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Discussion Starter #1
Looking for trouble shooting solutions please.
the air flow for the vents, the temp selctor, AC, and rear window features ALL quit. I lean towards the modual it'self. Looking in scrap yard to come up empty handed was another inddicator. the car has never had illumination for that cluster also.
Guidance anyone? Oh I work Night shifts if you happen to see my login times.
Thanks in Advance.
 

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2014 Jeep Grand Cherokee Overland V6
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Do you have ATC or MTC? ATC= Automatic Temp Control with a display. The Manual Temp Control doesn't.
I would look at replcing the temp control

The illumination is via replaceable (expensive) bulbs.
 

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Wrench:
Welcome to DDN. My '04 also had no backlighting for the manual HVAC panel. Turned out to be a harness connector on the back of the dash cluster that was not fully seated. I would check the connectors on the back of your panel, and if they are ok, move onto the cluster.

Don
 

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2014 Jeep Grand Cherokee Overland V6
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The A/C-heater control utilizes integrated circuitry and information carried on the controller area network (CAN) B
bus to monitor many sensors and switch inputs throughout the vehicle. In response to those inputs, the internal
circuitry and programming of the A/C-heater control allows it to control electronic functions and features of the ATC
heating-A/C system.
The inputs received by the A/C-heater control of the ATC heating-A/C system on the CAN B bus are as follows:
² Dimming
² Refrigerant Pressure
² Vehicle Identification Number
² Vehicle Odometer
² Engine Coolant Temperature
² Ambient Air Temperature
² Infrared Temperature Sensor
² Ignition Voltage
² Vehicle Speed
The messages broadcasted by the A/C-heater control of the ATC heating-A/C system on the CAN B bus are as
follows:
² A/C Request
² A/C Select
² Rear Window Defogger (EBL) Request
² Rear Washer Request
² Rear Wiper Request

Looks like everything you described as not working originates within the ATC module.
 

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2014 Jeep Grand Cherokee Overland V6
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I have both the ATC and MTC versions available. Here's the pictures. Send me a message if interested.

111905


111906


111908
 
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Discussion Starter #6
Looking for trouble shooting solutions please.
the air flow for the vents, the temp selctor, AC, and rear window features ALL quit. I lean towards the modual it'self. Looking in scrap yard to come up empty handed was another inddicator. the car has never had illumination for that cluster also.
Guidance anyone? Oh I work Night shifts if you happen to see my login times.
Thanks in Advance.
 

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Discussion Starter #7
Do you have ATC or MTC? ATC= Automatic Temp Control with a display. The Manual Temp Control doesn't.
I would look at replcing the temp control

The illumination is via replaceable (expensive) bulbs.
I have the Manual Version, Thanks. I did replace it with a used one with no changes in function. Any other advice on what the next step is; before i send it to a shop ( who will probably have to do just what i am for advice).
Thank you
 

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2014 Jeep Grand Cherokee Overland V6
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You need to get it scanned for trouble codes now. Possible "U" or "B" codes present.

Checked fuses in the Junction block? Under the plastic cover by your left foot. #13 and #24...15a and 10a.
 

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Fuses above were for the ATC.

For the MTC it's fuses 7 and 24 in the Junction Block. 40A and 10A
 
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