LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2016 >> IS 300 Base >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Blind Spot Monitor System - Diagnostics - Introduction >> Blind Spot Monitor System >> Problem Symptoms Table [10/2017 - 09/2020] >> Problem Symptoms Table [10/2017 - 09/2020]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Problem Symptoms Table [10/2017 - 09/2020]

HINT: 

ENTIRE SYSTEM

Symptom Suspected Area Link
System does not operate at all Proceed to "Power Source Circuit" Refer to Power Source Circuit [10/2016 - 09/2020]
Proceed to "Main Switch Circuit" Refer to Main Switch Circuit [04/2013 - 09/2020]
Blind spot monitor sensor LH Refer to REMOVAL [10/2016 - ]
System cannot be turned off Proceed to "Main Switch Circuit" Refer to Main Switch Circuit [04/2013 - 09/2020]
Blind spot monitor sensor LH Refer to REMOVAL [10/2016 - ]
"BSM not available" or "Check BSM System" is displayed on the multi-information display Check abnormality history Refer to DIAGNOSIS SYSTEM [10/2016 - 09/2020] 
Blind spot monitor sensor RH Refer to REMOVAL [10/2016 - ]
Blind spot monitor sensor LH Refer to REMOVAL [10/2016 - ]
Combination meter assembly Refer to REMOVAL [10/2016 - 09/2020]
BLIND SPOT MONITOR FUNCTION

Symptom Suspected Area Link
Outer rear view mirror indicator RH does not illuminate Proceed to "Blind Spot Monitor Beam Axis Confirmation" Refer to OPERATION CHECK [10/2016 - 09/2020] 
Outer mirror RH Refer to REMOVAL [04/2013 - 09/2020]
Outer mirror control ECU assembly RH*1 Refer to REMOVAL [04/2013 - ]
Outer rear view mirror assembly RH Refer to REMOVAL [10/2016 - 09/2020]
Blind spot monitor sensor RH Refer to REMOVAL [10/2016 - ]
Outer rear view mirror indicator LH does not illuminate Proceed to "Blind Spot Monitor Beam Axis Confirmation" Refer to OPERATION CHECK [10/2016 - 09/2020] 
Outer mirror LH Refer to REMOVAL [04/2013 - 09/2020]
Outer mirror control ECU assembly LH*1 Refer to REMOVAL [04/2013 - ]
Outer rear view mirror assembly LH Refer to REMOVAL [10/2016 - 09/2020]
Blind spot monitor sensor LH Refer to REMOVAL [10/2016 - ]
Outer rear view mirror indicator RH remains illuminated Proceed to "Blind Spot Monitor Beam Axis Confirmation" Refer to OPERATION CHECK [10/2016 - 09/2020] 
Blind spot monitor sensor RH Refer to REMOVAL [10/2016 - ]
Outer rear view mirror indicator LH remains illuminated Proceed to "Blind Spot Monitor Beam Axis Confirmation" Refer to OPERATION CHECK [10/2016 - 09/2020] 
Blind spot monitor sensor LH Refer to REMOVAL [10/2016 - ]
Outer rear view mirror indicator RH does not flash Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) service information*2 Refer to PROBLEM SYMPTOMS TABLE [10/2016 - 09/2020]
Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) service information*3 Refer to PROBLEM SYMPTOMS TABLE [10/2016 - 09/2018] , or refer to PROBLEM SYMPTOMS TABLE [09/2018 - 09/2020]
Blind spot monitor sensor RH Refer to REMOVAL [10/2016 - ]
Outer rear view mirror indicator LH does not flash Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) service information*2 Refer to PROBLEM SYMPTOMS TABLE [10/2016 - 09/2020]
Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) service information*3 Refer to PROBLEM SYMPTOMS TABLE [10/2016 - 09/2018] , or refer to PROBLEM SYMPTOMS TABLE [09/2018 - 09/2020]
Blind spot monitor sensor LH Refer to REMOVAL [10/2016 - ]
Outer rear view mirror indicator RH continues to flash Blind spot monitor sensor RH Refer to REMOVAL [10/2016 - ]
Outer rear view mirror indicator LH continues to flash Blind spot monitor sensor LH Refer to REMOVAL [10/2016 - ]
REAR CROSS TRAFFIC ALERT FUNCTION

Symptom Suspected Area Link
Function does not operate at all
(Blind spot monitor function operates normally)
Data list / active test (Reverse) Refer to DATA LIST / ACTIVE TEST [10/2016 - 09/2020] 
Automatic transmission system (for 8AR-FTS) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - ]
Automatic transmission system (for 2GR-FKS) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - ]
Blind spot monitor sensor RH Refer to REMOVAL [10/2016 - ]
While RCTA function is active, outer rear view mirror indicator flashes but RCTA buzzer does not sound. Proceed to "Buzzer does not Sound" Refer to Buzzer does not Sound [10/2016 - 09/2020]
When shift lever is in R, detection operation is normal but RCTA indicator does not appear on multi-display assembly CAN communication system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2016 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ]
Rear television camera assembly*4 Refer to REMOVAL [10/2016 - ]
Radio receiver assembly*5 Refer to REMOVAL [04/2013 - 09/2020]
Blind spot monitor sensor LH Refer to REMOVAL [10/2016 - ]
Blind spot monitor sensor RH Refer to REMOVAL [10/2016 - ]
Multi-display assembly Refer to REMOVAL [10/2016 - 09/2020]
  1. *1: w/ Seat Memory
  2. *2: w/ AFS
  3. *3: w/o AFS
  4. *4: for 7 Inch Display w/ Parking Assist Monitor System (w/ Parallel Parking Assist Function)
  5. *5: for 10.3 Inch Display