PERFORMANCE TEST


TEST CONDITION


Item
 Settings
Environmental condition
 Measurement location
 In a shade or indoors
Temperature
 20°C - 50°C
Humidity
 Relative humidity 30 - 80%
Vehicle body condition
 Hood
 Fully opened
Door
 Fully opened
Window
 Fully opened
Air conditioner condition
 Air conditioner switch <Manual A/C>
 ON
Front side
 Air volume
 Maximum air volume
Temperature control
 MAX COOL
Air outlet
 FACE
Outside/inside air selection
 Air recirculation position
Rear side
 Air volume
 Maximum air volume
Engine speed
 Specified idle speed after warming up
Transmission
 N or P

TEST CONDITION SETTING
Check that the temperature/humidity of measurement location satisfies the test conditions, and then set the vehicle body conditions to the designated status according to the test conditions. If the temperature/humidity is not within the test conditions, an accurate judgement cannot be made. Therefore, postpone the performance test.

COOLING PERFORMANCE CHECK


1.Insert a thermometer into the position below.

  • Front side: Air outlet located at the centre of instrument panel
  • Rear side: Air outlet of headlining
note Set a thermometer so that cool air from the air outlet blows directly against the sensing part.
2.Set a wet and dry bulb thermometer in the air intake.

  • Front side: Front passenger’s foot area (below the glove box)
  • Rear side: Quarter trim slit section
note Set a wet and dry bulb thermometer so that cool air does not blow against it.
3.Start the engine to warm up. Confirm that the engine speed of the test condition is satisfied.
4.Set the heater controller to the mode instructed in the test conditions.
5.Wait until the air outlet temperature is stable (approximately 10 minutes after the A/C starts), and measure dry-bulb/wet-bulb temperatures at the air outlet and the air intake.
6.If the air outlet temperature is in the range specified by the table below, it is judged normal. If the temperature is outside the permissible range in the table below, refer to the refrigerant gas pressure inspection result, and check each section according to the diagnosis chart of refrigerant system.

<Vehicles without rear cooler>
Garage ambient temperature °C
 20
 30
 40
 50
Discharge air temperature °C
 3.0 - 16.0
 12.0 - 26.0
 22.0 - 36.0
 32.0 - 46.0

<Vehicles with rear cooler>
Garage ambient temperature °C
 20
 30
 40
 50
Discharge air temperature °C <Front side>
 5.0 - 18.0
 15.0 - 28.0
 24.0 - 37.0
 34.0 - 47.0
Discharge air temperature °C <Rear side>
 2.0 - 15.0
 12.0 - 25.0
 22.0 - 36.0
 33.0 - 46.0

REFRIGERANT GAS PRESSURE CHECK
caution
  • The temperature of equipment in the engine room is high and the refrigerant gas pressure is also high immediately after the engine and A/C operation are stopped, thus leave the vehicle for a while, and then perform the refrigerant gas pressure check.
  • On completion, stop the engine and wait until the high-pressure side of the gauge manifold is depressurised. Then remove the couplers and the others.


1.
caution
  • Place the coupler onto the service valve, and press to fit the part A securely until the sleeve clicks into place.
  • When connecting, run your hand along the hose while pressing to ensure that there are no bends in the hose.
Check that the engine and A/C are stopped.
2.Close the high-pressure valve of the gauge manifold.
3.Connect the charging hose (red) to the hi-pressure side of the gauge manifold.
4.Connect the coupler high side to the charging hose (red).
5.Install the coupler high side to the high-pressure side service valve of the vehicle.
6.Close the low-pressure valve of the gauge manifold.
7.Connect the charging hose (blue) to the low-pressure side of the gauge manifold.
8.Connect the coupler low side to the charging hose (blue).
9.Install the coupler low side to the low-pressure side service valve of the vehicle.
10.Start and fully warm up the engine, and then check that the engine speed of the test condition is satisfied.
11.Set the heater controller to the mode instructed in the test conditions.
12.Measure the high pressure/low pressure, and check that the measurement is within the permissible range of the table below. If the value is outside the permissible range, refer to the cooling performance check result, and perform a check according to the diagnosis chart of refrigerant system.
note Prior to the measurement, wait until the refrigerant pressure is stable. (Approximately 10 minutes after A/C operation start)

COOLING PERFORMANCE CHECK



<Vehicles without rear cooler>
Garage ambient temperature °C
 20
 30
 40
 50
Compressor high pressure mPa
 0.9 - 1.7
 1.5 - 2.3
 2.1 - 2.9
 2.7 - 3.4
Compressor low pressure mPa
 0.09 - 0.34
 0.20 - 0.45
 0.31 - 0.56
 0.42 - 0.67

<Vehicles with rear cooler>
Garage ambient temperature °C
 20
 30
 40
 50
Compressor high pressure mPa
 0.8 - 1.7
 1.6 - 2.4
 2.3 - 3.1
 3.0 - 3.9
Compressor low pressure mPa
 0.13 - 0.36
 0.26 - 0.49
 0.39 - 0.63
 0.53 - 0.76