Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VKHN
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: LIGHTING (EXT): LIGHTING SYSTEM: Parking Brake Switch Circuit; 2016 - 2020 MY Sienna [12/2015 -        ]

Parking Brake Switch Circuit

DESCRIPTION

The main body ECU detects the condition of the parking brake switch.

WIRING DIAGRAM

PROCEDURE

1.

READ VALUE USING TECHSTREAM (PARKING BRAKE SW)

(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 / Main Body / Data List.

(e) Read the display on the Techstream.

Main Body

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Parking Brake SW

Parking brake SW signal/ON or OFF

ON: Parking brake switch on

OFF: Parking brake 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 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) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

1 - Switch body

Shaft pushed in (OFF)

10 kΩ or higher

1 - Switch body

Shaft not pushed in (ON)

Below 1 Ω

NG

REPLACE PARKING BRAKE SWITCH ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 2F instrument panel junction block 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

2F-22 - A3-1

Always

Below 1 Ω

2F-22 or A3-1 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2F-22 - 2I-12 (PKB)

Always

Below 1 Ω

2F-22 or 2I-12 (PKB) - Body ground

Always

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

OK

REPLACE MAIN BODY ECU

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY