Symptom Table

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

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

Symptom		Corresponding malfunction part	Reference
Air conditioning does not activate. Air conditioning cannot be controlled. Operation status of air conditioning is not indicated on display.		A/C auto amp. ignition power supply circuit Front A/C control (A/C auto amp.)	Diagnosis Procedure
Air outlet does not change. Mode door motor does not operate normally.		Circuit between mode door motor and A/C auto amp. Mode door motor control linkage Mode door motor A/C auto amp.	Diagnosis Procedure
Discharge air temperature of driver side does not change. Air mix door motor LH does not operate normally.		Circuit between air mix door motor LH and A/C auto amp. Air mix door motor LH installation condition Air mix door motor LH A/C auto amp.	Diagnosis Procedure
Discharge air temperature of passenger side does not change. Air mix door motor RH does not operate normally.		Circuit between air mix door motor RH and A/C auto amp. Air mix door motor RH installation condition Air mix door motor RH A/C auto amp.	Diagnosis Procedure
Intake door does not change. Intake door motor does not operate normally.		Circuit between intake door motor and A/C auto amp. Intake door motor control linkage Intake door motor A/C auto amp.	Diagnosis Procedure
All door motors do not operate normally.		Each door motor power supply and ground circuit A/C auto amp.	Diagnosis Procedure
Blower motor operation is malfunctioning.		Power supply system of front blower motor Circuit between front blower motor and A/C auto amp. Front blower motor A/C auto amp.	Diagnosis Procedure
Compressor does not operate.		Circuit between magnet clutch and IPDM E/R Magnet clutch IPDM E/R (A/C relay) Circuit between ECM and refrigerant pressure sensor Refrigerant pressure sensor CAN communication circuit A/C auto amp.	Diagnosis Procedure
Insufficient cooling. No cool air comes out. (Air flow volume is normal.)		Magnet clutch control system Drive belt slipping Refrigerant cycle ECV (electrical control valve) Air leakage from each duct A/C auto amp. connection recognition signal circuit Temperature setting trimmer (front)	Diagnosis Procedure
Insufficient heating. No warm air comes out. (Air flow volume is normal.)		Engine cooling system Heater hose Heater core PTC heater (Cummins 5.0L) Air leakage from each duct Temperature setting trimmer (front)	Diagnosis Procedure
Noise is heard when front air conditioning system operates.	During compressor operation	Refrigerant cycle	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	Component Inspection (Front Blower Motor)
Memory function does not operate. Setting temperature is not memorized.		Battery power supply system of A/C auto amp. A/C auto amp.	Diagnosis Procedure