- Check if a bumper compatible with the blind spot monitor (such as an original equipment bumper) is installed
- Check if any foreign matter is attached to the bumper
- Check if any foreign matter is present between the bumper and sensors
Lexus NX: Diagnosis System
Lexus NX Service Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Blind Spot Monitor System / Diagnosis System
DIAGNOSIS SYSTEM
DESCRIPTION
(a) Blind spot monitor data and 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 perform repairs.
CHECK DLC3
(a) Check the DLC3.
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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 "Blind Spot Monitor Unavailable".
-
When the system is unavailable due to malfunction:
Multi-information display displays "Blind Spot Monitor System Malfunction Visit Your Dealer".
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 power switch on (IG).
(3) Turn the Techstream on.
(4) Turn the blind spot monitor main switch (combination 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
Body Electrical > Blind Spot Monitor Master > Utility| Tester Display |
|---|
| BSM Master Abnormal History |
| Tester Display |
|---|
| 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 Problem Symptoms Table.
Click here
| 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 | |
| History of Low Voltage | History of low supply battery voltage from battery to the blind spot monitor sensor | Power Source Circuit Click here |
| 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 power switch on (IG).
(3) Turn the Techstream on.
(4) Turn the blind spot monitor main switch (combination 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
Body Electrical > Blind Spot Monitor Master > Utility| Tester Display |
|---|
| BSM Master Abnormal History |
| Tester Display |
|---|
| BSM Slave Abnormal History |
(6) Clear the BSM Master Abnormal History and/or BSM Slave Abnormal History.
READ NEXT:
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the blind spot monitor main switch (combination switch assembly) on. (d) Turn the Techst
Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA (a) Whenever a DTC is detected, the blind spot monitor sensor stores the current vehicle (sensor) state as Freeze Frame Data. CHECK FREEZE FRAME DATA (a) Connect th
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a pa
SEE MORE:
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Room Temperature Sensor Circuit (B1411)
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