Nissan Pathfinder (2008 year). Manual - part 453

HAC-168

< ECU DIAGNOSIS >

[MANUAL AIR CONDITIONER]

AIR CONDITIONER CONTROL

ALIIA0075GB

AIR CONDITIONER CONTROL

HAC-169

< ECU DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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ALIIA0076GB

HAC-170

< ECU DIAGNOSIS >

[MANUAL AIR CONDITIONER]

AIR CONDITIONER CONTROL

ALIIA0077GB

AIR CONDITIONER CONTROL

HAC-171

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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SYMPTOM DIAGNOSIS

AIR CONDITIONER CONTROL

Symptom Matrix Chart

INFOID:0000000001366770

SYMPTOM TABLE

Symptom

Reference Page

A/C system does not come on.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-159

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 malfunctioning.

Go to Trouble Diagnosis Procedure for Front Blower Motor.

HAC-146

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

HAC-172

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

INSUFFICIENT COOLING

INSUFFICIENT COOLING

Component Function Check

INFOID:0000000001366771

SYMPTOM: Insufficient cooling

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE 

1.

Turn temperature control dial counterclockwise to maximum cold.

2.

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 XX-XX, "*****".

Does another symptom exist?

YES

>> Refer to XX-XX, "*****". 

NO

>> System OK.

3.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 4.

4.

CHECK DRIVE BELTS 

Check compressor belt tension. Refer to XX-XX, "*****".
Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Adjust or replace compressor belt. Refer to XX-XX, "*****".

5.

CHECK AIR MIX DOOR OPERATION

Check and verify air mix door mechanism for smooth operation. 

Does air mix door operate correctly?

YES

>> GO TO 6.

NO

>> Repair or replace air mix door control linkage.

6.

CHECK COOLING FAN MOTOR OPERATION

Check and verify cooling fan motor for smooth operation. Refer to XX-XX, "*****".

Does cooling fan motor operate correctly?

YES

>> GO TO 7.

NO

>> Check cooling fan motor. Refer to XX-XX, "*****". 

7.

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 8.

8.

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 9.

NO

>> Check contaminated refrigerant. Refer to XX-XX, "*****".

INSUFFICIENT COOLING

HAC-173

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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9.

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 XX-XX, "*****".

NO

>> GO TO 10.

10.

CHECK REFRIGERANT PRESSURE

Check refrigerant pressure with manifold gauge connected. Refer to XX-XX, "*****". 

OK or NG

OK

>> Perform performance test diagnoses. Refer to XX-XX, "*****".

NG

>> GO TO 11.

11.

CHECK AIR DUCTS

Check ducts for air leaks.

Is the inspection result normal?

YES

>> System OK.

NO

>> Repair air leaks.

Performance Test Diagnoses

INFOID:0000000001366772

PERFORMANCE TEST DIAGNOSES

HAC-174

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

INSUFFICIENT COOLING

*1

XX-XX, "*****"

*2

"Test Reading"

*3

XX-XX, "*****"

*4

XX-XX, "*****"

RJIA1601E

INSUFFICIENT COOLING

HAC-175

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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Performance Chart

INFOID:0000000001366773

PERFORMANCE CHART

Test Condition

*1

XX-XX, "*****"

*2

XX-XX, "*****"

*3

XX-XX, "*****"

RJIA3107E