Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000010YUK
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 - 11/2017]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: PROBLEM SYMPTOMS TABLE; 2017 MY Sienna [08/2016 - 11/2017]

PROBLEM SYMPTOMS TABLE

HINT:

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Entire System

Symptom

Suspected Area

See page

System does not operate at all

(both the blind spot monitor function and rear cross traffic alert function do not operate)

Proceed to "Power Source Circuit"

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

Proceed to "Main Switch Circuit"

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: Main Switch Circuit

Blind spot monitor sensor RH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

System cannot be turned off

Proceed to "Main Switch Circuit"

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: Main Switch Circuit

Blind spot monitor sensor RH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

BSM not available or "Check BSM System" is displayed on the multi-information display

Check abnormality history

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: DIAGNOSIS SYSTEM

Blind spot monitor sensor RH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

Blind spot monitor sensor LH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

Blind Spot Monitor Function

Symptom

Suspected Area

See page

Outer rear view mirror indicator RH does not illuminate

Proceed to "Blind Spot Monitor Beam Axis Confirmation"

2017 MY Sienna [08/2016 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: OPERATION CHECK

Outer rear view mirror RH

2016 - 2020 MY Sienna [12/2015 -        ]; MIRROR (EXT): OUTER REAR VIEW MIRROR GLASS: REMOVAL

Outer rear view mirror assembly RH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; MIRROR (EXT): OUTER REAR VIEW MIRROR: REMOVAL

Outer mirror control ECU assembly RH*1

2016 - 2020 MY Sienna [12/2015 -        ]; MIRROR (EXT): OUTER MIRROR CONTROL ECU: REMOVAL

Blind spot monitor sensor RH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

Outer rear view mirror indicator LH does not illuminate

Proceed to "Blind Spot Monitor Beam Axis Confirmation"

2017 MY Sienna [08/2016 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: OPERATION CHECK

Outer rear view mirror LH

2016 - 2020 MY Sienna [12/2015 -        ]; MIRROR (EXT): OUTER REAR VIEW MIRROR GLASS: REMOVAL

Outer rear view mirror assembly LH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; MIRROR (EXT): OUTER REAR VIEW MIRROR: REMOVAL

Outer mirror control ECU assembly LH*1

2016 - 2020 MY Sienna [12/2015 -        ]; MIRROR (EXT): OUTER MIRROR CONTROL ECU: REMOVAL

Blind spot monitor sensor LH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

Outer rear view mirror indicator RH remains illuminated

Proceed to "Blind Spot Monitor Beam Axis Confirmation"

2017 MY Sienna [08/2016 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: OPERATION CHECK

Blind spot monitor sensor RH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

Outer rear view mirror indicator LH remains illuminated

Proceed to "Blind Spot Monitor Beam Axis Confirmation"

2017 MY Sienna [08/2016 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: OPERATION CHECK

Blind spot monitor sensor LH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

Outer rear view mirror indicator RH does not flash

Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) section

2017 MY Sienna [08/2016 - 11/2017]; LIGHTING (EXT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE

Blind spot monitor sensor RH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

Outer rear view mirror indicator LH does not flash

Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) section

2017 MY Sienna [08/2016 - 11/2017]; LIGHTING (EXT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE

Blind spot monitor sensor LH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

Outer rear view mirror indicator RH continues to flash

Blind spot monitor sensor RH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

Outer rear view mirror indicator LH continues to flash

Blind spot monitor sensor LH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

  • *1: w/ Seat Position Memory System

Rear Cross Traffic Alert Function

Symptom

Suspected Area

See page

Function does not operate at all

(the blind spot monitor function operates normally)

Data list / active test (Reverse)

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: DATA LIST / ACTIVE TEST

Automatic transaxle system (for UA80E)

2017 - 2020 MY Sienna [08/2016 -        ]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

Automatic transaxle system (for UA80F)

2017 - 2020 MY Sienna [08/2016 -        ]; UA80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

Blind spot monitor sensor LH

2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL