Nissan Titan. Instruction — part 415
MANUAL A/C IDENTIFICATION TABLE
HAC-165
< SYMPTOM DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
SYMPTOM DIAGNOSIS
MANUAL A/C IDENTIFICATION TABLE
Application Table
INFOID:0000000009882549
Instruction A/C Type
Description
Visual Identification
Instruction A/C (Type 1)
Two Control Dial System
Instruction A/C (Type 2)
Three Control Dial System
[with variable blower control
(VBC)]
ALIIA0692ZZ
AWIIA0478ZZ
HAC-166
< SYMPTOM DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
AIR CONDITIONER CONTROL
AIR CONDITIONER CONTROL
Symptom Matrix Chart
INFOID:0000000009882550
SYMPTOM TABLE
Symptom
Reference Page
A/C system does not come on.
Go to Trouble Diagnosis Procedure for A/C System.
A/C system cannot be controlled.
Go to Self-diagnosis Function.
Air outlet does not change.
Go to Trouble Diagnosis Procedure for Mode Door Motor.
Mode door motor is malfunctioning.
Discharge air temperature does not change.
Go to Trouble Diagnosis Procedure for Air Mix Door Motor.
Air mix door motor is malfunctioning.
Intake door does not change.
Go to Trouble Diagnosis Procedure for Intake Door Motor.
Intake door motor is malfunctioning.
Defroster door motor is malfunctioning.
Go to Trouble Diagnosis Procedure for Defroster Door Motor.
Front blower motor operation is malfunction-
ing.
Go to Trouble Diagnosis Procedure for Front Blower Motor.
Magnet clutch does not engage.
Go to Trouble Diagnosis Procedure for Magnet Clutch.
Insufficient cooling
Go to Trouble Diagnosis Procedure for Insufficient Cooling.
Insufficient heating
Go to Trouble Diagnosis Procedure for Insufficient Heating.
Noise
Go to Trouble Diagnosis Procedure for Noise.
Self-diagnosis cannot be performed.
Go to Trouble Diagnosis Procedure for Self-diagnosis.
INSUFFICIENT COOLING
HAC-167
< SYMPTOM DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
INSUFFICIENT COOLING
Component Function Check
INFOID:0000000009882551
SYMPTOM: Insufficient cooling
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Rotate the blower control dial to the low speed.
2. Turn temperature control dial counterclockwise to maximum cold.
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-166, "Symptom Matrix Chart"
NO
>> System OK.
3.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> If equipped with NAVI, GO TO 4.
>> If not equipped with NAVI, GO TO 5.
4.
PERFORM SELF-DIAGNOSIS
Perform self-diagnosis Refer to
HAC-114, "Front Air Control Self-Diagnosis"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Refer to
HAC-166, "Symptom Matrix 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-14, "Removal and Installation"
6.
CHECK AIR MIX DOOR OPERATION
Check and verify air mix door mechanism for smooth operation. Refer to
HAC-120, "Air Mix Door Motor Com-
.
Does air mix door operate correctly?
YES
>> GO TO 7.
NO
>> Check air mix door motor circuit. Refer to
HAC-121, "Air Mix Door Motor Diagnosis Procedure"
.
7.
CHECK COOLING FAN MOTOR OPERATION
Check and verify cooling fan motor for smooth operation. Refer to
EC-378, "Overall Function Check"
.
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-168
< SYMPTOM DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
INSUFFICIENT COOLING
NO
>> Check water valve circuit. Refer to
HAC-142, "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-178, "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-168, "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-168, "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:0000000009882552
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