Jeep Grand Cherokee WK. Manual — part 1675
41–FRONT MODE OVERCURRENT (MTC) (CONTINUED)
6.
CHECK THE (C255) LEFT 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 (C255) Left Blend Door Driver cir-
cuit and 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 on any of the circuits?
Yes
>> Repair all circuits with a resistance below 10k ohms for a
short to the (C255) Left Blend Door Driver circuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Go To 7
7.
CHECK THE (C55) LEFT 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 (C55) Left Blend Door Common
Driver circuit and 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 on any of the circuits?
Yes
>> Repair all circuits with a resistance below 10k ohms 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 -
STANDARD PROCEDURE).
No
>> Go To 8
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HVAC - ELECTRICAL DIAGNOSTICS
WK
41–FRONT MODE OVERCURRENT (MTC) (CONTINUED)
8.
CHECK THE FRONT MODE DOOR ACTUATOR CIRCUIT RESISTANCE
Measure the resistance between the (C66) Front Mode Door Common
Driver Circuit and the (C266) Front Mode Door Driver circuit in the A/C
Heater Control C2 harness connector.
Is the resistance below 30.0 ohms?
Yes
>> Go To 9
No
>> Go To 10
9.
CHECK THE (C66) FRONT MODE DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO THE (C266)
FRONT MODE DOOR DRIVER CIRCUIT
Disconnect the Front Mode Door Actuator harness connector.
Measure the resistance between the (C66) Front Mode Door Common
Driver Circuit and the (C266) Front Mode Door Driver circuit in the A/C
Heater Control C2 harness connector.
Is the resistance below 10k ohms?
Yes
>> Repair the (C66) Front Mode Door Common Driver Circuit
for a short to the (C266) Front Mode Door Driver circuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Replace the Front Mode Door Actuator in accordance with
the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
WK
HVAC - ELECTRICAL DIAGNOSTICS
24 - 49
41–FRONT MODE OVERCURRENT (MTC) (CONTINUED)
10.
CHECK THE REAR MODE DOOR ACTUATOR CIRCUIT RESISTANCE
Measure the resistance between the (C939) Rear Mode Door Com-
mon Driver Circuit and the (C139) Rear Mode Door Driver circuit in the
A/C Heater Control C2 harness connector.
Is the resistance below 30.0 ohms?
Yes
>> Go To 11
No
>> Go To 12
11.
CHECK THE (C939) REAR MODE DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO THE (C139)
REAR MODE DOOR DRIVER CIRCUIT
Disconnect the Rear Mode Door Actuator harness connector.
Measure the resistance between the (C939) Rear Mode Door Com-
mon Driver Circuit and the (C139) Rear Mode Door Driver circuit in the
A/C Heater Control C2 harness connector.
Is the resistance below 10k ohms?
Yes
>> Repair the (C939) Rear Mode Door Common Driver Circuit
for a short to the (C139) Rear Mode Door Driver circuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Replace the Rear Mode Door Actuator in accordance with
the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
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HVAC - ELECTRICAL DIAGNOSTICS
WK
41–FRONT MODE OVERCURRENT (MTC) (CONTINUED)
12.
CHECK THE LEFT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE
Measure the resistance between the (C55) Left Blend Door Common
Driver Circuit and the (C255) Left Blend Door Driver circuit in the A/C
Heater Control C2 harness connector.
Is the resistance below 30.0 ohms?
Yes
>> Go To 13
No
>> Go To 14
13.
CHECK THE (C55) LEFT BLEND DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO THE (C255)
LEFT BLEND DOOR DRIVER CIRCUIT
Disconnect the Left Blend Door Actuator harness connector.
Measure the resistance between the (C55) Left Blend Door Common
Driver Circuit and the (C255) Left Blend Door Driver circuit in the A/C
Heater Control C2 harness connector.
Is the resistance below 10k ohms?
Yes
>> Repair the (C55) Left Blend Door Common Driver Circuit
for a short to the (C255) Left Blend Door Driver circuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
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 -
STANDARD PROCEDURE).
WK
HVAC - ELECTRICAL DIAGNOSTICS
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