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

Engine Control Module

HFM-SFI SEQUENTIAL MULTIPORT FUEL INJECTION/ IGNITION SYSTEM

Connector View, N3/4:






Connector 1 (Interior Compartment)

Pin Information, Part 1:




Pin Information, Part 2:






Connector 2 (Engine Compartment)

Pin Information, Part 1:




Pin Information, Part 2:







All values measure to ground unless otherwise noted.