No AC/heat no power to AC/heat controls

KEITH_P

MEMBER
2010 NISSAN MURANO
4 CYL
2WD
AUTOMATIC
152,000 MILES

I have no A/C or heat. The buttons on the panel to control them don't work and when pressed there is no light showing they are on and off. The radio and GPS/navigation works just fine. I have replaced the blower motor, and the ac auto amp and still nothing. Ran the diagnostic test and the TX for HVAC was okay but the Rx for HVAC came back unknown. Replaced multiple fuses as well.

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Hi,

Are there any trouble codes that are present? For example, is U1000 or U1010 present? If not, then we need to move to a test. Here are the directions. Starting at number 3, it focuses on the HVAC RX circuit continuity. I have a feeling this will lead you to the fault.

The attached pics correlate with the directions.

________________________________________

2010 Nissan-Datsun Truck Murano FWD V6-3.5L (VQ35DE)
Without 7 Inch Display
Vehicle Heating and Air Conditioning Testing and Inspection Component Tests and General Diagnostics Automatic Air Conditioner A/C Control Signal Circuit Without 7 Inch Display
WITHOUT 7 INCH DISPLAY
A/C CONTROL SIGNAL CIRCUIT

Diagnosis Procedure

1. CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1. Using CONSULT-III, perform "SELF-DIAGNOSIS RESULTS" of HVAC.
2. Check if any DTC No. Is displayed in the self-diagnosis results.

NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. See: A L L Diagnostic Trouble Codes ( DTC ) > U Code Charts > Without 7 Inch Display or See: A L L Diagnostic Trouble Codes ( DTC ) > U Code Charts > Without 7 Inch Display.
Is any DTC No. Displayed?
YES - Perform the diagnosis that is applicable to the sensor and actuator. See: A L L Diagnostic Trouble Codes ( DTC ) > Testing and Inspection.
NO - GO TO 2.
2. CHECK TX (A/C CONTROL to A/C AUTO AMP.) CIRCUIT CONTINUITY
1. Disconnect the A/C control and the A/C auto amp. Connector.
2. Check continuity between A/C control harness connector and A/C auto amp. Harness connector.

Pic 1

3. Check continuity between A/C control harness connector and ground.

Pic 2

Is the inspection result normal?
YES - GO TO 3.
NO - Repair harness or connector.
3. CHECK RX (A/C AUTO AMP. To A/C CONTROL) CIRCUIT CONTINUITY
1. Disconnect the A/C control and the A/C auto amp. Connector.
2. Check continuity between A/C control harness connector and A/C auto amp. Harness connector.

Pic 3

3. Check continuity between A/C control harness connector and ground.

Pic 4

Is the inspection result normal?
YES - Perform trouble diagnosis for the A/C control. See: Heating and Air Conditioning > Component Tests and General Diagnostics > A/C Control.
NO - Repair harness or connector.

_________________

Let me know what you find.

Joe

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Wednesday, October 28th, 2020 AT 8:15 PM

KEITH_P

MEMBER
2 POSTS

I pull up the diagnostic on the in dash screen and it won't let me select the HVAC option. It's there, however, I click on it nothing happens. I did run the CAN system test and got this. See pic below.
Possible relay? The panel itself? I read it could be the IPDM. Really at a stand still and the cold weather is coming in.

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Saturday, October 31st, 2020 AT 8:04 PM

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Hi,

Based on what I'm seeing, it sounds like a wiring issue. If you look at the directions I attached above, go down to number 3. Is that something you feel comfortable doing?

Joe

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Saturday, October 31st, 2020 AT 9:25 PM