- Check for refrigerant leaks using a halogen leak detector, and repair if necessary.
-
Evacuate the air conditioning system and charge it with the appropriate volume of new or purified refrigerant.
for HFC-134a (R134a): Click here
![2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - ]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFC-134a(R134a)): REPLACEMENT](/t3Portal/stylegraphics/info.gif)
for HFO-1234yf (R1234yf): Click here
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001H96Y |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): UTILITY; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
UTILITY
REFRIGERANT HIGH PRESSURE HISTORY CLEAR
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Press the OFF switch.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / Air Conditioner / Utility / Refrigerant High Pressure History Clear.
Body Electrical > Air Conditioner > Utility
|
Tester Display |
|---|
|
Refrigerant High Pressure History Clear |
REFRIGERANT SHORTAGE CHECK USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Utility / Refrigerant Gas Volume Check.
Body Electrical > Air Conditioner > Utility
|
Tester Display |
|---|
|
Refrigerant Gas Volume Check |
(e) Check that the following conditions are met and perform the refrigerant shortage check according to the display on the Techstream.
Measurement Condition:
|
Item |
Condition |
|---|---|
|
A/C switch |
On |
|
Ambient temperature* |
0 to 49°C (32 to 120°F) |
|
Blower speed |
HI |
*: If the ambient temperature is not within the range shown, do not perform this check.
HINT:
- Refer to the Techstream operator's manual for further details.
- A message indicating a refrigerant shortage is displayed on the Techstream and the air conditioning system turns off if the amount of refrigerant in the system is insufficient.
- DTCs are not stored when performing the refrigerant shortage check using the Techstream.
Result:
|
Result |
Amount of Refrigerant |
Corrective Action |
|---|---|---|
|
Refrigerant shortage |
Insufficient |
|
|
Refrigerant correct |
Correct |
- |
|
|