If none of the switch indicators on the air conditioning control assembly illuminate, the following factors may be the cause.
| Malfunction Status | Factor |
|---|---|
| A/C switch indicator does not illuminate | ·
Air conditioning amplifier assembly malfunction ·
Air conditioning control assembly malfunction ·
Mechanical locking of damper and damper link ·
Refrigerant pressure is extremely low ·
Low detected ambient temperature (including thermistor assembly malfunction) |
Read the Data List according to the display on the GTS.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Ambient Temperature Sensor | Ambient temp. sensor (thermistor assembly) | -327.68 to 327.67°C | Actual ambient temperature displayed | Ambient temp. sensor (thermistor assembly) circuit malfunction |
| Tester Display |
|---|
| Ambient Temperature Sensor |
The display is as specified in the normal condition column (0°C (32°F) or higher).
| Proceed to |
|---|
| OK |
| NG |
OK
NG