Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 2288

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

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HVAC - ELECTRICAL DIAGNOSTICS

LX

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

LX

HVAC - ELECTRICAL DIAGNOSTICS

24 - 187

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

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HVAC - ELECTRICAL DIAGNOSTICS

LX

10.

CHECK THE (C266) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C66) MODE DOOR
COMMON DRIVER CIRCUIT

Disconnect the Mode Door Actuator harness connector.

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 10k ohms?

Yes

>> Repair the (C266) Mode Door Driver circuit 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

>> Replace the Mode Door Actuator in accordance with the

Service Information.

Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).

11.

CHECK THE LEFT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE

Measure the resistance between the (C255) Left Blend Door Driver cir-
cuit and the (C55) Left Blend Door Common Driver circuit in the A/C
Heater Control C2 harness connector.

Is the resistance below 30.0 ohms?

Yes

>> Go To 12

No

>> Go To 13

LX

HVAC - ELECTRICAL DIAGNOSTICS

24 - 189