Dodge Durango (HB). Manual — part 1481
B105F–CLIMATE CONTROL MOTOR(S) COMMON 1 CONTROL CIRCUIT LOW (MTC) (CONTINUED)
8.
CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON DOOR
DRIVER CIRCUIT
Disconnect the Mode Door 2 (Floor to Defrost) Actuator harness con-
nector.
Measure the resistance between the (C801) Mode Door 2 Driver cir-
cuit and the (C34) Front Common Door Driver circuit in the A/C Heater
Control C1 harness connector.
Is the resistance below 10k ohms?
Yes
>> Repair the (C801) Mode Door 2 Driver Circuit for a short
to the (C34) Front Common Door Driver circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Mode Door 2 (Floor to Defrost) Actuator in
accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
9.
CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE
Measure the resistance between the (C32) Recirculation Door Driver
circuit and the (C34) Front Common Door Driver circuit in the A/C
Heater Control C1 harness connector.
Is the resistance below 30 ohms?
Yes
>> Go To 10
No
>> Go To 11
HB
HVAC - ELECTRICAL DIAGNOSTICS
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B105F–CLIMATE CONTROL MOTOR(S) COMMON 1 CONTROL CIRCUIT LOW (MTC) (CONTINUED)
10.
CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON
DOOR DRIVER CIRCUIT
Disconnect the Recirculation Door Actuator harness connector.
Measure the resistance between the (C32) Recirculation Door Driver
circuit and the (C34) Front Common Door Driver circuit in the A/C
Heater Control C1 harness connector.
Is the resistance below 10k ohms?
Yes
>> Repair the (C32) Recirculation Door Driver circuit for a
short to the (C34) Front Common Door Driver circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Recirculation Door Actuator in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
11.
RUN THE ACTUATOR DTC DETECTION TEST
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: B105F–CLIMATE CONTROL MOTOR(S) COMMON 1 CONTROL CIRCUIT
LOW?
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 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
HB
B107E–AUXILIARY COOLANT PUMP CONTROL CIRCUIT LOW (ATC)
HB
HVAC - ELECTRICAL DIAGNOSTICS
24 - 119
B107E–AUXILIARY COOLANT PUMP CONTROL CIRCUIT LOW (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 Auxiliary Coolant Pump operation is requested.
•
Set Condition:
If the (C43) Auxiliary Coolant Pump Driver circuit is shorted to ground. This DTC has a maturing time of 10
seconds and a de-maturing time of 10 seconds. If the DTC’s status changes from active to stored it will stay
in memory for 100 ignition cycles.
Possible Causes
(C43) AUXILIARY COOLANT PUMP DRIVER CIRCUIT SHORTED TO GROUND
AUXILIARY COOLANT PUMP
A/C HEATER CONTROL
Theory of Operation
The protected Auxiliary Coolant Pump Driver is set low when turned off and set high when turned on. The Auxiliary
Coolant Pump Driver will go low if the driver circuit is shorted to ground.
NOTE: DTC B107E must be active for the results of this test to be valid. Do not perform this test if DTC
B107E is stored. Refer to HVAC System Test (ATC) for stored DTC test procedures.
Diagnostic Test
1.
CHECK FOR DTC B107E–AUXILIARY COOLANT PUMP CONTROL CIRCUIT LOW WITH AUXILIARY
COOLANT PUMP DISCONNECTED
Turn the ignition on.
Set the blend control to full cold.
With the scan tool, erase HVAC DTCs.
Turn the ignition off.
Disconnect the Auxiliary Coolant Pump harness connector.
Turn the ignition on.
With the scan tool, select the following: Actuators, Auxiliary Coolant
Pump, Start, and Constant On. Allow the actuator to run for approxi-
mately one minute.
With the scan tool, read HVAC DTCs.
Does the scan tool display: B1080–AUXILIARY COOLANT PUMP
CONTROL CIRCUIT OPEN?
Yes
>> Replace the Auxiliary Coolant Pump in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 2
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HVAC - ELECTRICAL DIAGNOSTICS
HB
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