Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: A/C Switch Indicator does not Turn On

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System (for Hev Model) / 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

2.

READ VALUE USING GTS

(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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