Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 2307
3.
CHECK THE MODE DOOR & A/C HEATER HOUSING FOR WARPED, WORN, DAMAGED, MISSING, &
BROKEN COMPONENTS
Inspect for excessively worn, disconnected, missing, or broken door linkage. Inspect for a damaged or broken A/C
Heater Housing Assembly. Inspect for a warped or broken door, and missing door seals. Rotate the door from stop
to stop. The door should rotate approximately 240 degrees.
Are there any physical or mechanical problems with the door or housing?
Yes
>> Repair as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING).
No
>> Replace the Mode Door Actuator in accordance with the Service Information. Then, Go To 4.
4.
RUN THE ACTUATOR THE CALIBRATION TEST
Turn the ignition on.
With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select
View DTCs.
Does the scan tool display: B1045–PANEL MODE DOOR 1 TRAVEL RANGE TOO LARGE?
Yes
>> Replace the A/C Heater Control in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING).
No
>> Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING).
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B1058–RECIRCULATION DOOR CONTROL CIRCUIT/PERFORMANCE (ATC)
For a complete wiring diagram Refer to Section 8W.
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HVAC - ELECTRICAL DIAGNOSTICS
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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.
•
When Monitored:
When driving the Recirculation Door Actuator.
•
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 door actuator.
Possible Causes
DOOR DRIVER CIRCUIT(S) SHORTED TO VOLTAGE
DOOR DRIVER CIRCUIT(S) SHORTED TO GROUND
DOOR DRIVER CIRCUITS SHORTED TOGETHER
DOOR ACTUATOR(S)
A/C HEATER CONTROL
NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC
is stored. Refer to HVAC System Test (ATC) for stored DTC test procedures.
Diagnostic Test
1.
CHECK THE DOOR DRIVER CIRCUITS FOR A SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the A/C Heater Control C2 harness connector.
Turn the ignition on.
Measure the voltage of the (C266) Mode Door Driver circuit, the (C66)
Mode Door Common Driver circuit, the (C255) Left Blend Door Driver
circuit, the (C55) Left Blend Door Common Driver circuit, the (C252)
Right Blend Door Driver circuit, the (C52) Right Blend Door Common
Driver circuit, the (C268) Recirculation Door Driver circuit, and the (C68)
Recirculation Door Common Driver circuit.
Is the voltage above 0.2 volts on any of the circuits?
Yes
>> Repair all circuits with voltage above 0.2 volts for a short to
voltage.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).
No
>> Go To 2
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2.
CHECK THE DOOR DRIVER CIRCUITS FOR A SHORT TO GROUND
Turn the ignition off.
Measure the resistance of the (C266) Mode Door Driver circuit, the
(C66) Mode Door Common Driver circuit, the (C255) Left Blend Door
Driver circuit, the (C55) Left Blend Door Common Driver circuit, the
(C252) Right Blend Door Driver circuit, the (C52) Right Blend Door
Common Driver circuit, the (C268) Recirculation Door Driver circuit, and
the (C68) Recirculation Door Common Driver circuit between ground
and the A/C Heater Control C2 harness connector.
Is the resistance below 10k ohms on any of the circuits?
Yes
>> Repair all circuits with a resistance below 10k ohms for a
short to ground.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).
No
>> Go To 3
3.
CHECK THE (C266) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C255) LEFT BLEND DOOR
DRIVER CIRCUIT, THE (C55) LEFT BLEND DOOR COMMON DRIVER CIRCUIT, THE (C252) RIGHT BLEND
DOOR DRIVER CIRCUIT, THE (C52) RIGHT BLEND DOOR COMMON DRIVER CIRCUIT, THE (C268)
RECIRCULATION DOOR DRIVER CIRCUIT, & THE (C68) RECIRCULATION DOOR COMMON DRIVER
CIRCUIT
Measure the resistance between the (C266) Mode Door Driver circuit
and the (C255) Left Blend Door Driver circuit, the (C55) Left Blend
Door Common Driver circuit, the (C252) Right Blend Door Driver circuit,
the (C52) Right Blend Door Common Driver circuit, the (C268) Recir-
culation Door Driver circuit, and the (C68) Recirculation Door Common
Driver circuit.
Is the resistance below 10k ohms on any of the circuits?
Yes
>> Repair all circuits with a resistance below 10k ohms for a
short to the (C266) Mode Door Driver circuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).
No
>> Go To 4
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