Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 2283
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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HVAC - ELECTRICAL DIAGNOSTICS
LX
4.
CHECK THE (C66) MODE DOOR COMMON 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 (C66) Mode Door Common 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)
Recirculation 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 (C66) Mode Door Common 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 5
5.
CHECK THE (C255) LEFT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO 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 (C255) Left Blend Door Driver cir-
cuit and 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 resistance below 10k ohms on any of the circuits?
Yes
>> Repair all circuits with a resistance below 10k ohms for a
short to (C255) Left Blend 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 6
LX
HVAC - ELECTRICAL DIAGNOSTICS
24 - 167
6.
CHECK THE (C55) LEFT BLEND DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO 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 (C55) Left Blend Door Common
Driver circuit and 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 resistance below 10k ohms on any of the circuits?
Yes
>> Repair all circuits with a resistance below 10k ohms for a
short to (C55) Left Blend Door Common 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 7
7.
CHECK THE (C252) RIGHT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C268)
RECIRCULATION DOOR DRIVER CIRCUIT & THE (C68) RECIRCULATION DOOR COMMON DRIVER
CIRCUIT
Measure the resistance between the (C252) Right Blend Door Driver
circuit and the (C268) Recirculation 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 (C252) Right Blend 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 8
24 - 168
HVAC - ELECTRICAL DIAGNOSTICS
LX
8.
CHECK THE (C52) RIGHT BLEND DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO THE (C268)
RECIRCULATION DOOR DRIVER CIRCUIT & THE (C68) RECIRCULATION DOOR COMMON DRIVER
CIRCUIT
Measure the resistance between the (C52) Right Blend Door Common
Driver circuit and the (C268) Recirculation 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 (C52) Right Blend Door Common 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 9
9.
CHECK THE MODE DOOR ACTUATOR CIRCUIT RESISTANCE
Measure the resistance between the (C266) Mode Door Driver circuit
and the (C66) Mode Door Common Driver circuit in the A/C Heater
Control C2 harness connector.
Is the resistance below 30.0 ohms?
Yes
>> Go To 10
No
>> Go To 11
LX
HVAC - ELECTRICAL DIAGNOSTICS
24 - 169
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