Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001AO1E
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 -           ]
Title: LIGHTING (EXT): LIGHTING SYSTEM (for HV Model without Cornering Light): Hazard Warning Switch Circuit; 2019 - 2022 MY Avalon HV [04/2018 -        ]

Hazard Warning Switch Circuit

DESCRIPTION

The combination meter assembly receives the hazard warning signal switch (radio and display receiver assembly) on signal and controls the operation of the hazard warning lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

1.

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 / Combination Meter / Data List.

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

Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Hazard Flasher Switch

Hazard warning signal switch signal

OFF or ON

OFF: Hazard warning signal switch off

ON: Hazard warning signal switch on

-

Body Electrical > Combination Meter > Data List

Tester Display

Hazard Flasher Switch

OK:

Normal conditions listed above are displayed.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; LIGHTING (EXT): LIGHTING SYSTEM (for HV Model without Cornering Light): PROBLEM SYMPTOMS TABLE 2021 MY Avalon HV [08/2020 - 08/2021]; LIGHTING (EXT): LIGHTING SYSTEM (for HV Model without Cornering Light): PROBLEM SYMPTOMS TABLE 2022 MY Avalon HV [08/2021 -        ]; LIGHTING (EXT): LIGHTING SYSTEM (for HV Model without Cornering Light): PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT HAZARD WARNING SIGNAL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Remove the hazard warning signal switch (radio and display receiver assembly).

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; LIGHTING (EXT): HAZARD WARNING SWITCH: REMOVAL

(b) Inspect the hazard warning signal switch (radio and display receiver assembly).

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; LIGHTING (EXT): HAZARD WARNING SWITCH: INSPECTION

NG

REPLACE HAZARD WARNING SIGNAL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY)

OK

3.

CHECK HARNESS AND CONNECTOR (HAZARD WARNING SIGNAL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY) - COMBINATION METER ASSEMBLY AND BODY GROUND)

(a) Disconnect the G15 combination meter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G20-7 (TB) - G15-3 (HAZ)

Always

Below 1 Ω

G20-7 (TB) or G15-3 (HAZ) - Body ground

Always

10 kΩ or higher

G20-6 (GND) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR