- Compressor with motor assembly malfunction
- Lack of refrigerant gas
- Cooler expansion valve (opened too far)
- Mode damper servo malfunction
- Mode damper and link operation (jamming)
| Last Modified: 05-08-2025 | 6.11:8.1.0 | Doc ID: RM100000001QM7B |
| Model Year Start: 2021 | Model: RAV4 HV | Prod Date Range: [08/2020 - ] |
| Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): Front Window Fogging; 2021 - 2025 MY RAV4 HV [08/2020 - ] | ||
|
Front Window Fogging |
DESCRIPTION
If the front glass frequently fogs up when the air conditioning system is operated, the following causes are possible.
|
Malfunction Status |
Factor |
|---|---|
|
Front glass frequently fogs |
|
PROCEDURE
|
1. |
CHECK REFRIGERANT SHORTAGE |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON (READY).
(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) Prepare the vehicle according to the table below.
Measurement Condition:
|
Item |
Condition |
|---|---|
|
Vehicle Condition |
Ignition switch ON (READY) |
|
Doors |
Fully closed (windows also fully closed) |
|
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) |
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.
- *1: This inspection can be judged correctly only if the ambient temperature is within a range of 0 to 49°C (32 to 120°F). Therefore, postpone the test if the temperature is low.
- *2: This inspection can be judged correctly only if the air inlet temperature is within a range of 25 to 35°C (77 to 95°F). Therefore, postpone the test if the temperature is out of range.
|
Result |
Amount of Refrigerant |
|---|---|
|
Refrigerant shortage |
Insufficient or leakage |
|
Refrigerant correct |
Correct |
OK:
"Refrigerant correct" is displayed on the Techstream.
| NG |
|
|
|
2. |
CHECK OPERATION |
(a) When the MODE switch on the air conditioning control assembly is pushed, check that the air conditioning system changes DEF mode according to the switch operation.
OK:
Air conditioning system changes DEF mode.
| OK |
|
GO TO ON-VEHICLE INSPECTION (CHECK REFRIGERANT PRESSURE USING GAUGE) |
| NG |
|
|
|