Control Unit Connector
- On all models, turn ignition on and check for voltage at control unit connector Blue wire. Voltage should be present. If voltage is not present, check Blue wire between ignition coil and control unit.
- On all models, turn ignition on and check for voltage at control unit connector Black/Yellow wire. Voltage should be present. If voltage is not present, check wiring and ignition fuse.
- Check Brown/Black (Civic and Prelude models) or Black (Accord models) wire for continuity between control unit and body ground. Continuity should be present.