Nissan Frontier. Manual - part 897

 

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Nissan Frontier. Manual - part 897

 

 

HAC-142

< SYMPTOM DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

AIR CONDITIONER CONTROL

AIR CONDITIONER CONTROL

Symptom Matrix Chart

INFOID:0000000009478361

SYMPTOM TABLE

Symptom

Reference Page

A/C system does not come on.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-128

Air outlet does not change.

Go to Trouble Diagnosis Procedure for Mode Door Motor.

HAC-103

Mode door motor is malfunctioning.

Discharge air temperature does not change.

Go to Trouble Diagnosis Procedure for Air Mix Door Motor.

HAC-108

Air mix door motor is malfunctioning.

Intake door does not change.

Go to Trouble Diagnosis Procedure for Intake Door Motor.

HAC-112

Intake door motor is malfunctioning.

Front blower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for Front Blower Motor.

HAC-115

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet Clutch.

HAC-121

Insufficient cooling

Go to Trouble Diagnosis Procedure for Insufficient Cooling.

HAC-143

Insufficient heating

Go to Trouble Diagnosis Procedure for Insufficient Heating.

HAC-151

Noise

Go to Trouble Diagnosis Procedure for Noise.

HAC-153

Self-Diagnosis cannot be performed

Go to Trouble Diagnosis Procedure for Self-Diagnosis.

HAC-101

INSUFFICIENT COOLING

HAC-143

< SYMPTOM DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

INSUFFICIENT COOLING

Component Function Check

INFOID:0000000009478362

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 

HAC-90, "Operational Check"

.

Does another symptom exist?

YES

>> Refer to 

HAC-142, "Symptom Matrix Chart"

NO

>> System OK.

3.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 4.

4.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis. Refer to 

HAC-101, "Front Air Control Self-Diagnosis"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Check symptom chart. Refer to 

HAC-142, "Symptom Matrix Chart"

.

5.

CHECK DRIVE BELTS 

Check compressor belt tension. Refer to 

EM-14, "Checking Drive Belts"

 (QR25DE) or 

EM-129, "Checking

Drive Belts"

 (VQ40DE).

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Adjust or replace compressor belt. Refer to 

EM-14, "Adjustment"

 (QR25DE) or  

EM-129, "Adjust-

ment"

 (VQ40DE).

6.

CHECK AIR MIX DOOR OPERATION

Check and verify air mix door mechanism for smooth operation. 
Does air mix door operate correctly?

YES (QR25DE)>>GO TO 8.

YES (VQ40DE)>>GO TO 7.

NO

>> Repair or replace air mix door control linkage.

7.

CHECK COOLING FAN MOTOR OPERATION

Check and verify cooling fan motor for smooth operation. Refer to 

EC-925, "Component Inspection"

 (for USA

and Canada) or 

EC-1343, "Component Inspection"

 (for Mexico). 

Does cooling fan motor operate correctly?

YES

>> GO TO 8.

NO

>> Check cooling fan motor. Refer to 

EC-840, "Diagnosis Procedure"

 (for USA and Canada) or 

EC-

1264, "Diagnosis Procedure"

 (for Mexico). 

8.

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.

HAC-144

< SYMPTOM DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

INSUFFICIENT COOLING

>> GO TO 9.

9.

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 10.

NO

>> Check contaminated refrigerant. Refer to 

HA-3, "Contaminated Refrigerant"

.

10.

CHECK FOR EVAPORATOR FREEZE UP

Start engine and run A/C. Check for evaporator freeze up.
Does evaporator freeze up?

YES

>> Perform diagnostic work flow. Refer to 

HAC-144, "Diagnostic Work Flow"

.

NO

>> GO TO 11.

11.

CHECK REFRIGERANT PRESSURE

Check refrigerant pressure with manifold gauge connected. Refer to 

HAC-146, "Performance Chart"

Is the inspection result normal?

YES

>> Perform diagnostic work flow. Refer to 

HAC-144, "Diagnostic Work Flow"

.

NO

>> GO TO 12.

12.

CHECK AIR DUCTS

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

YES

>> System OK.

NO

>> Repair air leaks.

Diagnostic Work Flow

INFOID:0000000009478363

 

 

 

 

 

 

 

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