Jeep Grand Cherokee WK. Manual — part 1731
B109D–PANEL MODE DOOR 2 CONTROL CIRCUIT HIGH (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 (C139) Rear Mode Door Driver circuit or the (C939) Rear Mode Door Common Driver circuit is shorted
to voltage.
Possible Causes
(C139) REAR MODE DOOR DRIVER CIRCUIT SHORTED TO VOLTAGE
(C939) REAR MODE DOOR COMMON DRIVER CIRCUIT SHORTED TO VOLTAGE
A/C HEATER CONTROL
Diagnostic Test
1.
CHECK THE (C139) REAR MODE DOOR DRIVER CIRCUIT & THE (C939) REAR MODE DOOR COMMON
DRIVER CIRCUIT FOR A SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the A/C Heater Control C2 harness connector.
Turn the ignition on.
Measure the voltage of the (C139) Rear Mode Door Driver circuit.
Measure the voltage of the (C939) Rear Mode Door Common Driver
circuit.
Is the voltage above 0.2 volts on either circuit?
Yes
>> Repair the circuit(s) with voltage above 0.2 volts a short to
voltage.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE).
No
>> Go To 2
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HVAC - ELECTRICAL DIAGNOSTICS
WK
B109D–PANEL MODE DOOR 2 CONTROL CIRCUIT HIGH (ATC) (CONTINUED)
2.
RUN THE ACTUATOR DTC DETECTION TEST
Turn the ignition off.
Reconnect the A/C Heater Control C2 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: B109D–PANEL MODE DOOR 2 CONTROL CIRCUIT HIGH?
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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HVAC - ELECTRICAL DIAGNOSTICS
24 - 273
B109E–PANEL MODE DOOR 2 CONTROL CIRCUIT OPEN (ATC)
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HVAC - ELECTRICAL DIAGNOSTICS
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B109E–PANEL MODE DOOR 2 CONTROL CIRCUIT OPEN (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:
With the ignition on.
•
Set Condition:
If the (C139) Rear Mode Door Driver circuit or the (C939) Rear Mode Door Common Driver circuit is open.
Possible Causes
(C139) REAR MODE DOOR DRIVER CIRCUIT OPEN
(C939) REAR MODE DOOR COMMON DRIVER CIRCUIT OPEN
REAR MODE DOOR ACTUATOR
A/C HEATER CONTROL
Diagnostic Test
1.
CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE DTCs
Turn the ignition on.
With the scan tool, read active HVAC DTCs.
Does the scan tool display any active: XXXX CONTROL CIRCUIT/PERFORMANCE DTCs?
Yes
>> Diagnose and repair the DTC(s). Refer to the Table of Contents in this Section for a complete list of all
HVAC related symptoms.
No
>> Go To 2
2.
CHECK THE REAR MODE DOOR ACTUATOR CIRCUIT RESISTANCE
Turn the ignition off.
Disconnect the A/C Heater Control C2 harness connector.
Measure the resistance between the (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 above 70.0 ohms?
Yes
>> Go To 3
No
>> 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).
WK
HVAC - ELECTRICAL DIAGNOSTICS
24 - 275
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