AIR CONDITIONER SYSTEM CHECK AND REFRESH CAMPAIGN CHECK

SHEET
CUSTOMER & VEHICLE DETAILS
Customer’s Name:
Customer’s Address:
Customer’s Telephone No.:
Vehicle Registration No.: Customer’s remarks: No problem Concerned
Model / Chassis No.: A/C performance
Mileage: A/C odor
Date Checked: Engine performance
Engine coolant temperature
Others:

We performed the following free inspections on your vehicle.

Recommend
for next visit
Notes
Attention
INSPECTION ITEMS Urgent Quotation
Cost Time
OK

( ) (min)

1) Engine coolant level and condition

2) Radiator cap valve function
3) Engine cooling system leak test
4) Engine coolant hoses and pipes
5) Condenser & Radiator
6) Cooling fan blade / coupling
7) Drive belts
Visual check (Compressor, Liquid tank,
8)
Service valve, Hoses)
In-cabin Microfilter replacement
9)
interval
10) Thermostat function (LLC flow)
11) Blower function (All speeds/modes)
A/C switch function (Including
12)
compressor clutch ON/Off function)
Cooling fan operation (On>Off,
13)
Off>On)
14) A/C Performance and odor
A/C system leak test (Fluorescent dye
15)
type or Electrical type)

Definition:
Service Advisor’s Name / Signature: Overall Findings: V Inspected OK
X Replaced
R Repaired
Date: A Adjusted
T Tightened
Dealer’s Name: C Cleaned
L Lubricated
-- Not Applicable
 AIR CONDITIONER SYSTEM CHECK AND REFRESH
CHECKING PROCEDURE
Equipment ---
Tools Radiator cap tester & adapter, Fluorescent dye leak detector (UV lamp and safety glasses) or
Electrical leak detector, Thermometer
Parts ---
Resources Service Manual, Lint-free towel

Operation Operation flow Remarks

Prepare the vehicle Set the vehicle in a service bay that is indoors or in a Caution:
If the shop is equipped
shaded area with good ventilation. with an exhaust
system, connect an
Release the hood lock and then open the hood. Set the exhaust hose to the
vehicle’s tailpipe.
hood support rod to the proper position if so equipped.
Stop the engine.
1) Inspect the engine coolant Caution:
Remove radiator cap and check coolant surface level. Do not remove the cap
level and condition immediately after
Surface distance from radiator neck is lower stopping the engine.
Be careful not to allow
than 50mm: coolant to come into
- top up coolant contact with the drive
belts.
- check visually if coolant is leaking
Findings:
Measure coolant density using coolant tester.Deteriorated coolant,
Malfunctioning radiator
Out of specification: Recommend to replace cap
New Used coolant
In case there is no coolant tester, check visually
Check coolant surface level at reservoir tank.
Lower than ‘H’ level: top up coolant
Findings:
If coolant is extremely dirty, remove reservoir
Low coolant level
tank and wash.

2) Check the radiator cap Check visually radiator cap sealing rubber.
valve function Rubber deteriorated: Recommend to replace
radiator cap
Check radiator cap relief pressure with radiator cap
tester.
Radiator cap relief pressure limit:
- T30, D21/D22, R50, B14, N16, A32/A33,
Y31/Y33, and F50: 59-98kPa
(0.6kg/cm2-1.0kg/cm2)
- Y61(TB engine): 108-127kPa
(1.1kg/cm2-1.3kg/cm2)
- Y61 (TD/RD engine): 78-98kPa
(0.8kg/cm2-1.0kg/cm2)
*For other model, Refer to the Service
Manual MINTENANCE section.
Lower than above: Recommend to replace
radiator cap
 Operation Operation flow Remarks
3) Check the engine cooling Apply pressure to the cooling system with a radiator cap Findings:
Leaking
system leakage tester & adaptor.
Testing pressure:
- T30, D22, R50, B14, N16, A32/A33, Y33,
F50, and Y61(TD) : 157kPa (1.6kg/cm2)
-
Y61(TB/RD): 98kPa (1.0kg/cm2)
*For other models, Refer to the Service Manual
MAINTENANCE section.
Pressure decreases: Check leakage in the
cooling system
Leakage found: Recommend to replace relevant
parts
4) Inspect the engine coolant Check the condition of water hoses (radiator hoses, Findings:
Improperly attached,
hoses and pipes heater hoses and other water hoses around the Cracked, Damaged,
Chafed, Leaking
engine).
Hose rubber damaged, hardened or cracked:
Recommend to replace whole set of hoses.

