Nissan Titan. Manual — part 375
DIAGNOSIS AND REPAIR WORKFLOW
HAC-5
< BASIC INSPECTION >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
How to Perform Trouble Diagnosis For Quick And Accurate Repair
INFOID:0000000009882433
WORK FLOW
1.
LISTEN TO CUSTOMER COMPLAINT
Listen to customer complaint. Get detailed information about the conditions and environment when the symp-
tom occurs.
>> GO TO 2
2.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.
VERIFY THE SYMPTOM WITH OPERATIONAL CHECK
Verify the symptom with operational check. Refer to
.
Can a symptom be duplicated?
YES
>> GO TO 4
NO
>> GO TO 5
4.
GO TO APPROPRIATE TROUBLE DIAGNOSIS
Go to appropriate trouble diagnosis. Refer to
HAC-82, "Symptom Matrix Chart"
.
Can a symptom be duplicated?
>> GO TO 5.
5.
PERFORM THE FRONT AIR CONTROL SELF-DIAGNOSIS
Perform front air control self-diagnosis. Refer to
HAC-21, "Front Air Control Self-Diagnosis"
>> If any diagnostic trouble codes set. Refer to
HAC-21, "Front Air Control Self-Diagnosis Code
.
>> Confirm the repair by performing operational check. Refer to
.
HAC-6
< BASIC INSPECTION >
[AUTOMATIC AIR CONDITIONER]
INSPECTION AND ADJUSTMENT
INSPECTION AND ADJUSTMENT
Operational Check
INFOID:0000000009882434
The purpose of the operational check is to confirm that the system operates properly.
CHECKING MEMORY FUNCTION
1. Set the temperature to 32
° (90°F).
2. Press the OFF switch.
3. Turn ignition switch OFF.
4. Turn ignition switch ON.
5. Press the AUTO switch.
6. Confirm that the set temperature remains at previous temperature.
7. Press the OFF switch.
If NG, go to trouble diagnosis procedure for
HAC-94, "Memory Function Check"
If OK, continue with next check.
CHECKING BLOWER
1. Rotate the blower control dial clockwise once, blower should operate on low speed.
2. Rotate the blower control dial again, and continue checking blower speed until all speeds are checked.
3. Leave blower on maximum speed.
If NG, go to trouble diagnosis procedure for
HAC-44, "Front Blower Motor Diagnosis Procedure"
.
If OK, continue with next check.
CHECKING DISCHARGE AIR
1. Press each MODE switch and the DEF
switch.
2. Each MODE position indicator should illuminate.
3. Confirm that discharge air comes out according to the air distribution table. Refer to
.
Mode door position is checked in the next step.
If NG, go to trouble diagnosis procedure for
HAC-23, "Mode Door Motor Diagnosis Procedure"
If OK, continue the check.
NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at
fresh when the DEF or D/F is selected.
CHECKING RECIRCULATION ( , ONLY)
1. Press recirculation (
) switch one time. Recirculation indicator should illuminate.
2. Press recirculation (
) switch one more time. Recirculation indicator should go off.
3. Listen for intake door position change (blower sound should change slightly).
If NG, go to trouble diagnosis procedure for
HAC-36, "Intake Door Motor Diagnosis Procedure"
.
If OK, continue the check.
NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at fresh
when the DEF or D/F is selected. REC (
) is not allowed in DEF (
) D/F (
) or FOOT (
).
CHECKING TEMPERATURE DECREASE
1. Rotate temperature control dial (drive or passenger) counterclockwise until 18
°C (60°F) is displayed.
2. Check for cold air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation. If OK, go to trouble diagnosis procedure for
. If air mix door motor appears to be malfunctioning, go to
Motor (Driver) Component Function Check"
Conditions
: Engine running and at normal operating temperature
INSPECTION AND ADJUSTMENT
HAC-7
< BASIC INSPECTION >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
If OK, continue the check.
CHECKING TEMPERATURE INCREASE
1. Rotate temperature control dial clockwise (drive or passenger) until 32
°C (90°F) is displayed.
2. Check for hot air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation. If OK, go to trouble diagnosis procedure for
. If air mix door motor appears to be malfunctioning, go to
Motor (Driver) Component Function Check"
If OK, continue with next check.
CHECK A/C SWITCH
1. Press A/C switch when AUTO switch is ON, or in manual mode.
2. A/C switch indicator will turn ON.
• Confirm that the compressor clutch engages (sound or visual inspection).
NOTE:
If current mode setting is DEF or D/F, compressor clutch will already be engaged and cannot be turned off.
If NG, go to trouble diagnosis procedure for
HAC-49, "Magnet Clutch Diagnosis Procedure"
If OK, continue with next check.
CHECKING AUTO MODE
1. Press AUTO switch.
2. AUTO indicator should illuminate.
• If ambient temperature is warm, and selected temperature is cool, confirm that the compressor clutch
engages (sound or visual inspection). (Discharge air and blower speed will depend on ambient, in-vehi-
cle, and set temperatures.)
If NG, go to trouble diagnosis procedure for
HAC-67, "Front Air Control Power and Ground Diagnosis
, then if necessary, trouble diagnosis procedure for
HAC-49, "Magnet Clutch Diagnosis Pro-
.
If all operational checks are OK (symptom cannot be duplicated), go to malfunction Simulation Tests in
HAC-5, "How to Perform Trouble Diagnosis For Quick And Accurate Repair"
and perform tests as out-
lined to simulate driving conditions environment. If symptom appears. Refer to
, and perform applicable trouble diagnosis procedures.
HAC-8
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
FUNCTION INFORMATION
SYSTEM DESCRIPTION
FUNCTION INFORMATION
Component Part Location
INFOID:0000000009882435
ENGINE COMPARTMENT
AWIIA1075ZZ
1.
Horn (view with grille removed)
2.
Refrigerant pressure sensor E48
3.
A/C compressor F3
4.
Ambient sensor E1 (view with grille
removed)
5.
Water valve F68
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст