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)

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ECM/PCM Reset

NOTE: This is the only information provided by the manufacturer for clearing diagnostic trouble codes.

How to Reset the ECM/PCM

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

See the OBD II 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 under-hood fuse/relay box (B) for 10 seconds.