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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SEE MORE:
CUSTOMIZE PARAMETERS CUSTOMIZE POWER BACK DOOR SYSTEM
HINT: The following items can be customized.
NOTICE:
When the customer requests a change in a function, first make sure that the function can be customized.
Record the current settings before customizing.
(a) Customizing with the GTS. (1
DIAGNOSIS SYSTEM
DESCRIPTION
The main body ECU (multiplex network body ECU) and certification ECU (smart key
ECU assembly) control the LIN communication system. LIN communication system data
and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector
3 (DLC3).
When the s
