Toyota Corolla Cross: A/C Switch Indicator does not Turn On
DESCRIPTION
If none of the switch indicators on the air conditioning control assembly illuminate, the following factors may be the cause.
|
Symptom | Factor |
|
A/C switch indicator does not illuminate |
- Air conditioning amplifier assembly malfunction
- Air conditioning control assembly malfunction
- A/C switch malfunction
- A/C switch indicator malfunction (including when indicator turned off without switch operation)
- Servo motor initialization (incomplete)
- Mechanical locking of damper and damper link
- Refrigerant pressure is extremely low
- Low detected ambient temperature (including thermistor assembly malfunction)
|
PROCEDURE
| 1. |
CHECK MALFUNCTION STATUS |
(a) Check the malfunction status of switch indicators on the air conditioning control assembly.
| Result | Proceed to |
|
Indicators are not always illuminated |
A |
| Indicators are not illuminated only immediately after starting the engine |
B |
| B |
.gif) | GO TO INITIALIZATION |
|
A |
.gif) | |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Air Conditioner > Data List
|
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note |
|
Ambient Temperature Sensor |
Thermistor assembly | Min.: -327.68°C (-557.82°F)
Max.: 327.67°C (-621.81°F) |
Actual ambient temperature displayed |
Ambient temperature sensor (thermistor assembly) circuit malfunction |
Body Electrical > Air Conditioner > Data List
|
Tester Display |
| Ambient Temperature Sensor |
OK:
The value displayed is 0°C (32°F) or higher.
| OK |
| INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET |
| NG |
| GO TO OTHER DIAGNOSIS PROCEDURE (Ambient Temperature Display System) |
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Symptom Factor
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Symptom Factor
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Symptom Factor
Windshield frequently fogs
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