Power Circuits
- Check for battery voltage between ECM power terminal and ground. See POWER & GROUND CIRCUITS TERMINAL IDENTIFICATION table. See Fig 1 . If battery voltage does not exist, check appropriate ECM fuse in underhood fuse box. See ECM POWER CIRCUITS FUSE IDENTIFICATION table. If fuse is okay, check for an open in wire between underhood fuse box and appropriate ECM power circuit terminal.
- Turn ignition on. Check for battery voltage between appropriate ECM power circuit terminal and ground. See POWER & GROUND CIRCUITS TERMINAL IDENTIFICATION
table. If battery voltage does not exist, check appropriate fuse in underhood fuse box. See ECM POWER CIRCUITS FUSE IDENTIFICATION
table. If fuse is okay, check for an open in wire between fuse box and appropriate ECM power circuit terminal and check for a defective ignition switch.POWER & GROUND CIRCUITS TERMINAL IDENTIFICATION
Application (1) ECM Terminal Ground Circuits A23, A24, A26 & B2 Power Circuits Ignition Switch In OFF Position D1 Ignition Switch In ON Position A25 & B1 (1) For terminal location, see Fig 1 . ECM POWER CIRCUITS FUSE IDENTIFICATIONApplication Fuse Accord, Civic & Civic Del Sol Ignition Switch In OFF Position BACK-UP Ignition Switch In ON Position ECM Prelude Ignition Switch In OFF Position CLOCK Ignition Switch In ON Position BACK-UP