Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJAI
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: Main Switch Circuit; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

Main Switch Circuit

DESCRIPTION

When the blind spot monitor main switch (warning canceling switch assembly) is turned on, a signal is sent to the blind spot monitor sensor LH and the blind spot monitor indicator on the blind spot monitor main switch (warning canceling switch assembly) illuminates. The blind spot monitor system operates according to this signal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

CHECK BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY)

(a) Check that the blind spot monitor indicator on the blind spot monitor main switch (warning canceling switch assembly) illuminates normally when the blind spot monitor main switch (warning canceling switch assembly) is turned from off to on.

(b) Check that the blind spot monitor indicator on the blind spot monitor main switch (warning canceling switch assembly) turns off normally when the blind spot monitor main switch (warning canceling switch assembly) is turned from on to off.

OK:

The blind spot monitor indicator operates normally.

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 )

NG

2.

READ VALUE USING TECHSTREAM (MAIN 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 / Blind spot monitor Master / Data list.

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

Blind Spot Monitor Master

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Main Switch

Blind spot monitor main switch (warning canceling switch assembly) / OFF or ON

ON: Blind spot monitor main switch (warning canceling switch assembly) on

OFF: Blind spot monitor main switch (warning canceling switch assembly) off

-

Result

Result

Proceed to

The display does not change as shown above when the blind spot monitor main switch (warning canceling switch assembly) is operated.

A

The display changes as shown above when the blind spot monitor main switch (warning canceling switch assembly) is operated.

B

B

GO TO STEP 6

A

3.

INSPECT BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY)

(a) Inspect the blind spot monitor main switch (warning canceling switch assembly) (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR MAIN SWITCH: INSPECTION ).

NG

REPLACE BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY)

OK

4.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY) - BATTERY)

(a) Disconnect the blind spot monitor main switch (warning canceling switch assembly) connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

D139-11 (B) - Body ground

Ignition switch ON

11 to 14 V

D139-11 (B) - Body ground

Ignition switch off

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Blind Spot Monitor Main Switch (Warning Canceling Switch Assembly))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY - BLIND SPOT MONITOR SENSOR RH)

(a) Disconnect the q2 blind spot monitor sensor RH connector.

(b) Disconnect the D139 blind spot monitor main switch (warning canceling switch assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

q2-8 (BSSW) - D139-8 (D)

Always

Below 1 Ω

q2-8 (BSSW) - Body ground

Always

10 kΩ or higher

OK

REPLACE BLIND SPOT MONITOR SENSOR RH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

INSPECT BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY)

(a) Inspect the blind spot monitor main switch (warning canceling switch assembly) (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR MAIN SWITCH: INSPECTION ).

HINT:

Check the blind spot monitor indicator.

NG

REPLACE BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY)

OK

7.

CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY - BLIND SPOT MONITOR SENSOR RH)

(a) Disconnect the q2 blind spot monitor sensor RH connector.

(b) Disconnect the D139 blind spot monitor main switch (warning canceling switch assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

q2-3 (BIND) - D139-12 (E)

Always

Below 1 Ω

q2-3 (BIND) - Body ground

Always

10 kΩ or higher

OK

REPLACE BLIND SPOT MONITOR SENSOR RH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR