Nissan Juke F15. Manual - part 833

DIAGNOSIS AND REPAIR WORKFLOW

HA-15

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000012197108

OVERALL SEQUENCE

DETAILED FLOW

1.

INTERVIEW FOR MALFUNCTION

Interview the symptom to the customer.

NNIIA0143GB

HA-16

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DIAGNOSIS AND REPAIR WORKFLOW

>> GO TO 2.

2.

SYMPTOM CHECK

Check the symptom from the customer's information. Check that any symptom occurs other than the inter-

viewed symptom.

Insufficient cooling/heating>>GO TO 3.

Refrigerant leakage>>GO TO 6.

Noise >> GO TO 7.

3.

CONTROL SYSTEM DIAGNOSIS

Perform the system diagnosis for the A/C control system.

• Refer to 

HAC-45, "Work Flow"

. (Automatic air conditioning)

• Refer to 

HAC-125, "Work Flow"

. (Manual air conditioning)

Is A/C control system normal?

YES

>> GO TO 4.

NO

>> GO TO 8.

4.

PERFORMANCE TEST

Perform the performance test. Check the operation of each part. Refer to 

HA-24, "Inspection"

.

>> GO TO 5.

5.

TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE

Diagnose using a manifold gauge whenever system's high and/or low side pressure(s) is/are unusual. Specify

the malfunctioning part. Refer to 

HA-25, "Symptom Table"

.

Low refrigerant charge>>GO TO 6.

Except above>>GO TO 8.

6.

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Specify the malfunctioning part. Refer to 

HA-17, "Leak Test"

.

>> GO TO 8.

7.

TROUBLE DIAGNOSIS FOR NOISE

Perform trouble diagnosis for noise. Specify the malfunctioning part. Refer to 

HA-27, "Symptom Table"

.

>> GO TO 8.

8.

MALFUNCTION PART REPAIR

Repair or replace the malfunctioning part.

>> GO TO 9.

9.

REPAIR CHECK (OPERATION CHECK)

Check the operation of each part.
Does it operate normally?

YES

>> INSPECTION END

NO

>> GO TO 2.

REFRIGERANT

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REFRIGERANT

Description

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CONNECTION OF SERVICE TOOLS AND EQUIPMENT

Leak Test

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CHECK REFRIGERANT LEAKAGE USING FLUORESCENT LEAK DETECTION DYE

1. Install a fender cover (1).
2. Wear UV safety goggles (2) provided with refrigerant dye leak detection kit.
3. Connect power cable (4) of UV lamp (6) to positive and negative terminals of the battery (3).
4. Press UV lamp switch (5) and check A/C system for refrigerant leakage. (Where refrigerant leakage

occurs, fluorescent leak detection dye appears in green color.)

WARNING:

1.

Shut-off valve

2.

A/C service valve

3.

Recovery/recycling/recharging 
equipment

4.

Refrigerant container (HFC-134a)

5.

Weight scale (J-39650)

6.

Vacuum pump (J-39649)

7.

Manifold gauge set (J-39183)

A.

Preferred (best) method

B.

Alternative method

C.

For charging

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HA-18

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REFRIGERANT

Never look directly into UV lamp light source.

NOTE:

• For continuous operating time of UV lamp, follow the manufacturer operating instructions.

• Illuminate piping joints from different angles using UV lamp and check that there is no leakage.

• Use a mirror in area that is difficult to see to check refrigerant leakage.

• Refrigerant leakage from evaporator can be detected by soaking cotton swab or a similar material with

drain hose water and illuminating it using UV lamp.

• Dust, dirt, and packing materials adhesive used for condenser, evaporator, and other locations may flu-

oresce. Be careful not to misidentify leakage.

5. Repair or replace parts where refrigerant leakage occurs and wipe off fluorescent leak detection dye.

NOTE:

Completely wipe off fluorescent leak detection dye from gaps between parts, screw threads, and others

using a cotton swab or similar materials.

6. Use a UV lamp to check that no fluorescent leak detection dye remains after finishing work.

WARNING:

Never look directly into UV lamp light source.

NOTE:

• For continuous operating time of UV lamp, follow the manufacturer operating instructions.

• Dust, dirt, and packing materials adhesive used for condenser, evaporator, and other locations may flu-

oresce. Be careful not to misidentify leakage.

CHECK REFRIGERANT LEAKAGE USING ELECTRICAL LEAK DETECTOR

WARNING:

Never check refrigerant leakage while the engine is running.

CAUTION:

Be careful of the following items so that inaccurate checks or misidentifications are avoided.

• Never allow refrigerant vapor, shop chemical vapors, cigarette smoke, or others around the vehicle.

• Always check refrigerant leakage in a low air flow environment so that refrigerant may not disperse

when leakage occurs.

1. Stop the engine.
2. Connect recovery/recycling/recharging equipment or manifold gauge set to A/C service valve.
3. Check that A/C refrigerant pressure is 345 kPa (3.52 kg/cm

2

, 50 psi) or more when temperature is 16

°C

(61

°F) or more. When pressure is lower than the specified value, recycle refrigerant completely and fill

refrigerant to the specified level.

NOTE:
Leakages may not be detected if A/C refrigerant pressure is 345 kPa (3.52 kg/cm

2

, 50 psi) or less when

temperature is less than 16

°C (61°F).

4. Clean area where refrigerant leakage check is performed, and check refrigerant leakage along all sur-

faces of pipe connections and A/C system components using electrical leak detector probe.

CAUTION:

• Continue checking when a leakage is found. Always continue and complete checking along all

pipe connections and A/C system components for additional leakage.

• When a leakage is detected, clean leakage area using compressed air and check again.

• When checking leakage of cooling unit inside, always clean inside of drain hose so that the

probe surface may not be exposed to water or dirt.

NOTE:

• Always check leakage starting from high-pressure side and continue to low-pressure side.

• When checking leakage of cooling unit inside, operate blower fan motor for 15 minutes or more at the

maximum fan speed while the engine is stopped, and then insert electrical leak detector probe into drain

hose and hold for 10 minutes or more.

• When disconnecting shut-off valve that is connected to A/C service valve, always evacuate remaining

refrigerant so that misidentification can be avoided.

5. Repair or replace parts where refrigerant leakage is detected. (Leakage is detected but leakage area is

unknown. GO TO 6.)

6. Start the engine and set A/C control in the following conditions.

• A/C switch ON

• Air flow: VENT (ventilation)

• Intake door position: Recirculation