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
Cooling effectiveness is poor
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Symptom Factor
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Symptom Factor
Windshield frequently fogs
SEE MORE:
OPERATION CHECK CHECK CUSTOMIZE PARAMETERS (a) The operation check below is based on the non-customized initial condition of the vehicle. (However, make sure that "ACC Customize" is set to "ON" using the multi-display.)
Click here CHECK PUSH-BUTTON START FUNCTION
(a) Check the push-button star
DESCRIPTION If the hybrid vehicle control ECU receives an invalid compressor control request from the air conditioning amplifier assembly via CAN communication, it will store this DTC.
DTC No. Detection Item
DTC Detection Condition
Trouble Area MIL
Warning Indicate Not
