Jeep Grand Cherokee WK. Manual — part 1737
B1041–PANEL MODE DOOR 1 CONTROL CIRCUIT LOW (ATC) (CONTINUED)
For the Automatic Temperature Control (ATC) circuit diagram (Refer to 24 - HEATING & AIR CONDITIONING -
SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
When the Actuator DTC Detection Test is executed.
•
Set Condition:
If the (C266) Front Mode Door Driver circuit or the (C66) Front Mode Door Common Driver circuit is shorted
to ground.
Possible Causes
(C266) FRONT MODE DOOR DRIVER CIRCUIT SHORTED TO GROUND
(C66) FRONT MODE DOOR COMMON DRIVER CIRCUIT SHORTED TO GROUND
(C266) FRONT MODE DOOR DRIVER CIRCUIT SHORTED TO (C66) FRONT MODE DOOR COMMON DRIVER
CIRCUIT
(C266) FRONT MODE DOOR DRIVER CIRCUIT SHORTED TO OTHER DOOR DRIVER CIRCUIT(S)
(C66) FRONT MODE DOOR COMMON DRIVER CIRCUIT SHORTED TO OTHER DOOR DRIVER CIRCUIT(S)
FRONT MODE DOOR ACTUATOR
A/C HEATER CONTROL
Diagnostic Test
1.
CHECK THE (C266) FRONT MODE DOOR DRIVER CIRCUIT & THE (C66) FRONT MODE DOOR COMMON
DRIVER CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the A/C Heater Control C2 harness connector.
Measure the resistance of the (C266) Front Mode Door Driver circuit
between ground and the A/C Heater Control C2 harness connector.
Measure the resistance of the (C66) Front Mode Door Common Driver
circuit between ground and the A/C Heater Control C2 harness con-
nector.
Is the resistance below 10k ohms on either circuit?
Yes
>> Repair the circuit(s) with a resistance below 10k ohms for
a short to ground.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Go To 2
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B1041–PANEL MODE DOOR 1 CONTROL CIRCUIT LOW (ATC) (CONTINUED)
2.
CHECK THE FRONT MODE DOOR ACTUATOR CIRCUIT RESISTANCE
Measure the resistance between the (C266) Front Mode Door Driver
circuit and the (C66) Front Mode Door Common Driver circuit in the
A/C Heater Control C2 harness connector.
Is the resistance below 30.0 ohms?
Yes
>> Go To 3
No
>> Go To 4
3.
CHECK THE (C266) FRONT MODE DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C66) FRONT MODE
DOOR COMMON DRIVER CIRCUIT
Disconnect the Front Mode Door Actuator harness connector.
Measure the resistance between the (C266) Front Mode Door Driver
circuit and the (C66) Front Mode Door Common Driver circuit in the
A/C Heater Control C2 harness connector.
Is the resistance below 10k ohms?
Yes
>> Repair the (C266) Front Mode Door Driver circuit for a
short to the (C66) Front Mode Door Common Driver cir-
cuit.
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).
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HVAC - ELECTRICAL DIAGNOSTICS
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B1041–PANEL MODE DOOR 1 CONTROL CIRCUIT LOW (ATC) (CONTINUED)
4.
CHECK THE (C266) FRONT MODE DOOR DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER
CIRCUITS
Measure the resistance between the (C266) Front Mode Door Driver
circuit and the (C268) Recirculation Door Driver circuit, (C68) Recircu-
lation Door Common Driver circuit, (C255) Left Blend Door Driver cir-
cuit, (C55) Left Blend Door Common Driver circuit, (C61) Right Blend
Door Driver circuit, (C161) Right Blend Door Common Driver circuit,
(C139) Rear Mode Door Driver circuit, and the (C939) Rear Mode
Door Common Driver circuit in the A/C Heater Control C2 harness
connector.
Is the resistance below 10k ohms between the (C266) Front
Mode Door Driver circuit and any of the other door driver cir-
cuits?
Yes
>> Repair the circuit(s) with a resistance below 10k ohms 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
>> Go To 5
5.
CHECK THE (C66) FRONT MODE DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR
DRIVER CIRCUITS
Measure the resistance between the (C66) Front Mode Door Common
Driver circuit and the (C268) Recirculation Door Driver circuit, (C68)
Recirculation Door Common Driver circuit, (C255) Left Blend Door
Driver circuit, (C55) Left Blend Door Common Driver circuit, (C61)
Right Blend Door Driver circuit, (C161) Right Blend Door Common
Driver circuit, (C139) Rear Mode Door Driver circuit, and the (C939)
Rear Mode Door Common Driver circuit in the A/C Heater Control C2
harness connector.
Is the resistance below 10k ohms between the (C66) Front
Mode Door Common Driver circuit and any of the other door
driver circuits?
Yes
>> Repair the circuit(s) with a resistance below 10k ohms for
a short to the (C66) Front Mode Door Common Driver cir-
cuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Go To 6
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B1041–PANEL MODE DOOR 1 CONTROL CIRCUIT LOW (ATC) (CONTINUED)
6.
RUN THE ACTUATOR DTC DETECTION TEST
Reconnect the A/C Heater Control C2 harness connector.
Reconnect the Front Mode Door Actuator harness connector.
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 DTC Detection. When the test is complete, select
View DTCs.
Does the scan tool only display: B1041–PANEL MODE DOOR 1 CONTROL CIRCUIT LOW?
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 - STANDARD PROCEDURE).
No, Other DTC(s) Displayed
Diagnose and repair the other DTC(s). If multiple DTCs are present, diagnose and repair all short high
DTCs before diagnosing short low DTCs. 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 - STANDARD PROCEDURE).
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