Automatic Temperature Control (ATC) Systems

IMPORTANT NOTE: The control head cannot display all diagnostic trouble codes stored with in the body controller. There may be other diagnostic trouble codes in the body controller that are or are not related to the ATC system. These codes can only be found using the DRB II scan tool.

Below is a list of the trouble codes that can be retrieved from the control head:

CODE DESCRIPTION
NUMBER

23 A/C Blend Door Feedback Failure
24 A/C Mode Door Feedback Failure
25 Ambient Sensor
26 ATC In-Car Sensor
27 Sun Sensor Failure
31 A/C Recirculation Door Stall Failure
32 ATC Blend Door Stall Failure
33 ATC Mode Door Stall Failure
34 Engine Temperature Message not Received
35 Evaporator Sensor Failure
36 ATC Head Communication Failure

Below is a list of the trouble codes that can be retrieved using the DRB II. The DRB II lists trouble codes by their name, NOT by code numbers:

ATC A/C Switch Failed
ATC Ambient Temp Sensor Failure
ATC Auto Switch Failed
ATC Bi-level Switch Failed
ATC Blend Door Feedback Failure
ATC Blend Door Output Short to B+
ATC Blend Door Output Short to Gnd
ATC Blend Door Stall Failure
ATC Common Door Output Short to B+
ATC Common Door Output Short to Gnd
ATC Defrost Switch Failed
ATC EBL Switch Failed
ATC Floor Switch Failed
ATC Head CCD Comm Failure
ATC Head Comm Test Failed
ATC Head Status Message Not Received
ATC In Car Sensor Failure
ATC Mix Switch Failed
ATC Mode Door Feedback Failure
ATC Mode Door Output Short to B+
ATC Mode Door Output Short to Gnd
ATC Mode Door Stall Failure
ATC Off Switch Failed
ATC Panel Switch Failed
ATC Rec Door Output Short to B+
ATC Rec Door Output Short to Gnd
ATC Recirculation Door Stall Failure
ATC Recirculation Switch Failed
ATC Sun Load Sensor Failure