Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026Z8R
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for TMC Made, and Gasoline Model, with Automatic Air Conditioning System): A/C Switch Indicator does not Turn On; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]

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.

Malfunction Status

Factor

A/C switch indicator does not illuminate

  • Air conditioning amplifier assembly malfunction
  • Air conditioning control assembly malfunction
  • 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

A/C switch indicators are not always illuminated

A

A/C switch indicators are not illuminated only immediately after starting the hybrid control system

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

Ambient temp. sensor (thermistor assembly)

-327.68 to 327.67°C

Actual ambient temperature displayed

Ambient temp. sensor (thermistor assembly) circuit malfunction

Body Electrical > Air Conditioner > Data List

Tester Display

Ambient Temperature Sensor

OK:

The display is as specified in the normal condition column (0°C (32°F) or higher).

OK

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

NG

GO TO OTHER DIAGNOSIS PROCEDURE (Ambient Temperature Display System)