Power Circuits
- Check for battery voltage between ECM power terminal and ground. See POWER & GROUND CIRCUIT TERMINAL IDENTIFICATION table. See Fig 1 . If battery voltage does not exist, check appropriate ECM fuse in underhood fuse box. See ECM POWER CIRCUIT 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 CIRCUIT TERMINAL IDENTIFICATION
table. If battery voltage does not exist, check appropriate fuse in underhood fuse box. See ECM POWER CIRCUIT FUSE IDENTIFICATION
table. If fuse is okay, check for open in wire between fuse box and appropriate ECM power circuit terminal, and check for defective ignition switch.POWER & GROUND CIRCUIT 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 CIRCUIT FUSE IDENTIFICATIONApplication Fuse Prelude Ignition Switch In OFF Position CLOCK Ignition Switch In ON Position BACK-UP