Content .. 443 444 445 446 ..

Nissan Pathfinder (2008 year). Manual - part 445

HAC-104

< ECU DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR CONDITIONER CONTROL

ALIIA0089GB

AIR CONDITIONER CONTROL

HAC-105

< ECU DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

ALIIA0090GB

HAC-106

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AIR CONDITIONER CONTROL

SYMPTOM DIAGNOSIS

AIR CONDITIONER CONTROL

Symptom Matrix Chart

INFOID:0000000001366748

SYMPTOM TABLE

Symptom

Reference Page

A/C system does not come on.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-159

A/C system display is malfunctioning.

Go to AV System.

AV-178

AV-66

A/C system cannot be controlled.

Go to Self-diagnosis Function.

HAC-23

Air outlet does not change.

Go to Trouble Diagnosis Procedure for Mode Door Motor.

HAC-135

Mode door motor is malfunctioning.

Discharge air temperature does not change.

Go to Trouble Diagnosis Procedure for Air Mix Door Motor.

HAC-140

Air mix door motor is malfunctioning.

Intake door does not change.

Go to Trouble Diagnosis Procedure for Intake Door Motor.

HAC-143

Intake door motor is malfunctioning.

Front blower motor operation is malfunction-
ing.

Go to Trouble Diagnosis Procedure for Front Blower Motor.

HAC-146

Rear blower motor operation is malfunction-
ing.

Go to Trouble Diagnosis Procedure for Rear Blower Motor.

HAC-52

Rear discharge air temperature and/or air
outlet does not change.

Go to Trouble Diagnosis Procedure for Rear Air Control system.

HAC-61

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet Clutch.

HAC-152

Insufficient cooling

Go to Trouble Diagnosis Procedure for Insufficient Cooling.

HAC-172

Insufficient heating

Go to Trouble Diagnosis Procedure for Insufficient Heating.

HAC-181

Noise

Go to Trouble Diagnosis Procedure for Noise.

HAC-183

Self-diagnosis cannot be performed.

Go to Trouble Diagnosis Procedure for Self-diagnosis.

HAC-159

Memory function does not operate.

Go to Trouble Diagnosis Procedure for Memory Function.

HAC-119

INSUFFICIENT COOLING

HAC-107

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

INSUFFICIENT COOLING

Component Function Check

INFOID:0000000001366749

SYMPTOM: Insufficient cooling

INSPECTION FLOW

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE

Press the AUTO switch.

Turn temperature control dial (driver) counterclockwise until 16

C (60

F) is displayed.

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-123, "Operational Check"

Does another symptom exist?

YES

>> Refer to

HAC-171, "Symptom Matrix Chart"

>> System OK.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 3.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis Refer to

HAC-23, "A/C Auto Amp. Self-Diagnosis"

Is the inspection result normal?

YES

>> GO TO 5.

>> Refer to

HAC-24, "A/C System Self-Diagnosis Code Chart"

CHECK DRIVE BELTS

Check compressor belt tension. Refer to

EM-13, "Checking Drive Belts"

(VQ40DE) or

EM-153, "Checking

Drive Belts"

(VK56DE).

Is the inspection result normal?

>> GO TO 6.

>> Adjust or replace compressor belt. Refer to

EM-13, "Tension Adjustment"

EM-13, "Removal and

Installation"

(VQ40DE) or

EM-153, "Removal and Installation"

(VK56DE).

CHECK AIR MIX DOOR OPERATION

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

HAC-140, "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-141, "Air Mix Door Motor Diagnosis Procedure"

HAC-37, "Air Mix Door Motor (Passenger) Diagnosis Procedure"

CHECK COOLING FAN MOTOR OPERATION

Check and verify cooling fan motor for smooth operation.

Does cooling fan motor operate correctly?

YES

>> GO TO 8.

>> Check cooling fan motor.

CHECK WATER VALVE OPERATION (VK56DE ONLY)

Check and verify water valve for smooth operation. Refer to

HAC-72, "Water Valve Description (VK56DE)"

Does water valve operate correctly?

HAC-108

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INSUFFICIENT COOLING

YES

>> GO TO 8.

