure as described on the HIM label and in the ECM/PCM update system. If the software in the ECM/PCM is the latest, replace the ECM/PCM


How to Reset the ECM/PCM

You can reset the ECM/PCM in either of two ways:
- Use the scan tool or Honda PGM Tester to clear the ECM's/PCM's memory.

See the scan tool or Honda PGM Tester user's manuals for specific instructions.




- Turn the ignition switch OFF, and remove the No.6 ECU (ECM/PCM) (15 A)fuse (A) from the underhood fuse/relay box (B) for 10 seconds.