Nissan Titan. Instruction — part 419
DIAGNOSIS AND REPAIR WORKFLOW
HAC-181
< BASIC INSPECTION >
[MANUAL A/C (TYPE 2)]
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DIAGNOSIS AND REPAIR WORKFLOW
How to Perform Trouble Diagnosis For Quick And Accurate Repair
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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
>> GO TO 4
4.
GO TO APPROPRIATE TROUBLE DIAGNOSIS
Go to appropriate trouble diagnosis. Refer to
HAC-243, "Symptom Matrix Chart"
>> GO TO 5.
5.
REPAIR OR REPLACE
Repair or replace the specific parts.
>> GO TO 7
6.
FINAL CHECK
Final check.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> GO TO 4
HAC-182
< BASIC INSPECTION >
[MANUAL A/C (TYPE 2)]
INSPECTION AND ADJUSTMENT
INSPECTION AND ADJUSTMENT
Operational Check
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The purpose of the operational check is to confirm that the system operates properly.
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-212, "Front Blower Motor Diagnosis Procedure"
If OK, continue with next check.
CHECKING DISCHARGE AIR
1. Rotate MODE control dial to each position and the DEF
mode.
2. 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-197, "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-206, "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 counterclockwise until maximum cold.
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
Door Motor Diagnosis Procedure"
.
If OK, continue the check.
CHECKING TEMPERATURE INCREASE
1. Rotate temperature control dial clockwise until maximum hot.
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
Door Motor Diagnosis Procedure"
.
If OK, continue with next check.
CHECK A/C SWITCH
1. Press A/C switch.
•
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.
Conditions
: Engine running and at normal operating temperature
INSPECTION AND ADJUSTMENT
HAC-183
< BASIC INSPECTION >
[MANUAL A/C (TYPE 2)]
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If NG, go to trouble diagnosis procedure for
HAC-217, "Magnet Clutch Diagnosis Procedure"
If all operational checks are OK (symptom cannot be duplicated), go to
HAC-181, "How to Perform Trouble
Diagnosis For Quick And Accurate Repair"
and perform tests as outlined. If symptom appears, refer to
and perform applicable trouble diagnosis procedures.
HAC-184
< SYSTEM DESCRIPTION >
[MANUAL A/C (TYPE 2)]
MANUAL A/C IDENTIFICATION TABLE
SYSTEM DESCRIPTION
MANUAL A/C IDENTIFICATION TABLE
Application Table
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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
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