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Nissan Armada 2025-2026 Service and Repair Manual: Front Automatic Air Conditioning System

Nissan Armada 2025-2026 Service and Repair Manual / Ventilation, Heater & Air Conditioner / Heater & Air Conditioning Control System / Front Automatic Air Conditioning System

Symptom Table

NOTE:

Perform self-diagnoses with CONSULT before performing the symptom diagnosis. If any DTC is detected, perform the corresponding diagnosis.

Symptom Corresponding malfunction part Check item/Reference

Front air conditioning system does not activate.

NOTE:

Fail-safe does not activate.

  • Fuse

  • A/C auto amp. power supply or ground circuit

  • A/C auto amp.

Check A/C auto amp. power supply and ground circuits.

Refer to Diagnosis Procedure.
Front air conditioning cannot be controlled. Display unit operation

Check AV system.

Refer to Work Flow.
All control

  • Fuse

  • Multifunction switch power supply or ground circuit

  • A/C auto amp.

Check multifunction switch power supply and ground circuits.

Refer to Diagnosis Procedure.
A part of control Multifunction switch

Replace multifunction switch.

Refer to Removal and Installation.
Discharge air temperature (driver side) does not change. Front air mix door motor (driver side) system installation condition

Check front air mix door motor (driver side) system properly installed.

Refer to Exploded View.
Discharge air temperature (passenger side) does not change. Front air mix door motor (passenger side) system installation condition

Check front air mix door motor (passenger side) system properly installed.

Refer to Exploded View.
Air outlet does not change. Front mode door motor system installation condition

Check front mode door motor system properly installed.

Refer to Exploded View.
Air inlet does not change. Intake door motor system installation condition

Check intake door motor system properly installed.

Refer to Exploded View.
Front blower motor does not operates or operation speed is not normal.

  • Fusible link

  • Front blower motor

  • Front blower motor power supply or ground circuit

  • Front blower motor control signal circuit

  • A/C auto amp.

Check front blower motor circuits.

Refer to Diagnosis Procedure.
Compressor does not operate.

  • Magnet clutch

  • Magnet clutch power supply or ground circuit

  • IPDM E/R (smart FET)

  • The circuit between ECM and refrigerant pressure sensor

  • Refrigerant pressure sensor

  • ECM

  • A/C auto amp.

 Refer to Diagnosis Procedure.

  • Insufficient cooling

  • No cool air comes out. (Air flow volume is normal.)

  • Magnet clutch control system

  • Drive belt slipping

  • Cooler cycle

  • ECV (Electrical control valve)

  • Air leakage from each duct

  • Sunload sensor

  • Temperature setting trimmer

 Refer to Diagnosis Procedure.

  • Insufficient heating

  • No warm air comes out. (Air flow volume is normal.)

  • Engine cooling system

  • Front heater hose

  • Front heater core

  • Air leakage from each duct

  • Sunload sensor

  • Temperature setting trimmer

 Refer to Diagnosis Procedure.
Noise is heard when the air conditioning operates. During compressor operation Cooler cycle

Symptom table for noise

Refer to Symptom Table.
During front blower motor operation

  • Mixing any foreign object in front blower motor

  • Front blower motor fan breakage

  • Front blower motor rotation inferiority

Check front blower motor.

Refer to Component Inspection (Front Blower Motor).
Biometric cooling control does not activate. IR sensor

Check IR sensor.

Refer to Diagnosis Procedure.
Login ID control does not operate. (Air conditioning function only) A/C auto amp.

Replace A/C auto amp.

Refer to Removal and Installation.
Automatic intake control (exhaust gas / outside odor detecting mechanism) does not operate

  • Fuse

  • Exhaust gas / outside odor detecting sensor power supply and ground circuit

  • Exhaust gas / outside odor detecting sensor

  • Exhaust gas / outside odor detecting sensor control signal circuit

  • A/C auto amp.

Check exhaust gas / outside odor detecting sensor power supply and ground circuit.

Refer to Diagnosis Procedure.
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