Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001HS39
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [03/2019 - 09/2022]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: ADJUSTMENT; 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]

ADJUSTMENT

PROCEDURE

1. PERFORM BLIND SPOT MONITOR BEAM AXIS CONFIRMATION (for Hatchback)

HINT:

The blind spot monitor beam axis confirmation is performed to confirm whether the sensor beam axis is correct, and to adjust the beam axis by using a reflector.

(a) When performing the blind spot monitor beam axis confirmation, move the vehicle to a place where the space shown in the illustration can be secured.

*A

Left Side of Vehicle

*B

Right Side of Vehicle

*a

Vehicle Center Line

*b

Rear Bumper

*c

Inspection Area

-

-

Standard:

Location

Measurement

a

1 m (3.28 ft.)

b

5 m (16.41 ft.)

c

6 m (19.68 ft.)

NOTICE:

  • Perform this inspection on level ground.
  • Make sure that there are no metal objects around the vehicle or on the ground.
  • Unload the vehicle before beginning the inspection.
  • Confirm that the tire pressure is correct before beginning the inspection.
  • Do not place any objects other than the reflector (such as a large metallic object) in the inspection area or allow people to enter the inspection area (W 6 m [19.68 ft.] x L 6 m [19.68 ft.] x H 4 m [13.12 ft.]) shown in the illustration.

(b) Place the reflector.

(1) Hang a weight with a pointed tip from the center of the rear emblem, and mark the rear center point of the vehicle (point A) on the ground.

*a

String

*b

Weight

*c

Center

-

-

HINT:

Lightly flick the string with your fingers several times to confirm that the string is aligned with mark A.

(2) Hang a weight with a pointed tip from the center of the radiator grille (or front panel) emblem, and mark the front center point of the vehicle (point B) on the ground.

*a

String

*b

Weight

*c

Center

-

-

HINT:

Lightly flick the string with your fingers several times to confirm that the string is aligned with mark B.

(3) Draw a vehicle center line so that it passes through mark A and B (front and rear center points).

*a

Vehicle center line

(4) Enlarge and print out the poster shown in the illustration.

*a

Poster

*b

Edge of Rear Bumper

*c

Line C

*d

Vehicle center line

Standard:

Part

Angle

a

52.9°

(5) Attach the printed poster to the floor with the vehicle center line aligned with point A as shown in the illustration.

*a

Poster

*b

Vehicle Center Line

(6) Align a piece of string with line C and mark point D at a distance of 3322 mm (10.9 ft.) from point A.

*a

Vehicle Front

*b

Vehicle Center Line

*c

String

*d

Poster

(7) Set the reflector at the point D shown in the illustration below.

SST: 09870-60000

09870-60010

SST: 09870-60040

*A

Left Side of Vehicle

*B

Right Side of Vehicle

*a

Vehicle Center Line

*b

Reflector

Standard:

Part

Length

a

3322 mm (10.9 ft.)

NOTICE:

  • Set the reflector so that its center is 724 mm (2.37 ft.) above the ground.

    *a

    SST (reflector)

    *b

    724 mm (2.37 ft.)
  • The center of the triangular pyramid is the reference point for the setting position and angle.

    *a

    Center of Triangular Pyramid
  • Set the reflector as shown in the illustration so that the center of the triangular pyramid faces the blind spot monitor sensor.

(c) Perform the blind spot monitor beam axis display.

(1) Connect the Techstream to the DLC3.

(2) Turn the engine switch on (IG)

(3) Turn the blind spot monitor system on.

(4) Turn the Techstream on.

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

HINT:

The master beam is on the LH side and the slave beam is on the RH side.

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display

BSM Master Beam Axis Display

Body Electrical > Blind Spot Monitor Slave > Utility

Tester Display

BSM Slave Beam Axis Display

(6) Check the results displayed for the BSM beam axis display.

Allowable Range:

Item

Blind Spot Monitor Sensor LH

Blind Spot Monitor Sensor RH

Angle

-3.6 to +3.6°

-3.6 to +3.6°

HINT:

If the displayed results are outside the permissible range, the following are possible causes. Therefore, implement countermeasures, check the blind spot monitor beam axis and perform the procedure again.