5) Inspect the condenser & Inspect the appearance of the condenser and radiator. Caution:
To avoid damage to the
radiator Remove blockages and clean the core with a soft brush condenser and radiator,
never use steam or
and soapy water if necessary. high-pressure washers
for this cleaning
Rinse the core with low-pressure water hose if operation.
necessary. Findings:
Blockage, Including
leaves, Twigs, Mud or
other debris
6) Inspect cooling fan blade Inspect the appearance of the cooling fan blade and Findings:
Deformation, Broken
/coupling coupling

7) Inspect the drive belts (in case it is easier to access from the top) Findings:
Cracked, Frayed, Worn,
Twist drive belt and check rubber condition of the Broken, Oil adhesion,
Slipping, Deflection
inner side surface.
Cracked: Recommend to replace the belt.
Check drive belt tension and adjust if deflection is
New Used excessive
 Operation Operation flow Remarks
8) Conduct the A/C system Conduct the A/C system component visual check of Findings:
component visual check Poor fittings, Leakage,
all component parts for refrigerant leaks. Damaged, Corroded

A/C Component parts:

Compressor, Liquid tank, Service valves,
Condenser, Hoses, Pipes, and connections

9) Check the In-cabin Find the installation label or replacement label within Findings:
Recommended
Microfilter (=Ventilation Air the glove box and check the installation /replacement replacement period is
overdue.
Filter) installation/replacement date. (For some vehicle models, the label will be hard
label to find, so check carefully)

Start the engine. Start the engine. ---

10) Check thermostat function Ensure the engine is warmed up and thermostat is Findings:
No LLC flow
open
Rev engine with radiator cap removed and check
through the Radiator filler neck that LLC flows in the
radiator.
Reinstall the radiator cap.
11) Check the blower function Operate the fan switch/control knob to 1st-speed. ---

The blower should operate at 1st-speed.

The indicator should show 1st-speed on the auto A/C
display.
Operate the fan switch/control knob (up side) to
2nd-speed.
The blower should operate at 2nd-speed.
Continue checking the blower speed until all speeds
have been checked.
Leave the blower on MAX speed.
12) Check the A/C switch [For manual air conditioner] Caution:
Discharge air and
[Manual] Check the “A/C (air conditioner)” switch: blower speed will
depend on ambient,
Operate the fan control knob to the desired position. in-vehicle and set
temperatures.
Operate the air conditioner switch to ON.
Confirm that the indicator light comes on when the
air conditioner is ON.
Visually confirm that the compressor clutch is
engaged.
 Operation Operation flow Remarks
[Auto] [For auto air conditioner]
Check the AUTO mode:
Press the “AUTO” switch.
The display should indicate “AUTO” (no ECON, no
MANUAL).
Visually confirm that the compressor clutch is
engaged.

13) Check cooling fan operation Check the change of cooling fan operation by switching Findings:
Malfunction, No
A/C switch from Off to On or from On to Off change

(Function of Fan coupling or Fan motor & relay)

14) Conduct the A/C Close all of the doors and open the windows. Caution:
If the shop is equipped
performance test Set the temperature control to full cold. with an exhaust
system, connect an
Set the mode control to vent (face mode). exhaust hose to the
vehicle’s tailpipe.
Turn the re-circulation switch on.
Set the fan speed to the maximum speed.
Turn the A/C switch on.
Check the discharged air temperature at the center
vent using a thermometer.
Specified air temperature:
Refer to the performance test in the
Service Manual AIR CONDITIONER section.
Shut off the engine Shut off the engine. ---

