Turn ignition off. Disconnect Ignition Control Module (ICM) 8-pin harness connector. Check for continuity between ground and ICM harness connector terminals No. 2 (Black wire) and No. 7 (Black wire). See Fig 1 . If continuity exists, go to next step. If continuity does not exist, repair open in Black wire between ICM and ground.
Turn ignition on. Measure voltage between ground and ICM harness connector terminals No. 1 (White/Black wire), No. 3 (White/Green wire), No. 4 (White wire), No. 5 (White/Red wire), No. 6 (Red/Green wire), and No. 8 (White/Blue wire). See appropriate wiring diagram under ENGINE PERFORMANCE in WIRING DIAGRAMS.
If battery voltage exists at all indicated terminals, replace ICM. If battery voltage does not exist at all terminals, check for a blown No. 25 IG-COIL (30-amp) fuse located in underdash fuse/relay box.
If battery voltage does not exist at a specific terminal, check for open or shorted circuit between ignition coil and ICM harness connector. If circuit is okay, substitute suspect ignition coil with known-good coil.

Fig 1: Identifying ICM Harness Connector Terminals (3.5RL)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Ignition Control Module Input Test (3.5RL)