10V may not be enough for proper function.
Autozone'* tester is a joke. Don't trust it'* results either positive or negative:
The ICM in that topic was bad out of the box. But his original ICM was tested as BAD by Autozone, and when I replaced the FUSE that caused his problem (on the passneger side at the base of the A pillar above the hushpanel), I installed his so-called BAD ICM, and the car is running fine to this day.
Bad test good, and good test bad. Testing ICM'* is a joke. Scanners can't test ICM'* or coils either.