PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM (for Gasoline Model (w/o Safe Exit Assist Function)): DIAGNOSIS SYSTEM; 2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001D0MZ
Model Year Start: 2019	Model: GR Corolla	Prod Date Range: [06/2018 - 04/2020]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM (for Gasoline Model (w/o Safe Exit Assist Function)): DIAGNOSIS SYSTEM; 2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 04/2020]

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.

Click here

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 a malfunction:
Multi-information display displays "Blind Spot Monitor 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 engine switch on (IG).

(3) Turn the Techstream on.

(4) Turn the blind spot monitor system 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

Body Electrical > Blind Spot Monitor Slave > Utility

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, refer to Problem Symptoms Table.
Click here

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 matter is attached to the bumper Check if any foreign matter is 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
History of High Voltage	History of high supply battery voltage from battery to the blind spot monitor sensor	Power Source Circuit
History of Low Temperature	History of low temperature for the blind spot monitor sensor	Check the outside temperature Check if any foreign matter is attached to the blind spot monitor sensors and their surrounding areas
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 engine switch on (IG).

(3) Turn the Techstream on.

(4) Turn the blind spot monitor system 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

Body Electrical > Blind Spot Monitor Slave > Utility

Tester Display
BSM Slave Abnormal History

(6) Clear the abnormality history.