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Nissan Titan. Manual - part 415

MANUAL A/C IDENTIFICATION TABLE

HAC-165

< SYMPTOM DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

HAC

SYMPTOM DIAGNOSIS

MANUAL A/C IDENTIFICATION TABLE

Application Table

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Manual A/C Type

Description

Visual Identification

Manual A/C (Type 1)

Two Control Dial System

Manual 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

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SYMPTOM TABLE

Symptom

Reference Page

A/C system does not come on.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-150

A/C system cannot be controlled.

Go to Self-diagnosis Function.

HAC-114

Air outlet does not change.

Go to Trouble Diagnosis Procedure for Mode Door Motor.

HAC-116

Mode door motor is malfunctioning.

Discharge air temperature does not change.

Go to Trouble Diagnosis Procedure for Air Mix Door Motor.

HAC-120

Air mix door motor is malfunctioning.

Intake door does not change.

Go to Trouble Diagnosis Procedure for Intake Door Motor.

HAC-125

Intake door motor is malfunctioning.

Defroster door motor is malfunctioning.

Go to Trouble Diagnosis Procedure for Defroster Door Motor.

HAC-127

Front blower motor operation is malfunction-
ing.

Go to Trouble Diagnosis Procedure for Front Blower Motor.

HAC-131

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet Clutch.

HAC-137

Insufficient cooling

Go to Trouble Diagnosis Procedure for Insufficient Cooling.

HAC-167

Insufficient heating

Go to Trouble Diagnosis Procedure for Insufficient Heating.

HAC-175

Noise

Go to Trouble Diagnosis Procedure for Noise.

HAC-177

Self-diagnosis cannot be performed.

Go to Trouble Diagnosis Procedure for Self-diagnosis.

HAC-67

INSUFFICIENT COOLING

HAC-167

< SYMPTOM DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

HAC

INSUFFICIENT COOLING

Component Function Check

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SYMPTOM: Insufficient cooling

INSPECTION FLOW

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.

>> GO TO 2.

CHECK FOR ANY SYMPTOMS

Perform a complete operational check for any symptoms. Refer to

HAC-99, "Operational Check"

Does another symptom exist?

YES

>> Refer to

HAC-166, "Symptom Matrix Chart"

>> System OK.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> If equipped with NAVI, GO TO 4.

>> If not equipped with NAVI, GO TO 5.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis Refer to

HAC-114, "Front Air Control Self-Diagnosis"

Is the inspection result normal?

YES

>> GO TO 5.

>> Refer to

HAC-166, "Symptom Matrix Chart"

CHECK DRIVE BELTS

Check compressor belt tension. Refer to

EM-14, "Checking Drive Belts"

Is the inspection result normal?

YES

>> GO TO 6.

>> Adjust or replace compressor belt. Refer to

EM-14, "Removal and Installation"

CHECK AIR MIX DOOR OPERATION

Check and verify air mix door mechanism for smooth operation. Refer to

HAC-120, "Air Mix Door Motor Com-

ponent Function Check"

Does air mix door operate correctly?

YES

>> GO TO 7.

>> Check air mix door motor circuit. Refer to

HAC-121, "Air Mix Door Motor Diagnosis Procedure"

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.

>> Check cooling fan motor. Refer to

EC-379, "Diagnosis Procedure"

CHECK WATER VALVE OPERATION

Check and verify water valve for smooth operation. Refer to

HAC-142, "Description"

Does water valve operate correctly?

YES

>> GO TO 9.

HAC-168

< SYMPTOM DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

INSUFFICIENT COOLING

>> Check water valve circuit. Refer to

HAC-142, "Water Valve Diagnosis Procedure"

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.

>> 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"

>> GO TO 12.

12.

CHECK REFRIGERANT PRESSURE

Check refrigerant pressure with manifold gauge connected. Refer to

HAC-170, "Performance Chart"

Is the inspection result normal?

YES

>> Perform performance test diagnoses. Refer to

HAC-168, "Diagnostic Work Flow"

>> GO TO 13.

13.

CHECK AIR DUCTS

Check ducts for air leaks.
Is the inspection result normal?

YES

>> System OK.

>> Repair air leaks.

Diagnostic Work Flow

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