Good evening I have completed the checks in the faq. For checking the ICM . The blue wire has no continuity. It states check open between ingniter and the tach or a/t control. How do I check for open between tack orA/T unit. And what is the A/t unit. Thanks for any help

Mark m:eek:

See first post here:
https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-4.html#post265896

I recommend that you replace the ICM and coil every 120,000 miles or 10 years, whichever comes first:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-4.html#post265896

Bench testing ICMs and coils is not reliable. I've had too many that tested okay that didn't work at all. If they tested bad, they were bad. The problem is that some that tested okay were bad. If the problem persists, install your new ICM and coil in a new genuine Honda distributor housing. The internal sensors (CKP, CYL, and TDC) can go bad over time.