Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000018F8S
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Parking Brake Switch Circuit; 2018 - 2020 MY Sienna [11/2017 -        ]

Parking Brake Switch Circuit

DESCRIPTION

This circuit is from the parking brake switch assembly to the radio and display receiver assembly.

WIRING DIAGRAM

PROCEDURE

1.

CHECK PARKING BRAKE SWITCH ASSEMBLY

(a) Enter the "Vehicle Signal Check Mode" screen. [Refer to Check Vehicle Signal Check Mode in Operation Check (See page 2018 - 2020 MY Sienna [11/2017 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: OPERATION CHECK )]

(b) Check that the display changes between ON and OFF according to the parking brake operation.

HINT:

This display is updated once per second. As a result, it is normal for the display to lag behind the actual parking brake operation.

OK:

Parking Brake Condition

Display

Applied

ON

Released

OFF

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page 2018 MY Sienna [11/2017 - 08/2018]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: PROBLEM SYMPTOMS TABLE 2019 - 2020 MY Sienna [08/2018 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: PROBLEM SYMPTOMS TABLE )

NG

2.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - PARKING BRAKE SWITCH ASSEMBLY)

(a) Disconnect the D196 radio and display receiver assembly connector.

(b) Disconnect the A3 parking brake switch assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D196-20 (PKB) - A3-1

Always

Below 1 Ω

D196-20 (PKB) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT PARKING BRAKE SWITCH ASSEMBLY

(a) Remove the parking brake switch assembly (See page 2016 - 2020 MY Sienna [12/2015 -        ]; PARKING BRAKE: PARKING BRAKE SWITCH: REMOVAL ).

(b) Inspect the parking brake switch assembly (See page 2016 - 2020 MY Sienna [12/2015 -        ]; PARKING BRAKE: PARKING BRAKE SWITCH: INSPECTION ).

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page 2018 MY Sienna [11/2017 - 08/2018]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: PROBLEM SYMPTOMS TABLE 2019 - 2020 MY Sienna [08/2018 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: PROBLEM SYMPTOMS TABLE )

NG

REPLACE PARKING BRAKE SWITCH ASSEMBLY