Operation CHARM: Car repair manuals for everyone.
Home >> Mazda >> 1990 >> 323 L4-1600 1597cc >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Service and Repair
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: Service and Repair

Trim Removal:




1. Disconnect negative battery cable
2. Remove side walls, drivers and passenger's side.

ECU Removal:




3. Remove the bolts and nuts.
4. Disconnect the ECU connectors.
5. Install a new ECU in the reverse order of removal.
pro multis · About Operation CHARM