Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VKHL
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: LIGHTING (EXT): LIGHTING SYSTEM: Hazard Warning Switch Circuit; 2016 - 2020 MY Sienna [12/2015 -        ]

Hazard Warning Switch Circuit

DESCRIPTION

The combination meter assembly receives the hazard warning signal switch assembly signal and controls the operation of the hazard warning lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

READ VALUE USING TECHSTREAM (HAZARD FLASHER SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) According to the display on the Techstream, read the Data List.

Combination Meter

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Hazard Flasher Switch

Hazard warning signal switch signal/ON or OFF

ON: Hazard warning signal switch on

OFF: Hazard warning signal switch off

-

OK:

Normal conditions listed above are displayed.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page 2016 MY Sienna [12/2015 - 08/2016]; LIGHTING (EXT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE 2017 MY Sienna [08/2016 - 11/2017]; LIGHTING (EXT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE 2018 - 2020 MY Sienna [11/2017 -        ]; LIGHTING (EXT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE )

NG

2.

INSPECT HAZARD WARNING SIGNAL SWITCH ASSEMBLY

(a) Remove the air conditioning control assembly (hazard switch) (See page 2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (EXT): HAZARD WARNING SWITCH: REMOVAL ).

(b) Inspect the air conditioning control assembly (hazard switch) (See page 2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (EXT): HAZARD WARNING SWITCH: INSPECTION ).

NG

REPLACE AIR CONDITIONING CONTROL ASSEMBLY (HAZARD SWITCH)

OK

3.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY)

(a) Disconnect the combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D146-1 (B) - Body ground

Always

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to Combination Meter Assembly)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY (HAZARD SWITCH) - COMBINATION METER ASSEMBLY AND BODY GROUND)

(a) Disconnect the D69 air conditioning control assembly (hazard switch) connector.

(b) Disconnect the D146 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D69-6 (HAZ) - D146-5 (HAZ)

Always

Below 1 Ω

D69-5 (GND) - Body ground

Always

Below 1 Ω

D69-6 (HAZ) or D146-5 (HAZ) - Body ground

Always

10 kΩ or higher

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page 2016 MY Sienna [12/2015 - 08/2016]; LIGHTING (EXT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE 2017 MY Sienna [08/2016 - 11/2017]; LIGHTING (EXT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE 2018 - 2020 MY Sienna [11/2017 -        ]; LIGHTING (EXT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE )

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR