Automatic Temperature Control (ATC)
Disable the airbag system before attempting any steering wheel, steering column or instrument panel component diagnosis or service. Disconnect and isolate the negative battery (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to follow these instructions may result in accidental airbag deployment and possible serious or fatal injury.
On vehicles equipped with the high voltage system, disconnecting the 12-volt battery negative cable alone will not power down the 12-volt system. You must perform the 12-volt Power Down procedure before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
- Disconnect and isolate the 12-volt negative battery cable.
- Power down the high-voltage system. Refer to ELECTRIC VEHICLE CONTROL SYSTEM, STANDARD PROCEDURE .
- Using Trim Stick (special tool #C-4755, Trim Stick) or equivalent (3), disengage the retaining tabs that secure the control panel (1) to the A/C heater control and remove the control panel from the instrument panel (2).
- Disconnect the HVAC wire harness connector (2) from the accessory switch pod (1) and remove the control panel (3).
- Remove the instrument panel center bezel. Refer to BEZEL, INSTRUMENT PANEL, CENTER, REMOVAL .
- Remove the four screws (2, 3, 5 and 6) that secure the A/C heater control (1) to the instrument panel cover (4).
- Remove the instrument panel cover. Refer to COVER, INSTRUMENT PANEL, REMOVAL .
- Disconnect the HVAC wire harness connector (2) from the A/C heater control (1) and remove the control.