Nissan Maxima. Manual - part 752
HAC-184
< SYMPTOM DIAGNOSIS >
[WITH MONOCHROME DISPLAY]
INSUFFICIENT COOLING
7.
CHECK WITH ACTIVE TEST OF CONSULT
1. Using CONSULT, perform “HVAC TEST”“ACTIVE TEST” of HVAC to check each output device. Refer to
NOTE:
Perform the ACTIVE TEST after starting the engine because the A/C compressor is operating.
2. Refer to the table and check the outlet, inlet, airflow temperature, blower motor control signal, magnet
clutch operation, and air mix ratio. Visually check each operating condition, by listening for noise, touching
air outlets with a hand, etc.
Does it operate normally?
YES
>> GO TO 8.
NO-1 >> Air outlet does not change. Refer to
HAC-153, "Diagnosis Procedure"
NO-2 >> Air inlet does not change. Refer to
HAC-156, "Diagnosis Procedure"
.
NO-3 >> Discharge air temperature does not change. Refer to
HAC-148, "Diagnosis Procedure"
.
NO-4 >> Blower motor does not operate normally. Refer to
HAC-157, "Diagnosis Procedure"
NO-5 >> Magnet clutch does not operate. Refer to
HAC-161, "Diagnosis Procedure"
.
8.
CHECK AIR MIX DOOR MOTOR OPERATION
Check and verify air mix door mechanism for smooth operation.
Does air mix door operate correctly?
YES
>> GO TO 9
NO
>> Repair or replace air mix door control linkage.
9.
CHECK COOLING FAN MOTOR OPERATION
Check and verify cooling fan motor for smooth operation.
Does cooling fan motor operate correctly?
YES
>> GO TO 10
NO
>> Check cooling fan motor. Refer to
EC-486, "Component Function Check"
.
10.
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
11.
CHECK REFRIGERANT PURITY
1. Connect recovery/recycling equipment to vehicle.
2. Confirm refrigerant purity in supply tank using recovery/recycling and refrigerant indentifier.
Is the inspection result normal?
YES
>> GO TO 12
NO
>> Check contaminated refrigerant. Refer to
12.
CHECK REFRIGERANT PRESSURE
Test item
MODE 1
MODE 2
MODE 3
MODE 4
MODE 5
MODE 6
Mode door position
VENT1
B/L1
B/L2
FOOT
D/F
DEF
Intake door position
REC
REC
20%FRE
FRE
FRE
FRE
Air mix door position
(driver & passenger
side)
FULL COLD
FULL COLD
FULL HOT
FULL HOT
FULL HOT
FULL HOT
Blower motor duty ratio
37%
91%
65%
65%
65%
91%
A/C compressor (Mag-
net clutch)
ON
ON
OFF
OFF
ON
ON