- Recirculation/fresh mode changes without permission
- Recirculation/fresh mode light blinks
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000025R3U |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - 11/2022] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Manual Air Conditioning System for Electrical Control Type): Recirculated/Fresh Air Modes Switch without User Input; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022] | ||
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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 |
|---|---|
|
|
|
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Air Conditioner > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Ambient Temp Sensor |
Thermistor assembly |
Min.: -23.30°C (-9.94°F) Max.: 65.95°C (150.71°F) |
Actual ambient temperature displayed |
Thermistor assembly circuit malfunction
|
Body Electrical > Air Conditioner > Data List
|
Tester Display |
|---|
|
Ambient Temp Sensor |
OK:
The value of the display does not change frequently.
| NG |
|
|
|
2. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List.
(e) Read the Data List according to the display on the Techstream.
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 |
This is the engine coolant temperature. HINT:
|
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
Coolant Temperature |
OK:
The value of the display does not change frequently.
| NG |
|
GO TO COOLING SYSTEM for M20A-FKS: Click here
for 2ZR-FAE: Click here
|
![2020 - 2025 MY Corolla Corolla Hatchback [09/2019 - ]; M20A-FKS (COOLING): COOLING SYSTEM: ON-VEHICLE INSPECTION](/t3Portal/stylegraphics/info.gif)
|
|
3. |
CHECK REFRIGERANT PRESSURE |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Air Conditioner > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Regulator Pressure Sensor |
Air conditioner pressure sensor |
Min.: -456.68 kPaG Max.: 3294.37 kPaG |
Actual refrigerant pressure displayed |
|
Body Electrical > Air Conditioner > Data List
|
Tester Display |
|---|
|
Regulator Pressure Sensor |
(f) Install a manifold gauge set.
(g) Read the manifold gauge pressure when the following conditions are met.
(1) Prepare the vehicle according to the table below.
Measurement Condition:
|
Item |
Condition |
|---|---|
|
Vehicle doors |
Fully open |
|
Temperature setting |
MAX COLD |
|
Blower speed |
HI |
|
A/C switch |
On |
|
Recirculation/fresh switch |
RECIRCULATION |
|
Interior temperature |
25 to 35°C (77 to 95°F) |
Standard Pressure:
Low pressure side
150 to 250 kPa (1.5 to 2.5 kgf/cm2, 22 to 36 psi)
High pressure side
1370 to 1570 kPa (14 to 16 kgf/cm2, 199 to 228 psi)
(h) Compare the values displayed in the Data List and on the manifold gauge.
OK:
The values displayed in the Data List and on the manifold gauge match.
| OK |
|
GO TO ON-VEHICLE INSPECTION (CHECK REFRIGERANT PRESSURE USING GAUGE) |
| NG |
|
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