Dodge Durango (HB). Manual — part 1493
B1040–PANEL MODE DOOR 1 CONTROL CIRCUIT/PERFORMANCE (ATC)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
If the A/C Heater Control detects an excessive current draw on the (C29) Mode Door 1 Driver circuit or the
(C807) Common Door Driver 2 circuit while attempting to drive this actuator. This DTC has a maturing time of
5 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
DOOR DRIVER CIRCUIT(S) SHORTED
Theory of Operation
The A/C Heater Control monitors the door driver circuits during actuator operation for shorts to ground, shorts to
battery, and shorts to other door driver circuits. If detected, the A/C Heater Control reports these types of faults as
Control Circuit/Performance DTCs. It is important to note that Control Circuit/Performance DTCs do not indicate
where or what type of short is present and that additional system testing is necessary to provide more details about
the reported fault.
NOTE: The DTC must be active for the results of this test to be valid. Do not perform this test if the DTC is
stored. Refer to HVAC System Test (ATC) for stored DTC test procedures.
Diagnostic Test
1.
RUN THE ACTUATOR DTC DETECTION TEST
With the scan tool, erase HVAC DTCs.
Turn the ignition off, wait 10 seconds, and then turn the ignition on.
With the scan tool, select System Tests and then select Actuator DTC Detection. When the test is complete, select
View DTCs.
Repair
Diagnose and repair the DTC(s). If multiple DTCs are present, beginning with the common circuits, diag-
nose and repair all short high DTCs and then all short low DTCs. Refer to the Table of Contents in this
Section for a complete list of all HVAC related symptoms.
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HVAC - ELECTRICAL DIAGNOSTICS
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B1040–PANEL MODE DOOR 1 CONTROL CIRCUIT/PERFORMANCE (MTC)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
If the A/C Heater Control detects an excessive current draw on any of the door driver circuits while attempting
to drive this actuator. This DTC has a maturing time of 5 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.
If this DTC is active, refer to B104C–BLEND DOOR CONTROL CIRCUIT/PERFORMANCE (MTC) for the diag-
nostic test procedure. If this DTC is stored, refer to HVAC System Test (MTC) for stored DTC test proce-
dures.
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HVAC - ELECTRICAL DIAGNOSTICS
HB
B1041–PANEL MODE DOOR 1 CONTROL CIRCUIT LOW (ATC)
HB
HVAC - ELECTRICAL DIAGNOSTICS
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B1041–PANEL MODE DOOR 1 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 the Actuator DTC Detection Test is executed.
•
Set Condition:
If the (C29) Mode Door 1 Driver circuit is shorted to ground.
Possible Causes
(C29) MODE DOOR 1 DRIVER CIRCUIT SHORTED TO GROUND
(C29) MODE DOOR 1 DRIVER CIRCUIT SHORTED TO OTHER DOOR DRIVER CIRCUIT(S)
MODE DOOR 1 (FLOOR TO PANEL) ACTUATOR
A/C HEATER CONTROL
Theory of Operation
The A/C Heater Control drives the Mode Door 1 (Floor to Panel) Actuator via the (C29) Mode Door 1 Driver circuit
and the (C807) Common Door Driver 2 circuit. The Mode Door 1 (Floor to Panel) Actuator does not share the
(C807) Common Door Driver 2 circuit or its driver inside the A/C Heater Control with any other actuator.
Diagnostic Test
1.
CHECK (C29) MODE DOOR 1 DRIVER CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Measure the resistance of the (C29) Mode Door 1 Driver circuit
between ground and the A/C Heater Control C1 harness connector.
Is the resistance below 10k ohms?
Yes
>> Repair the (C29) Mode Door 1 Driver circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 2
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HVAC - ELECTRICAL DIAGNOSTICS
HB
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