Possible Causes

Countermeasure

Incorrect SST (reflector) position

Check the position of SST (reflector) and checking space and perform the procedure again

A metallic object is located in the vicinity of the checking space

Check the position of SST (reflector) and checking space and perform the procedure again

The blind spot monitor sensor installation is abnormal

Check the installation condition of the blind spot monitor sensor

(d) Perform the blind spot monitor beam axis adjustment.

(1) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / BSM Master Beam Axis Adjustment or BSM Slave Beam Axis Adjustment.

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display

BSM Master Beam Axis Adjustment

Body Electrical > Blind Spot Monitor Slave > Utility

Tester Display

BSM Slave Beam Axis Adjustment

HINT:

When values on the axis display are in the allowable range, performing this adjustment compensates for any deviation from the normal value.

2. PERFORM BLIND SPOT MONITOR BEAM AXIS CONFIRMATION (for Sedan)

HINT:

The blind spot monitor beam axis confirmation is performed to confirm whether the sensor beam axis is correct, and to adjust the beam axis by using a reflector.

(a) When performing the blind spot monitor beam axis confirmation, move the vehicle to a place where the space shown in the illustration can be secured.

*A

Left Side of Vehicle

*B

Right Side of Vehicle

*a

Vehicle Center Line

*b

Rear Bumper

*c

Inspection Area

-

-

Standard:

Location

Measurement

a

1 m (3.28 ft.)

b

5 m (16.41 ft.)

c

6 m (19.68 ft.)

NOTICE:

  • Perform this inspection on level ground.
  • Make sure that there are no metal objects around the vehicle or on the ground.
  • Unload the vehicle before beginning the inspection.
  • Confirm that the tire pressure is correct before beginning the inspection.
  • Do not place any objects other than the reflector (such as a large metallic object) in the inspection area or allow people to enter the inspection area (W 6 m [19.68 ft.] x L 6 m [19.68 ft.] x H 4 m [13.12 ft.]) shown in the illustration.

(b) Place the reflector.

(1) Hang a weight with a pointed tip from the center of the rear emblem, and mark the rear center point of the vehicle (point A) on the ground.

*a

String

*b

Weight

*c

Center

-

-

HINT:

Lightly flick the string with your fingers several times to confirm that the string is aligned with mark A.

(2) Hang a weight with a pointed tip from the center of the radiator grille (or front panel) emblem, and mark the front center point of the vehicle (point B) on the ground.

*a

String

*b

Weight

*c

Center

-

-

HINT:

Lightly flick the string with your fingers several times to confirm that the string is aligned with mark B.

(3) Draw a vehicle center line so that it passes through mark A and B (front and rear center points).

*a

Vehicle center line

(4) Enlarge and print out the poster shown in the illustration.

*a

Poster

*b

Edge of Rear Bumper

*c

Line C

*d

Vehicle center line

Standard:

Part

Angle

a

52.3°

(5) Attach the printed poster to the floor with the vehicle center line aligned with point A as shown in the illustration.

*a

Poster

*b

Vehicle Center Line

(6) Align a piece of string with line C and mark point D at a distance of 3332 mm (10.9 ft.) from point A.

*a

Vehicle Front

*b

Vehicle Center Line

*c

String

*d

Poster

(7) Set the reflector at the point D shown in the illustration below.

SST: 09870-60000

09870-60010

SST: 09870-60040

*A

Left Side of Vehicle

*B

Right Side of Vehicle

*a

Vehicle Center Line

*b

Reflector

Standard:

Part

Length

a

3332 mm (10.9 ft.)

NOTICE:

  • for TMC Made:

    *a

    SST (reflector)

    *b

    617 mm (2.02 ft.)
    • Set the reflector so that its center is 617 mm (2.02 ft.) above the ground.
  • for TMMMS Made:

    *a

    SST (reflector)

    *b

    625 mm (2.05 ft.)
    • Set the reflector so that its center is 625 mm (2.05 ft.) above the ground.
  • The center of the triangular pyramid is the reference point for the setting position and angle.

