Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJAH
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: Power Source Circuit; 2016 - 2020 MY Sienna [12/2015 -        ]

Power Source Circuit

DESCRIPTION

This circuit provides power to operate the blind spot monitor sensors.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH - BATTERY)

(a) Disconnect the blind spot monitor sensor RH connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

q2-5 (BRB) - Body ground

Ignition switch ON

11 to 14 V

q2-5 (BRB) - Body ground

Ignition switch off

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor RH)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH - BODY GROUND)

(a) Disconnect the blind spot monitor sensor RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

q2-10 (BRGD) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor RH)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - BATTERY)

(a) Disconnect the blind spot monitor sensor LH connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

q3-5 (BLB) - Body ground

Ignition switch ON

11 to 14 V

q3-5 (BLB) - Body ground

Ignition switch off

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor RH)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - BODY GROUND)

(a) Disconnect the blind spot monitor sensor LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

q3-10 (BLGD) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Blind Spot Monitor Sensor RH)

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page 2016 MY Sienna [12/2015 - 08/2016]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: PROBLEM SYMPTOMS TABLE 2017 MY Sienna [08/2016 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: PROBLEM SYMPTOMS TABLE 2018 - 2020 MY Sienna [11/2017 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: PROBLEM SYMPTOMS TABLE )

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR