Dodge Durango (HB). Manual — part 1474
B105A–RECIRCULATION DOOR CONTROL CIRCUIT HIGH (ATC)
HB
HVAC - ELECTRICAL DIAGNOSTICS
24 - 89
B105A–RECIRCULATION DOOR CONTROL CIRCUIT HIGH (ATC) (CONTINUED)
For the Automatic Temperature Control (ATC) circuit diagram (Refer to 24 - HEATING & AIR CONDITIONING -
SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
When the Actuator DTC Detection Test is executed.
•
Set Condition:
If the (C32) Recirculation Door Driver circuit is shorted to voltage.
Possible Causes
(C32) RECIRCULATION DOOR DRIVER CIRCUIT SHORTED TO VOLTAGE
A/C HEATER CONTROL
Theory of Operation
The A/C Heater Control drives the Recirculation Door Actuator via the (C32) Recirculation Door Driver circuit and
the (C34) Common Door Driver 1 circuit. The Recirculation Door Actuator and the Front Blend Door Actuator share
the (C34) Common Door Driver 1 circuit and they share a driver inside the A/C Heater Control. Due to the shared
circuitry similar DTCs can set at the same time for multiple actuators depending upon the type of short, its location,
and the direction the actuator is moving when the short is present.
Diagnostic Test
1.
CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Turn the ignition on.
Measure the voltage of the (C32) Recirculation Door Driver circuit.
Is the voltage above 0.2 volts?
Yes
>> Repair the (C32) Recirculation Door Driver circuit for a
short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 2
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HVAC - ELECTRICAL DIAGNOSTICS
HB
B105A–RECIRCULATION DOOR CONTROL CIRCUIT HIGH (ATC) (CONTINUED)
2.
RUN THE ACTUATOR DTC DETECTION TEST
Turn the ignition off.
Reconnect the A/C Heater Control C1 harness connector.
Turn the ignition on.
With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is com-
plete, select View DTCs.
Does the scan tool only display: B105A–RECIRCULATION DOOR CONTROL CIRCUIT HIGH?
Yes
>> Replace the A/C Heater Control in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No, Other DTC(s) Displayed
Diagnose and repair the other DTC(s). If multiple DTCs are present, beginning with the common cir-
cuits, diagnose and repair all short high DTCs and then all short low DTCs. Refer to the Table of Con-
tents in this Section for a complete list of all HVAC related symptoms.
No, And No Other DTCs Displayed
Using the wiring diagram as a guide, inspect the wiring and connectors for conditions causing an inter-
mittent short. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
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HVAC - ELECTRICAL DIAGNOSTICS
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B105A–RECIRCULATION DOOR CONTROL CIRCUIT HIGH (MTC)
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HVAC - ELECTRICAL DIAGNOSTICS
HB
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