Nissan Frontier D40. Manual — part 739
INSUFFICIENT COOLING
HAC-59
< SYMPTOM DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
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INSUFFICIENT COOLING
Component Function Check
INFOID:0000000005275902
SYMPTOM: Insufficient cooling
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1.
Turn temperature control dial counterclockwise to maximum cold.
2.
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-58, "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-17, "Front Air Control Self-Diagnosis"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Check symptom chart. Refer to
HAC-58, "Symptom Matrix Chart"
5.
CHECK DRIVE BELTS
Check compressor belt tension. Refer to
(VQ40DE).
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Adjust or replace compressor belt. Refer to
(QR25DE) or
6.
CHECK AIR MIX DOOR OPERATION
Check and verify air mix door mechanism for smooth operation.
Does air mix door operate correctly?
YES
>> GO TO 7.
NO
>> Repair or replace air mix door control linkage.
7.
CHECK COOLING FAN MOTOR OPERATION
Check and verify cooling fan motor for smooth operation. Refer to
EC-855, "Component Inspection"
.
Does cooling fan motor operate correctly?
YES
>> GO TO 8.
NO
>> Check cooling fan motor. Refer to
(QR25DE) or
8.
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.
HAC-60
< SYMPTOM DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
INSUFFICIENT COOLING
>> GO TO 9.
9.
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 10.
NO
>> Check contaminated refrigerant. Refer to
HA-4, "Contaminated Refrigerant"
.
10.
CHECK FOR EVAPORATOR FREEZE UP
Start engine and run A/C. Check for evaporator freeze up.
Does evaporator freeze up?
YES
>> Perform diagnostic work flow. Refer to
HAC-60, "Diagnostic Work Flow"
.
NO
>> GO TO 11.
11.
CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. Refer to
.
Is the inspection result normal?
YES
>> Perform diagnostic work flow. Refer to
HAC-60, "Diagnostic Work Flow"
.
NO
>> GO TO 12.
12.
CHECK AIR DUCTS
Check ducts for air leaks.
Is the inspection result normal?
YES
>> System OK.
NO
>> Repair air leaks.
Diagnostic Work Flow
INFOID:0000000005275903
INSUFFICIENT COOLING
HAC-61
< SYMPTOM DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
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*1
HA-20, "Checking System for Leaks
Using the Fluorescent Dye Leak De-
tector"
*2
HA-28, "Removal and Installation for
Compressor"
*3
*4
HAC-63, "Trouble Diagnoses for Ab-
normal Pressure"
*5
HAC-25, "Air Mix Door Motor Diagno-
sis Procedure"
AWIIA0999GB
HAC-62
< SYMPTOM DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
INSUFFICIENT COOLING
Performance Chart
INFOID:0000000005275904
TEST CONDITION
Testing must be performed as follows:
*1
VTL-9, "Removal and Installation"
*2
HAC-33, "Front Blower Motor Diag-
nosis Procedure"
*3
HA-30, "Removal and Installation for
Compressor Clutch"
*4
*5
HA-28, "Removal and Installation for
Compressor"
AWIIA1000GB
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