Preparation for leak test Check for the identification label that shows the factory Example:
Identification label
installed fluorescent dye (“Nissan UV Luminous Oil
Type S”) on the under side of the hood for the vehicles.
Refer to the example.
If there is the label, conduct the leak test using the
fluorescent dye leak detector.
If there is no label, conduct the leak test using the
electrical leak detector.
 Operation Operation flow Remarks
15) Conduct the A/C system [Fluorescent dye type] Caution:
UV safety glasses
leak test Check for refrigerant leaks using the fluorescent dye leak protect your eyes and
enhance the visibility
[Fluorescent dye type] detector: of the fluorescent
dye.
Put on the UV safety glasses. Should be inspected
immediately after
Illuminate all component parts with the UV lamp. stopping the engine.
Some leaks are more
Component parts: easily detected when
Compressor, Liquid tank, Service valves, pressure is high.

condenser, Hoses, Pipes, and connections Findings:

Leaks
The dye will appear as a bright green/yellow area at the
point of leakage.
If the suspected area is difficult to see, use an
adjustable mirror or wipe the area with a lint free towel,
then inspect the cloth with the UV lamp for dye residue.
[Electrical type] [Electrical type] Caution:
Moving the electrical
Check for refrigerant leaks using the electrical leak leak detector probe
slower and closer to
detector: the suspected leak
area will improve the
Conduct the leaks test from the high side to the low chances of finding a
leak.
side. Should be inspected
Perform a leak test on all component parts with the immediately after
stopping the engine.
electric leak detector. Some leaks are more
easily detected when
Component parts: pressure is high.
Do not allow the
Compressor, Liquid tank, Service valves, sensor tip of the
detector to contact
Condenser, Hoses, Pipes, and Connections with any substance.
Position the probe approximately 5 mm away from point Findings:
to be inspected. Leaks

Move the probe along the component at approximately

25 to 50 mm/sec.
Clean the component to be inspected and move the
leak detector probe over the entire component.
If the leak detector detects a leak. Inspect the
suspected leak area again after blowing compressed
air.
Do not stop when one leak is found. Continue to search
for additional leaks in all system components.
Verify all inspections Verify that all inspections have been performed. ---
Close the hood Close and lock the hood completely. ---
 1/2
S/A GUIDE FOR AIR CONDITIONER SYSTEM CHECK AND REFRESH CAMPAIGN
ENGINE COOLING SYSYTEM
10) Thermostat

1) Engine coolant
7) Drive belts

2) Radiator cap

3) Engine cooling system

6) Cooling fan
blade and coupling

5) Condenser
& Radiator
4) Engine coolant hoses and pipes
 2/2
S/A GUIDE FOR AIR CONDITIONER SYSTEM CHECK AND REFRESH CAMPAIGN
AIR CONDITIONER CHECK UP POINTS
9) In-Cabin Microfilter (A/C Filter)

13) Cooling fan

11) A/C blower

8) Service valve
12) A/C switch

14) A/C performance

(Check the discharged
air temperature)

8) Liquid tank

8) A/C hose

15) A/C system leak

8) Compressor
 S/A REFERENCE FOR AIR CONDITIONER SYSTEM CHECK AND REFRESH CAMPAIGN
No. ITEM FUNCTION WHAT HAPPENS IF DAMAGES ARE NEGLECTED
1 Engine coolant level and condition ・Anti-freeze ---
・Coolant will leak from radiator because of perforation caused by
・Anti-corrosion
corrosion
・Raise coolant boiling point ・Engine will overheat
2 Radiator cap valve function The radiator cap raises the boiling point of the cooling If engine coolant boiling temperature lowers due to improper radiator
water, by increasing pressure inside the radiator, thereby cap function, heat transfer performance form the radiator to the
increasing its temperature range and improving its atmosphere becomes insufficient. Therefore, the engine will overheat.
cooling facility.

3 Engine cooling system leak test Engine gets overheated.

-----
4 Engine coolant hoses and pipes Passage where coolant flows Cracks makes coolant leak out and if the coolant level drops, the
engine may overheat
5 Condenser and Radiator - Condenser: A/C inoperative: High temperature vapor cannot be cooled. As a result
High-temperature vapor entering the condenser is air temperature cannot be controlled.
cooled by air passing around its fins. When the vapor is
cooled, it begins to condense to liquid form.

