Chrysler 300M 2002 Service Manual page 1977

HEATING & A/C
Symptom:
ATC MIX SWITCH FAILURE
When Monitored and Set Condition:
ATC MIX SWITCH FAILURE
When Monitored: With the ignition on.
Set Condition: The BCM interfaces with the ATC head over the PCI Bus. If an ATC switch
is held in the closed position for longer than 5 to 10 minutes, a switch failed code will be
set.
ATC HEAD SWITCH STUCK
ATC HEAD - ERASE DTC- RESET
TEST
1 Turn the ignition on.
With the DRB select Automatic Temp Control, Input/output and observe the switch
state.
Do any of the switch states read Closed?
Yes → Replace the Automatic Temperature Control Head.
→ Using the DRB, erase the trouble code and Reset Module (under
No
POSSIBLE CAUSES
ACTION
Perform BODY VERIFICATION TEST - VER 1.
miscellaneous).
Perform BODY VERIFICATION TEST - VER 1.
254
APPLICABILITY
All