- Compressor with motor assembly malfunction
- Refrigerant volume (low)
- Cooler expansion valve (opened excessively)
- No. 1 air conditioning radiator damper servo sub-assembly malfunction
- Mechanical locking of damper and damper link
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001H97V |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): Front Window Fogging; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
|
Front Window Fogging |
DESCRIPTION
If the windshield frequently fogs up even though the air conditioning system is operating, the following factors may be the cause.
|
Symptom |
Factor |
|---|---|
|
Windshield frequently fogs up |
|
PROCEDURE
|
1. |
PERFORM REFRIGERANT SHORTAGE CHECK |
(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.
|
Result |
Amount of Refrigerant |
|---|---|
|
Refrigerant correct |
Correct |
|
Refrigerant shortage |
Insufficient |
OK:
"Refrigerant correct" is displayed on the Techstream.
| NG |
|
CHARGE SYSTEM WITH REFRIGERANT for HFC-134a (R134a): Click here
for HFO-1234yf (R1234yf): 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)
|
|
2. |
CHECK OPERATION |
(a) Press the front defroster switch on the air conditioning control assembly and check that the air outlet mode changes to DEF mode.
OK:
The air outlet mode changes to DEF mode.
| OK |
|
INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET for HFC-134a (R134a): Click here
for HFO-1234yf (R1234yf): Click here
|
| NG |
|
|
|