Nissan Maxima Service and Repair Manual: Symptom diagnosis

• Insufficient cooling

Component Function Check Symptom Insufficient cooling No cool air comes out. (Airflow volume is normal.) INSPECTION FLOW 1. CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - TEMPERATURE DECREASE Press the AUTO switch. Turn temperature control switch (driver side) counterclockwise until 18C (60F) is displayed. Check for cold air at discharge air outlets. 2. CHECK FOR ANY SYMPTOMS Perform a complete operational check and check for any symptoms 3. CHECK FOR SERVICE BULLETINS Check for any service bulletins. 4. CHECK DRIVE BELTS Check A/C compressor belt tension. 5.CHECK SETTING OF TEMPERATURE SETTING TRIMMER Using CONSULT, check the setting of "TEMP SET CORRECT" on "WORK SUPPORT" of HVAC.

• Insufficient heating

Component Function Check Symptom Insufficient heating No warm air comes out. (Airflow volume is normal.) INSPECTION FLOW 1. CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - TEMPERATURE INCREASE Press the AUTO switch. Turn temperature control switch (driver side) clockwise until 32C (90F) is displayed. Check for hot air at discharge air outlets. 2. CHECK FOR ANY SYMPTOMS Perform a complete operational check and check for any symptoms. 3. CHECK FOR SERVICE BULLETINS Check for any service bulletins. 4. CHECK ENGINE COOLING SYSEM Check for proper engine coolant level. Refer to CO-10, "System Inspection". Check hoses for leaks or kinks. Check radiator cap.

• Noise

Component Function Check Symptom Noise Noise is heard when the A/C system operates.

• Memory function does not operate

Component Function Check Symptom Memory function does not operate normally. The setting is not maintained. (It returns to the initial condition.) 1.CHECK OPERATION Set temperature control switch to 32C (90F). Press the OFF switch. Turn the ignition switch OFF. Turn the ignition switch ON. Press the AUTO switch. Check that the set temperature is maintained.