Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 2284

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

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HVAC - ELECTRICAL DIAGNOSTICS

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12.

CHECK THE (C255) LEFT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C55) LEFT BLEND
DOOR COMMON DRIVER CIRCUIT

Disconnect the Left Blend Door Actuator harness connector.

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 10k ohms?

Yes

>> Repair the (C255) Left Blend Door Driver circuit for a short

to the (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

>> Replace the Left Blend 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).

13.

CHECK THE RIGHT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE

Measure the resistance between the (C252) Right Blend Door Driver
circuit and the (C52) Right Blend Door Common Driver circuit in the
A/C Heater Control C2 harness connector.

Is the resistance below 30.0 ohms?

Yes

>> Go To 14

No

>> Go To 15

LX

HVAC - ELECTRICAL DIAGNOSTICS

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14.

CHECK THE (C252) RIGHT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C52) RIGHT
BLEND DOOR COMMON DRIVER CIRCUIT

Disconnect the Right Blend Door Actuator harness connector.

Measure the resistance between the (C252) Right Blend Door Driver
circuit and the (C52) Right Blend Door Common Driver circuit in the
A/C Heater Control C2 harness connector.

Is the resistance below 10k ohms?

Yes

>> Repair the (C252) Right Blend Door Driver circuit 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

>> Replace the Right Blend 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).

15.

CHECK THE RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE

Measure the resistance between the (C268) Recirculation Door Driver
circuit and the (C68) Recirculation Door Common Driver circuit in the
A/C Heater Control C2 harness connector.

Is the resistance below 30.0 ohms?

Yes

>> Go To 16

No

>> Go To 17

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HVAC - ELECTRICAL DIAGNOSTICS

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16.

CHECK THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C68)
RECIRCULATION DOOR COMMON DRIVER CIRCUIT

Disconnect the Recirculation Door Actuator harness connector.

Measure the resistance between the (C268) Recirculation Door Driver
circuit and the (C68) Recirculation Door Common Driver circuit in the
A/C Heater Control C2 harness connector.

Is the resistance below 10k ohms?

Yes

>> Repair the (C268) Recirculation Door Driver circuit for a

short to the (C68) Recirculation Door Common Driver cir-
cuit.

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

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING).

No

>> Replace the Recirculation 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).

17.

RUN THE ACTUATOR CALIBRATION TEST

Reconnect the A/C Heater Control C2 harness connector.

Reconnect the all of the Door Actuator harness connectors.

Turn the ignition on.

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 Calibration Test. When the test is complete, select
View DTCs.

Does the scan tool only display: B10A2–LEFT BLEND DOOR CONTROL CIRCUIT/PERFORMANCE?

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, Other DTC(s) Displayed

Diagnose and repair the other DTC(s). Refer to the Table of Contents in this Section for a complete list
of all HVAC related symptoms.

No, And No Other 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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING).

LX

HVAC - ELECTRICAL DIAGNOSTICS

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