- Radiator Engine becomes overheated and stops.

To cool LLC by passing around its fins to keep the
engine at the suitable temperature.

6 Cooling fan blade / Coupling To cool radiator and LLC inside the radiator. Engine becomes overheated and stops.
No. ITEM FUNCTION WHAT HAPPENS IF DAMAGES ARE NEGLECTED
7 Drive belts Drive belts are connected to water Water pump/alternator/power steering pump and A/C compressor
pump/alternator/power steering pump and A/C does not work, and it will result in the following situation:
compressor and it drives each of them. ・Water pump:
Engine becomes overheated and stops.
・Alternator:
Battery cannot be charged and engine stops. It is impossible to
re-start.
・Power steering pump:
The feel of the steering wheel becomes extremely heavy and
handling it becomes very difficult, resulting in customer’s panic and
may lead to an accident.
・A/C compressor:
Refrigerant cannot be compressed, thus it will not become a vapor at
high pressure and a high temperature. As a result air temperature
cannot be controlled
8 A/C system component visual Check - Compressor: A/C inoperative: Refrigerant cannot be compressed, thus it will not
It draws the vaporized refrigerant at a low pressure and become a vapor at high pressure and a high temperature. As a result
a low temperature, and compresses it to become a air temperature cannot be controlled.
vapor at high pressure and a high temperature.
- Condenser: A/C inoperative: High temperature vapor cannot be cooled. As a result
High-temperature vapor entering the condenser is air temperature cannot be controlled.
cooled by air passing around its fins. When the vapor is
cooled, it begins to condense to liquid form.
- Liquid tank: A/C inoperative: Pure liquid refrigerant cannot be collected. As a result
It completely separates the liquid refrigerant from air temperature cannot be controlled.
the vapor, and It stores the refrigerant until the
necessary amount of refrigerant, which dirt and
moisture are removed from, is taken out.
- Service valve: A/C inoperative: Refrigerant will leak out, which reduces A/C
Valve to discharge and charge refrigerant. performance. In worst scenario, air temperature cannot be controlled.
- Hoses: A/C inoperative: Refrigerant will leak out, which reduces A/C
It delivers refrigerant to compressor, condenser, performance. In worst scenario, air temperature cannot be controlled.
expansion valve, evaporator and back to compressor
9 In-cabin Microfilter replacement interval It filters out all dust, sand, spores, etc. from the air that Dust, sand, spores, etc. can be flown into the inside cabin through
passes through the air conditioning system, so that the air conditioning system, or clogged filter spoils A/C performance.
air inside the car kept clean and fresh.
No. ITEM FUNCTION WHAT HAPPENS IF DAMAGES ARE NEGLECTED
10 Thermostat function (LLC flow) Automatically maintains the cooling water at a certain ・If it gets stuck closed: engine will overheat because of lack of water
temperature level by changing the water volume flow into radiator when the engine gets hot.
circulating in the radiator. ・If it gets stuck open: fuel consumption becomes worse and leads to
premature engine wear due to longer warm-up period.
11 Blower Function Send discharged air into in-cabin through air outlets. A/C inoperative: Discharged air will not come to in-cabin.

12 A/C Switch Function It controls Air conditioner operation. A/C inoperative

13 Cooling fan operation Take air in from outside the vehicle to dissipate heat by Engine gets overheated.
radiator particularly when the car is not moving.
14 A/C performance and odor - Odor Buster Unpleasant odors may flow into the inside cabin through air
It removes all sources of unpleasant odor in the A/C conditioning system, due to dust, bacteria, mold, and nicotine etc.
evaporator, such as dust, bacteria, mold, and nicotine adhere to the A/C evaporator
with a special liquid and a high-pressure nozzle.
15 A/C system leak test A/C inoperative: Leak will lead to total loss of refrigerant which makes
the whole system inoperative. Simply attempting to recharge the
-----
refrigerant without fixing the leak will also lead to waste of customer’s
money and harm to the environment.