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Originally Posted by Jed Rule
The ECM has nothing to do with the operation of the climate control system. This car does not even have an ECM. It uses a PCM.
In this case, the HVAC programmer is the brain of the dual-zone a/c system. A microprocessor in the programmer receives signals from the control head and sensors, and sends commands to the components which control the temperature and air flow.
I cannot find any reference to your problem in the shop manual. Previous postings by persons more experienced then me gave this proceedure for resetting climate control problems in the absence of a Tech I. :
Turn key on.
Press OFF button.
Key off.
Wait one minute.
Turn key on but do not start engine.
Wait three minutes.
Cross fingers.
Start engine.
Hope this helps.
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Listen PCM, ECM, CCM, who cares, ON BOARD COMPUTER...... BOTTOM LINE..