The electronic control panel? EATC is an electronic module and cannot be repaired? I think it would be easier to buy a new module. Than track down a wiring diagram for the insides of this module? Could I ask what is exactly wrong with your heater system? A common fault on this vehicle is the blend door getting stuck. And not letting heat into the vehicle ?
ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE
The EATC module is part of the climate control panel, which consists of temperature selection buttons, digital display window, system and rear fan on-off buttons, AUTOMATIC button, blower speed control thumbwheel, and mode control (manual override) buttons.
EATC system can be operated in full automatic mode by pressing AUTOMATIC button, or system can be manually operated by selecting one of following mode control (manual override) buttons: MAX A/C, VENT, PNL/FLR, FLOOR, FLR-DEF and DEF. See Fig. 1.
Pressing button sets EATC system in full automatic mode. The set temperature will be shown in the EATC display window. System maintains set temperature by controlling airflow direction, airflow quantity and discharge temperature required for comfort.
If warm air discharge is requested during cold weather, blower motor will remain off until engine is warm enough to provide warm discharge air. If maximum cooling is required, EATC system will automatically recirculate air inside vehicle, and then as vehicle interior approaches set temperature, it will automatically switch to outside air. See Fig. 2.
Saturday, November 29th, 2008 AT 6:29 PM