Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

PCM Updating and Substitution For Testing

PCM Updating and Substitution for Testing

Special Tools Required
^ Honda diagnosis system (HDS) TDSGD2200
^ Honda interface module (HIM) EQS05A35570
^ HDS pocket tester TDSS3557011401
These special tools are available through the American Honda Tool and Equipment Program 1-888-424-6857.

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

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