If none of the indicators on the air conditioning control assembly illuminate, the following malfunctions are possible.
| Malfunction Status | Factor |
|---|---|
| None of the indicators on the air conditioning control assembly illuminate. | ·
Air conditioning amplifier assembly malfunction ·
A/C switch (air conditioning control assembly) malfunction ·
Malfunction in one of the servo motors (initialization incomplete) ·
Damper and link operation (jamming) ·
Refrigerant pressure malfunction (low pressure) ·
Low ambient temperature (including thermistor assembly) |
Check the malfunction status of switch indicators on the air conditioning control assembly.
| Result | Proceed to |
|---|---|
| A/C switch indicators are not always illuminated | A |
| A/C switch indicators are not illuminated only immediately after starting the engine | B |
A
B
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Body Electrical / Air Conditioner / Data List.
Read the Data List according to the display on the GTS.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Ambient Temp Sensor | Thermistor assembly | Min.: -23.30°C (-9.94°F)
Max.: 65.95°C (150.71°F) |
Actual ambient temperature displayed | Thermistor assembly system malfunction
·
When open circuit: -23.30°C (-9.94°F) ·
When short circuit: 65.95°C (150.71°F) |
| Tester Display |
|---|
| Ambient Temp Sensor |
The display is as specified in the normal condition column (0°C (32°F) or higher).
| Proceed to |
|---|
| OK |
| NG |
OK
NG