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 magnet clutch assembly malfunction ·
Lack of refrigerant gas ·
Cooler expansion valve (opened too far) ·
Mode damper servo malfunction ·
Mode damper and link operation (jamming) |
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Body Electrical / Air Conditioner / Utility / Refrigerant Gas Volume Check.
| Tester Display |
|---|
| Refrigerant Gas Volume Check |
Check that the following conditions are met and perform the refrigerant shortage check according to the display on the GTS.
| 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 |
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.
| Result | Amount of Refrigerant |
|---|---|
| Refrigerant shortage | Insufficient or leakage |
| Refrigerant correct | Correct |
"Refrigerant correct" is displayed on the GTS.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
When the MODE switch on the air conditioning control assembly is pushed, check that the air conditioning system changes to DEF mode according to the switch operation.
Air conditioning system changes to DEF mode.
| Proceed to |
|---|
| OK |
| NG |
OK
NG