>> Check water valve circuit. Refer to

HAC-72, "Water Valve Diagnosis Procedure (VK56DE)"

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 9.

10.

CHECK REFRIGERANT PURITY

Connect recovery/recycling equipment to vehicle.

Confirm refrigerant purity in supply tank using recovery/recycling and refrigerant identifier.

Is the inspection result normal?

YES

>> GO TO 10.

>> Check contaminated refrigerant. Refer to

HAC-185, "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-173, "Performance Test Diagnoses"

>> GO TO 11.

12.

CHECK REFRIGERANT PRESSURE

Check refrigerant pressure with manifold gauge connected. Refer to

HAC-176, "Test Reading"

Is the inspection result normal?

YES

>> Perform performance test diagnoses. Refer to

HAC-173, "Performance Test Diagnoses"

>> GO TO 12.

13.

CHECK AIR DUCTS

Check ducts for air leaks.

Is the inspection result normal?

YES

>> System OK.

>> Repair air leaks.

Performance Test Diagnoses

INFOID:0000000001366750

INSUFFICIENT COOLING

HAC-109

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

HAC-175, "Performance Chart"

HAC-176, "Test Reading"

HAC-177, "Trouble Diagnoses for
Unusual Pressure"

HAC-140, "Air Mix Door Motor Com-
ponent Function Check"

RJIA1601E

HAC-110

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INSUFFICIENT COOLING

Performance Chart

INFOID:0000000001366751

Test Condition

XXX REMOVAL FOR COMPRES-
SOR CLUTCH

HAC-146, "Front Blower Motor Com-
ponent Function Check"

CHECK A/C COMPRESSOR BELT
XXXX

WJIA1371E

INSUFFICIENT COOLING

HAC-111

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

Testing must be performed as follows:

Test Reading

INFOID:0000000001366752

Recirculating-to-discharge Air Temperature Table

Ambient Air Temperature-to-operating Pressure Table

Vehicle location

Indoors or in the shade (in a well-ventilated place)

Doors

Closed

Door window

Open

Hood

Open

TEMP.

Max. COLD

Mode switch

(Ventilation) set

Recirculation (REC) switch

(Recirculation) set

Blower speed

Max. speed set

Engine speed

Idle speed

Operate the air conditioning system for 10 minutes before taking measurements.

Inside air (Recirculating air) at blower assembly inlet

Discharge air temperature at center ventilator

C (

Relative humidity

Air temperature

C (

50 - 60

20 (68)

5.3 - 6.5 (42 - 44)

25 (77)

9.7 - 11.5 (49 - 53)

30 (86)

13.8 - 16.3 (57 - 61)

35 (95)

18.0 - 21.2 (64 - 70)

40 (104)

22.2 - 25.7 (72 - 78)

60 - 70

20 (68)

6.5 - 7.7 (44 - 46)

25 (77)

11.5 - 13.3 (53 - 56)

30 (86)

16.3 - 18.8 (61 - 66)

35 (95)

21.2 - 24.0 (70 - 75)

40 (104)

25.7 - 29.2 (78 - 85)

Ambient air

High-pressure (Discharge side)

kPa (kg/cm

, psi)

Low-pressure (Suction side)

kPa (kg/cm

, psi)

Relative humidity

Air temperature

C (

50 - 70

20 (68)

680 - 840

(6.94 - 8.57, 98.6 - 121.8)

160 - 198

(1.63 - 2.02, 23.2 - 28.7)

25 (77)

800 - 985

(8.16 - 10.05, 116.0 - 142.8)

198 - 245

(2.02 - 2.50, 28.7 - 35.5)

30 (86)

940 - 1,150

(9.59 - 11.73, 136.3 - 166.8)

225 - 278

(2.30 - 2.84, 32.6 - 40.3)

35 (95)

1,160 - 1,410

(11.83 - 14.38, 168.2 - 204.5)

273 - 335

(2.78 - 3.42, 39.6 - 48.6)

40 (104)

1,325 - 1,620

(13.52 - 16.52, 192.1 - 234.9)

325 - 398

(3.32 - 4.06, 47.1 - 57.7)

Content .. 443 444 445 446 ..