Inspection Flow

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Press the AUTO switch.
2. Turn temperature control dial (driver) counterclockwise until 16°C (32°F) is displayed.
3. Check for cold air at discharge air outlets.
Can the symptom be duplicated?

Yes: GO TO 3.

No: GO TO 2.
CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to "OPERATIONAL CHECK ".

Does another symptom exist?

YES: Refer to "SYMPTOM TABLE ".

NO: System OK.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.

: GO TO 4.
PERFORM FRONT AIR CONTROL SELF-DIAGNOSIS
Perform front air control self-diagnosis. Refer to "FRONT AIR CONTROL SELF - DIAGNOSIS ".

OK or NG

OK: GO TO 5.

NG: Perform power and ground circuit for front air control. Refer to "POWER SUPPLY AND GROUND CIRCUIT FOR FRONT AIR CONTROL AND UNIFIED METER AND A/C AMP .".
PERFORM SELF-DIAGNOSIS STEP - 2
Perform self-diagnosis STEP - 2. Refer to "FUNCTION CONFIRMATION PROCEDURE ".

OK or NG

OK: GO TO 6.

NG: Perform appropriate malfunctioning sensor circuit.
PERFORM SELF-DIAGNOSIS STEP - 4
Perform self-diagnosis STEP - 4. Refer to "FUNCTION CONFIRMATION PROCEDURE ".

OK and NG

OK: GO TO 7.

NG:
- Check Magnet clutch mechanism. Refer to "MAGNET CLUTCH CIRCUIT ".
- Check LAN system circuit. Refer to "LAN SYSTEM CIRCUIT ".
- Check blower motor circuit. Refer to "BLOWER MOTOR CIRCUIT ".
CHECK COMPRESSOR DRIVE BELT TENSION
Check compressor belt tension. Refer to "CHECKING DRIVE BELTS ".

OK or NG

OK: GO TO 8.

NG: Adjust or replace compressor belt. Refer to "GENERATOR AND AIR CONDITIONER COMPRESSOR BELT ".
CHECK AIR MIX DOOR OPERATION
Check and verify air mix door operation. Refer to "AIR MIX DOOR MOTOR CIRCUIT ".

Does air mix door operate correctly?

Yes: GO TO 9.

NO: Repair or replace air mix door control linkage.
CHECK COOLING FAN MOTOR OPERATION
Check and verify cooling fan motor for smooth operation. Refer to "DESCRIPTION ".

Does cooling fan motor operate correctly?

Yes: GO TO 10.

NO: Check cooling fan motor. Refer to "DTC P1217 ENGINE OVER TEMPERATURE ".
CHECK RECOVERY/RECYCLING EQUIPMENT BEFORE USAGE
Check recovery/recycling equipment before connecting to vehicle. Verify there is no pressure in the recovery/recycling equipment by checking the gauges. If pressure exists, recover refrigerant from equipment lines.

: GO TO 11.
CHECK REFRIGERANT PURITY
1. Connect recovery/recycling equipment to vehicle.
2. Confirm refrigerant purity in supply tank using recovery/recycling and refrigerant identifier.
OK or NG

OK: GO TO 12.

NG: Check contaminated refrigerant. Refer to "CONTAMINATED REFRIGERANT ".
CONNECT ACR2005 TO VEHICLE
Confirm refrigerant purity in vehicle A/C system using ACR2005 and refrigerant identifier.

OK or NG

OK: GO TO 13.

NG: Check contaminated refrigerant. Refer to "CONTAMINATED REFRIGERANT ".
CHECK FOR EVAPORATOR FREEZE UP
Start engine and run A/C. Check for evaporator freeze up.

Does evaporator freeze up?

YES: Perform performance test diagnoses. Refer to "PERFORMANCE TEST DIAGNOSES ".

No: GO TO 14.
CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. Refer to "TEST READING ".

OK or NG

OK: GO TO 15.

NG: Perform performance test diagnoses. Refer to "PERFORMANCE TEST DIAGNOSES ".
CHECK AIR DUCTS
Check ducts for air leaks.

OK or NG

OK: Perform temperature setting trimmer procedure. Refer to "AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER ".

NG: Repair air leaks.