Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJAK
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: DIAGNOSIS SYSTEM; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

DIAGNOSIS SYSTEM

1. DESCRIPTION

(a) Blind spot monitor data and the Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and to repair it.

2. CHECK DLC3

(a) Check the DLC3 (See page 2016 - 2020 MY Sienna [12/2015 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: GENERAL INFORMATION ).

3. DIAGNOSIS FUNCTION

(a) The blind spot monitor system displays an error message on the multi-information display to inform the driver that the system is unavailable either temporarily or due to a malfunction.

  • When the system is unavailable temporarily:

    Multi-information display displays "BSM not available".

  • When the system is unavailable due to a malfunction:

    Multi-information display displays "Check BSM System".

4. ABNORMALITY HISTORY

HINT:

The abnormality history for a blind spot monitor sensor can be displayed or cleared.

(a) Check abnormality history

(1) Connect the Techstream to the DLC3.

(2) Turn the ignition switch to ON.

(3) Turn the Techstream on.

(4) Turn the blind spot monitor main switch (warning canceling switch assembly) on.

(5) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / BSM Master Abnormal History or BSM Slave Abnormal History.

(6) Check the results displayed for the abnormality history check.

HINT:

  • If "Yes" is displayed, check the suspected area column for each item.
  • Abnormality history is stored only for the blind spot monitor sensor for which an abnormality has been detected.
  • If "No" is displayed, proceed to the next suspected area shown in the 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 ).

Abnormality History Table

Tester Display

Item Explanation

Suspected Area

History of Module Blockage

History of blind spot monitor sensor detection problems due to snow, rain etc. on the bumper
  • Check if a bumper compatible with the blind spot monitor (such as an original equipment bumper) is installed
  • Check if any foreign objects are attached to the bumper
  • Check if any foreign objects are present between the bumper and sensors

History of Low Voltage

History of low supply battery voltage from battery to the blind spot monitor sensor

Power Source Circuit (See page 2016 - 2020 MY Sienna [12/2015 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: Power Source Circuit )

History of High Voltage

History of high supply battery voltage from battery to the blind spot monitor sensor

History of Low Temperature

History of low temperature for the blind spot monitor sensor

Check the outside temperature

History of High Temperature

History of high temperature for the blind spot monitor sensor

(b) Clearing abnormality history

(1) Connect the Techstream to the DLC3.

(2) Turn the ignition switch to ON.

(3) Turn the Techstream on.

(4) Turn the blind spot monitor main switch (warning canceling switch assembly) on.

(5) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / BSM Master Abnormal History or BSM Slave Abnormal History

(6) Clear the BSM Master Abnormal History and/or BSM Slave Abnormal History.