Ignition Control Module Input Test
WARNING: This page is about a different car, the 1999 Acura Integra, 1999 Acura 3.5RL, 1999 Acura 3.2TL, 1999 Acura 3.0CL, and 1999 Acura 2.3CL. However, it is still accessible from the selected car via links, so may be relevant.
- 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 (White/Yellow wire on 3.2TL; Red/Green wire on 3.5RL), and No. 8 (White/Blue wire).
- If battery voltage exists at all indicated terminals, replace ICM. If battery voltage does not exist at all terminals, check for a blown IG-COIL fuse No. 25 (30-amp) located in underdash fuse panel.
- 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.