Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001EZN9
Model Year Start: 2019 Model: Camry HV Prod Date Range: [09/2018 - 10/2020]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: A/C Switch Indicator does not Turn On; 2019 - 2020 MY Camry HV [09/2018 - 10/2020]

A/C Switch Indicator does not Turn On

DESCRIPTION

If none of the switch indicators on the air conditioning control panel (radio and display receiver assembly)*1 or air conditioning control assembly*2 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 panel (radio and display receiver assembly) malfunction*1
  • Air conditioning control assembly malfunction*2
  • 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)
  • *1: for 8 Inch Display
  • *2: for 7 Inch Display

PROCEDURE

1.

CONFIRM MODEL

Result

Proceed to

for 8 Inch Display

A

for 7 Inch Display

B
B

GO TO STEP 3

A

2.

CHECK AIR CONDITIONING CONTROL PANEL (RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Check that the switch indicators on the air conditioning control panel (radio and display receiver assembly) illuminate immediately after the engine is started.

OK:

All switch indicators illuminate.

OK

GO TO STEP 4

NG

REPLACE AIR CONDITIONING CONTROL PANEL (RADIO AND DISPLAY RECEIVER ASSEMBLY)

3.

CHECK AIR CONDITIONING CONTROL ASSEMBLY

(a) Check that the switch indicators on the air conditioning control assembly illuminate immediately after the engine is started.

OK:

All switch indicators illuminate.

NG

REPLACE AIR CONDITIONING CONTROL ASSEMBLY

OK

4.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Air Conditioner > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Ambient Temp Sensor

Thermistor assembly

Min.: -23.30°C (-9.94°F)

Max.: 65.95°C (150.71°F)

Actual ambient temperature displayed

Thermistor assembly circuit malfunction

  • When open circuit: -23.30°C (-9.94°F)
  • When short circuit: 65.95°C (150.71°F)

Body Electrical > Air Conditioner > Data List

Tester Display

Ambient Temp Sensor

OK:

The value displayed is 0°C (32°F) or higher.

OK

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

for HFC-134a (R134a): Click here 2019 - 2020 MY Camry HV [09/2018 - 10/2020]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFC-134a(R134a)): ON-VEHICLE INSPECTION

for HFO-1234yf (R1234yf): Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HEATING / AIR CONDITIONING: REFRIGERANT(for HFO-1234yf(R1234yf)): ON-VEHICLE INSPECTION

NG

GO TO OTHER DIAGNOSIS PROCEDURE (Ambient Temperature Display System)