Jeep Grand Cherokee WK. Manual — part 1696
61–COMMON DOOR DRIVER CIRCUIT SHORTED TO GROUND (MTC) (CONTINUED)
3.
CHECK THE (C939) REAR MODE DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO THE (C266)
FRONT MODE DOOR DRIVER CIRCUIT, (C255) LEFT BLEND DOOR DRIVER CIRCUIT, (C55) LEFT BLEND
DOOR COMMON DRIVER CIRCUIT, (C268) RECIRCULATION DOOR DRIVER CIRCUIT, & THE (C68)
RECIRCULATION DOOR COMMON DRIVER CIRCUIT
Measure the resistance between the (C939) Rear Mode Door Com-
mon Driver circuit and the (C266) Front Mode Door Driver circuit,
(C255) Left Blend Door Driver circuit, (C55) Left Blend Door Common
Driver circuit, (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 (C939) Rear Mode Door Common Driver cir-
cuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Go To 4
4.
CHECK THE (C55) LEFT BLEND DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO THE (C266)
FRONT MODE DOOR DRIVER CIRCUIT, (C139) REAR MODE DOOR DRIVER CIRCUIT, (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 (C266) Front Mode Door Driver circuit, (C139)
Rear Mode Door Driver circuit, (C268) Recirculation Door Driver cir-
cuit, 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 5
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HVAC - ELECTRICAL DIAGNOSTICS
WK
61–COMMON DOOR DRIVER CIRCUIT SHORTED TO GROUND (MTC) (CONTINUED)
5.
CHECK THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO THE (C266)
FRONT MODE DOOR DRIVER CIRCUIT, (C139) REAR MODE DOOR DRIVER CIRCUIT, & THE (C255)
LEFT BLEND DOOR DRIVER CIRCUIT
Measure the resistance between the (C68) Recirculation Door Com-
mon Driver circuit and the (C266) Front Mode Door Driver circuit,
(C139) Rear Mode Door 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 on any of the circuits?
Yes
>> Repair all circuits with a resistance below 10k ohms 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 -
STANDARD PROCEDURE).
No
>> Go To 6
6.
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 7
No
>> Go To 8
WK
HVAC - ELECTRICAL DIAGNOSTICS
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61–COMMON DOOR DRIVER CIRCUIT SHORTED TO GROUND (MTC) (CONTINUED)
7.
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).
8.
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 9
No
>> Go To 10
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HVAC - ELECTRICAL DIAGNOSTICS
WK
61–COMMON DOOR DRIVER CIRCUIT SHORTED TO GROUND (MTC) (CONTINUED)
9.
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).
10.
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 11
No
>> Go To 12
WK
HVAC - ELECTRICAL DIAGNOSTICS
24 - 135
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