Test 2A: Inoperative ATC Control Head Switch

WARNING: This page is about a different car, the 1998 Dodge Intrepid and 1998 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Perform TEST 1B: IDENTIFYING ATC SYSTEM BCM DIAGNOSTIC TROUBLE CODES before proceeding with this test. A failed ATC control head switch code will set when a switch is in closed position for 5-10 minutes.

NOTE: Test each switch, in turn, while switch name is displayed on scan tool. Use appropriate switch name in place of references to SWITCH in following steps. See Figure .

Using scan tool, clear DTCs and select AUTOMATIC TEMP CONTROL, INPUT/OUTPUTS and read ATC SWITCH. If scan tool displays SWITCH: OPEN, go to next step. If scan tool does not display SWITCH: OPEN, replace ATC control head. Perform VERIFICATION TEST .
Press and hold ATC control head button. Using scan tool, read ATC SWITCH. If scan tool does not display SWITCH: OPEN, switch is operating properly at this time. If scan tool displays SWITCH: OPEN, replace ATC HEAD. Perform VERIFICATION TEST .