Nissan Titan A60. Instruction — part 600
INSUFFICIENT COOLING
HAC-83
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
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INSUFFICIENT COOLING
Component Function Check
INFOID:0000000006164725
SYMPTOM: Insufficient cooling
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Press the AUTO switch.
2. Turn temperature control dial (driver) counterclockwise until 18
°C (60°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.
2.
CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to
Does another symptom exist?
YES
>> Refer to
HAC-82, "Symptom Matrix Chart"
.
NO
>> System OK.
3.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.
PERFORM SELF-DIAGNOSIS
Perform self-diagnosis Refer to
HAC-21, "Front Air Control Self-Diagnosis"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Refer to
HAC-21, "Front Air Control Self-Diagnosis Code Chart"
5.
CHECK DRIVE BELTS
Check compressor belt tension. Refer to
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Adjust or replace compressor belt. Refer to
EM-13, "Removal and Installation"
6.
CHECK AIR MIX DOOR OPERATION
Check and verify air mix door mechanism for smooth operation. Refer to
HAC-28, "Air Mix Door Motor (Driver)
.
Does air mix door operate correctly?
YES
>> GO TO 7.
NO
>> Check air mix door motor circuit. Refer to
HAC-28, "Air Mix Door Motor (Driver) Diagnosis Proce-
or
HAC-32, "Air Mix Door Motor (Passenger) Diagnosis Procedure"
.
7.
CHECK COOLING FAN MOTOR OPERATION
Check and verify cooling fan motor for smooth operation. Refer to
EC-439, "Component Inspection"
.
Does cooling fan motor operate correctly?
YES
>> GO TO 8.
NO
>> Check cooling fan motor. Refer to
.
8.
CHECK WATER VALVE OPERATION
Check and verify water valve for smooth operation. Refer to
.
Does water valve operate correctly?
YES
>> GO TO 9.
HAC-84
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
INSUFFICIENT COOLING
NO
>> Check water valve circuit. Refer to
HAC-54, "Water Valve Diagnosis Procedure"
.
9.
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 10.
10.
CHECK REFRIGERANT PURITY
1. Connect recovery/recycling equipment to vehicle.
2. Confirm refrigerant purity in supply tank using recovery/recycling and refrigerant identifier.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Check contaminated refrigerant. Refer to
HAC-95, "Working with HFC-134a (R-134a)"
.
11.
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
HAC-84, "Diagnostic Work Flow"
.
NO
>> GO TO 12.
12.
CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. Refer to
.
Is the inspection result normal?
YES
>> Perform performance test diagnoses. Refer to
HAC-84, "Diagnostic Work Flow"
.
NO
>> GO TO 13.
13.
CHECK AIR DUCTS
Check ducts for air leaks.
Is the inspection result normal?
YES
>> System OK.
NO
>> Repair air leaks.
Diagnostic Work Flow
INFOID:0000000006164726
INSUFFICIENT COOLING
HAC-85
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
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HAC
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*1
HA-24, "Checking System for Leaks
Using the Fluorescent Dye Leak De-
tector"
*2
HA-33, "Removal and Installation for
Compressor Clutch"
*3
*4
HAC-87, "Trouble Diagnoses for Ab-
normal Pressure"
*5
HAC-28, "Air Mix Door Motor (Driver)
Component Function Check"
AWIIA0999GB
HAC-86
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
INSUFFICIENT COOLING
Performance Chart
INFOID:0000000006164727
TEST CONDITION
Testing must be performed as follows:
*1
HA-33, "Removal and Installation for
Compressor Clutch"
*2
HAC-44, "Front Blower Motor Com-
ponent Function Check"
*3
HA-33, "Removal and Installation for
Compressor Clutch"
*4
*5
HA-32, "Removal and Installation for
Compressor"
AWIIA1000GB
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