Last Modified: 07-31-2024 |
6.11:8.1.0 |
Doc ID: RM1000000026Z8Z |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [09/2022 - 11/2022] |
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for TMC Made, and Gasoline Model, with Automatic Air Conditioning System): Recirculated/Fresh Air Modes Switch without User Input; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022] |
Recirculated/Fresh Air Modes Switch without User Input
|
DESCRIPTION
If recirculation/fresh mode changes unintentionally and without permission, the following causes are possible.
Symptom
|
Factor
|
-
Recirculation/fresh mode changes without permission
-
Recirculation/fresh mode light blinks
|
-
Customize setting
-
Change in ambient air temperature
-
Decrease in refrigerant pressure
-
Air conditioning pressure sensor circuit malfunction
-
Engine coolant temperature (high)
|
PROCEDURE
(a) Read the Data List according to the display on the GTS.
Body Electrical > Air Conditioner > Data List
Tester Display
|
Measurement Item
|
Range
|
Normal Condition
|
Diagnostic Note
|
Efficient Ventilation Mode
|
Function to automatically change ambient air induction and room circulation is set.
|
OFF / ON
|
Customized value displayed
|
-
|
Body Electrical > Air Conditioner > Data List
Tester Display
|
Efficient Ventilation Mode
|
Result
|
Proceed to
|
Efficient Ventilation Mode is set to "OFF"
|
A
|
Efficient Ventilation Mode is set to "ON"
|
B
|
B |
|
CUSTOMIZE SETTING (Efficient Ventilation Mode to "OFF")
|
A
|
|
|
(a) Read the Data List according to the display on the GTS.
Body Electrical > Air Conditioner > Data List
Tester Display
|
Measurement Item
|
Range
|
Normal Condition
|
Diagnostic Note
|
Ambient Temperature Sensor
|
Ambient temp. sensor (thermistor assembly)
|
-327.68 to 327.67°C
|
Actual ambient temperature displayed
|
Ambient temp. sensor (thermistor assembly) circuit malfunction
|
Body Electrical > Air Conditioner > Data List
Tester Display
|
Ambient Temperature Sensor
|
OK:
The value of the display does not change frequently.
OK
|
|
|
3.
|
READ VALUE USING GTS (COOLANT TEMPERATURE)
|
(a) Read the Data List according to the display on the GTS.
Powertrain > Engine > Data List
Tester Display
|
Measurement Item
|
Range
|
Normal Condition
|
Diagnostic Note
|
Coolant Temperature
|
Engine coolant temperature
|
Min.: -40°C (-40°F)
Max.: 140°C (284°F)
|
75 to 100°C (167 to 212°F): After warming up
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This is the engine coolant temperature.
HINT:
-
After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F).
-
After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal.
-
If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted.
-
Check if the engine overheats if the value indicated is higher than 135°C (275°F).
|
Powertrain > Engine > Data List
Tester Display
|
Coolant Temperature
|
OK:
The value of the display does not change frequently.
NG |
|
GO TO COOLING SYSTEM
for G16E-GTS: Click here
for M20A-FKS: Click here
|
OK
|
|
|
4.
|
CHECK REFRIGERANT PRESSURE
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(a) Install a manifold gauge set.
Click here
(b) Prepare the vehicle according to the table below.
Measurement Condition:
Item
|
Condition
|
Doors
|
Fully open
|
A/C Switch
|
On
|
Recirculation/fresh Control Switch
|
Recirculation
|
Set Temperature
|
MAX COLD
|
Blower Speed
|
HI
|
Air Conditioning Air Inlet Temperature
|
25 to 35°C (77 to 95°F)
|
(c) Compare the values displayed in the Data List and on the manifold gauge.
Body Electrical > Air Conditioner > Data List
Tester Display
|
Measurement Item
|
Range
|
Normal Condition
|
Diagnostic Note
|
Regulator Pressure Sensor
|
Air conditioning pressure sensor
|
-32.768 to 32.767 MPaG
|
Actual refrigerant pressure displayed
|
-
Refrigerant line (gas leak etc.)
-
Air conditioning pressure sensor circuit malfunction
|
Body Electrical > Air Conditioner > Data List
Tester Display
|
Regulator Pressure Sensor
|
OK:
The values displayed in the Data List and on the manifold gauge match.
|