Chrysler Sebring, Stratus sedan, Sebring Convertible. Manual — part 72
Symptom:
A/C MODE DOOR INPUT SHORTED TO BATTERY - MTC
When Monitored and Set Condition:
A/C MODE DOOR INPUT SHORTED TO BATTERY - MTC
When Monitored:
With the engine running.
Set Condition:
The BCM reads the signal from the A/C - Heater Control mode request and
positions the mode door accordingly. If the voltage on this pin exceeds 90% of ignition
voltage, the DTC will set, and the BCM will place the mode door in a default position.
POSSIBLE CAUSES
CONTROL HEAD - A/C MODE SWITCH MUX SHORTED TO VOLTAGE
A/C MODE SWITCH MUX CIRCUIT SHORTED TO VOLTAGE
BODY CONTROL MODULE - A/C MODE SWITCH MUX SHORTED TO VOLTAGE
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, record and erase Body Computer DTC’s.
Turn the ignition off.
Disconnect the A/C - Heater Control C1 harness connector.
Turn the ignition on.
Measure the voltage of the A/C Mode Switch MUX circuit.
Is the voltage above 0.3 volts?
All
Yes
→ Go To 2
No
→ Replace the A/C - Heater Control in accordance with the Service
Information.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the A/C - Heater Control C1 harness connector.
Disconnect the Body Control Module C2 harness connector.
Turn the ignition on.
Measure the voltage of the A/C Mode Switch MUX circuit.
Is there any voltage present?
All
Yes
→ Repair the A/C Mode Switch MUX circuit for a short to voltage.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace and program the Body Control Module in accordance
with the Service Information.
Calibration must be performed after repair/replacement is com-
pleted.
Perform BODY VERIFICATION TEST - VER 1.
273
HEATING & A/C
Symptom List:
A/C SWITCH FAILURE - ATC
AUTO SWITCH FAILURE - ATC
BILEVEL SWITCH FAILURE - ATC
DEFROST SWITCH FAILURE - ATC
EBL SWITCH FAILURE - ATC
FLOOR SWITCH FAILURE - ATC
MIX SWITCH FAILURE - ATC
OFF SWITCH FAILURE - ATC
PANEL SWITCH FAILURE - ATC
RECIRC SWITCH FAILURE - ATC
TEMP DOWN FAILURE - ATC
TEMP UP FAILURE - ATC
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be A/C SWITCH FAILURE - ATC.
When Monitored and Set Condition:
A/C SWITCH FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the A/C switch is held in the closed position for 10
minutes. The BCM will store this DTC. The DRBIII
t will display this DTC in either BCM
or Automatic Temperature Control.
AUTO SWITCH FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the Auto switch is held in the closed position for 10
minutes. The BCM will store this DTC. The DRBIII
t will display this DTC in either BCM
or Automatic Temperature Control.
BILEVEL SWITCH FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the Bilevel switch is held in the closed position for 10
minutes. The BCM will store this DTC. The DRBIII
t will display this DTC in either BCM
or Automatic Temperature Control.
DEFROST SWITCH FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the Defrost switch is held in the closed position for 10
minutes. The BCM will store this DTC. The DRBIII
t will display this DTC in either BCM
or Automatic Temperature Control.
274
HEATING & A/C
EBL SWITCH FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the EBL switch is held in the closed position for 10
minutes. The BCM will store this DTC. The DRBIII
t will display this DTC in either BCM
or Automatic Temperature Control.
FLOOR SWITCH FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the Floor switch is held in the closed position for 10
minutes. The BCM will store this DTC. The DRBIII
t will display this DTC in either BCM
or Automatic Temperature Control.
MIX SWITCH FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the Mix switch is held in the closed position for 10
minutes. The BCM will store this DTC. The DRBIII
t will display this DTC in either BCM
or Automatic Temperature Control.
OFF SWITCH FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the Off switch is held in the closed position for 10
minutes. The BCM will store this DTC. The DRBIII
t will display this DTC in either BCM
or Automatic Temperature Control.
PANEL SWITCH FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the Panel switch is held in the closed position for 10
minutes. The BCM will store this DTC. The DRBIII
t will display this DTC in either BCM
or Automatic Temperature Control.
RECIRC SWITCH FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the Recirculation switch is held in the closed position
for 10 minutes. The BCM will store this DTC. The DRBIII
t will display this DTC in either
BCM or Automatic Temperature Control.
TEMP DOWN FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the Temperature Down switch is held in the closed
position for 10 minutes. The BCM will store this DTC. The DRBIII
t will display this DTC
in either BCM or Automatic Temperature Control.
275
HEATING & A/C
A/C SWITCH FAILURE - ATC —
Continued
TEMP UP FAILURE - ATC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the Temperature Up switch is held in the closed
position for 10 minutes. The BCM will store this DTC. The DRBIII
t will display this DTC
in either BCM or Automatic Temperature Control.
POSSIBLE CAUSES
AUTOMATIC TEMPERATURE CONTROL
AUTOMATIC TEMPERATURE CONTROL
AUTOMATIC TEMPERATURE CONTROL
AUTOMATIC TEMPERATURE CONTROL
INTERMITTENT CONDITION
TEST
ACTION
APPLICABILITY
1
Which switch failure code is present?
All
Other than Temp Up/Temp Down Failure
Temp Up/Temp Down Failure
2
Turn the ignition on.
With the DRBIII
t in Automatic Temperature Control, Inputs/Outputs, read the
switch states.
Do any of the switch states read Closed?
All
Yes
→ Replace the Automatic Temperature Control in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition on.
With the DRBIII
t in Automatic Temperature Control, Inputs/Outputs, read the
switch states while pressing and then releasing the Auto; Off; A/C; Recirc; Panel;
Floor; Mix; Bilevel; EBL; and Defrost buttons on the ATC.
Do any of the switch states remain Closed?
All
Yes
→ Replace the Automatic Temperature Control in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 5
276
HEATING & A/C
A/C SWITCH FAILURE - ATC —
Continued
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