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 |
| GO TO INITIALIZATION |
A |
| |
(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) |
READ NEXT:
DESCRIPTION If the cooling effect of the air conditioning system is weak, the following factors may be the cause.
Symptom Factor
Cooling effectiveness is poor
Cooling respon
DESCRIPTION If the air conditioning system cannot be operated using the air conditioning control assembly, the following factors may be the cause.
Symptom Factor
Air conditioning syste
DESCRIPTION If the windshield frequently fogs up even though the air conditioning system is operating, the following factors may be the cause.
Symptom Factor
Windshield frequently fogs
SEE MORE:
DEFINITION OF TERMS
Term Definition
Monitor Description Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and details).
Related DTCs Group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection
DESCRIPTION If the air inlet mode cannot be changed between recirculation/fresh or exhaust gas odors can be smelled even though recirculation mode is selected, the following factors may be the cause.
Symptom Factor
Air inlet mode cannot be changed between recirculation/fresh