Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

Symptom

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

CAUTION: Perform the self-diagnoses with on board diagnosis and CONSULT before performing symptom diagnosis. If any malfunction result or DTC is detected, perform the corresponding diagnosis.

CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of the rear air conditioning system for air leakage.

Is the inspection result normal?

YES

GO TO 2.

NO

Repair or replace parts depending on the inspection results.
CHECK SETTING OF TEMPERATURE SETTING TRIMMER (REAR)
1. Check setting value of temperature setting trimmer (rear). Refer to Temperature Setting Trimmer (Rear) .
2. Check that the temperature setting trimmer is set to "- direction".
  NOTE: The control temperature can be set by the temperature setting trimmer (rear).
3. Set the difference between the set temperature (rear) and control temperature to "0".
Are the symptoms solved?

YES

Inspection End.

NO

Replace A/C auto amp. Refer to Removal and Installation .