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 | ·
Compressor with pulley assembly malfunction ·
Lack of refrigerant gas ·
Cooler expansion valve (opened too far) ·
Mode damper servo malfunction ·
Mode damper and link operation (jamming) |
Prepare the vehicle according to the table below.
| Item | Condition |
|---|---|
| Vehicle Condition | Engine running |
| A/C Switch | On |
| Ambient Temperature*1 | 0 to 49°C (32 to 120°F) |
| Air Conditioning Air Inlet Temperature*2 | 25 to 35°C (77 to 95°F) |
| Set Temperature | MAX COLD |
| Recirculation/fresh Control Switch | Recirculation |
| Air Vent Damper Position | FACE |
| Blower Speed | HI |
When the GTS is operated without the check conditions satisfied, "Refrigerant incorrect" is displayed. Select "Yes" to return to the previous screen.
Refer to the GTS operator's manual for further details.
A message indicating a refrigerant shortage is displayed on the GTS 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 GTS.
*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.
According to the GTS display, perform refrigerant gas volume check.
| Tester Display |
|---|
| Refrigerant Gas Volume Check |
| Result | Amount of Refrigerant |
|---|---|
| Refrigerant shortage | Insufficient or leakage |
| Refrigerant correct | Correct |
"Refrigerant correct" is displayed on GTS.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Press the front defroster switch on the air conditioning control assembly and check that the air outlet mode changes to DEF mode.
The air outlet mode changes to DEF mode.
| Proceed to |
|---|
| OK |
| NG |
OK
NG