    *a

    Center of Triangular Pyramid
  • Set the reflector as shown in the illustration so that the center of the triangular pyramid faces the blind spot monitor sensor.

(c) Perform the blind spot monitor beam axis display.

(1) Connect the Techstream to the DLC3.

(2) Turn the ignition switch to ON (for Gasoline Model).

(3) Turn the power switch on (IG) (for HV Model).

(4) Turn the blind spot monitor system on.

(5) Turn the Techstream on.

(6) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / BSM Master Beam Axis Display or BSM Slave Beam Axis Display.

HINT:

The master beam is on the LH side and the slave beam is on the RH side.

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display

BSM Master Beam Axis Display

Body Electrical > Blind Spot Monitor Slave > Utility

Tester Display

BSM Slave Beam Axis Display

(7) Check the results displayed for the BSM beam axis display.

Allowable Range:

Item

Blind Spot Monitor Sensor LH

Blind Spot Monitor Sensor RH

Angle

-3.6 to +3.6°

-3.6 to +3.6°

HINT:

If the displayed results are outside the permissible range, the following are possible causes. Therefore, implement countermeasures, check the blind spot monitor beam axis and perform the procedure again.

Possible Causes

Countermeasure

Incorrect SST (reflector) position

Check the position of SST (reflector) and checking space and perform the procedure again

A metallic object is located in the vicinity of the checking space

Check the position of SST (reflector) and checking space and perform the procedure again

The blind spot monitor sensor installation is abnormal

Check the installation condition of the blind spot monitor sensor

(d) Perform the blind spot monitor beam axis adjustment.

(1) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / BSM Master Beam Axis Adjustment or BSM Slave Beam Axis Adjustment.

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display

BSM Master Beam Axis Adjustment

Body Electrical > Blind Spot Monitor Slave > Utility

Tester Display

BSM Slave Beam Axis Adjustment

HINT:

When values on the axis display are in the allowable range, performing this adjustment compensates for any deviation from the normal value.

3. PERFORM BLIND SPOT MONITOR SENSOR INSTALLATION CONDITION INSPECTION

NOTICE:

  • Perform this inspection on level ground.
  • Unload the vehicle before beginning the inspection.
  • Confirm that the tire pressure is correct before beginning the inspection.

HINT:

The blind spot monitor sensor installation condition inspection is performed to confirm whether the sensor is perpendicular to the floor surface (+/-2.2°) by using a digital angle gauge, and that the sensor is 46 to 54° from the line parallel to the vehicle center line.

(a) Remove the rear bumper assembly.

for Hatchback: Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; EXTERIOR PANELS / TRIM: REAR BUMPER (for Hatchback except GR): REMOVAL

for Sedan: Click here 2020 - 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 11/2022]; EXTERIOR PANELS / TRIM: REAR BUMPER (for Sedan): REMOVAL

(b) Place the digital angle gauge on a level (gradient within 1%) and perform zero-point adjustment as shown in the illustration.

*a

(+)

*b

(-)

*c

When Storing Zero Point

*d

After Storing Zero Point, Indicates 90° When Fully Horizontal

(c) Set the digital angle gauge to the outward facing surface of the blind spot monitor sensor as shown in the illustration, and check that the perpendicular angle of the blind spot monitor sensor is within the permissible range.

*1

Blind Spot Monitor Sensor

*a

Digital Angle Gauge

*b

Outward Facing Surface

NOTICE:

The sensor angle is the measured sensor angle subtracted from 90°.

*a

(+)

*b

(-)

*c

Horizontal Line

*d

Digital Angle Gauge

*e

Outward Facing Surface

HINT:

  • The digital angle gauge should indicate 90° when turned on its side.
  • The outward facing surface (installation angle) is positive (+) when it faces higher than horizontal.

Standard:

Item

Allowable Range

Blind Spot Monitor Sensor LH

+2.2 to -2.2°

Blind Spot Monitor Sensor RH

+2.2 to -2.2°

(d) Using the sensor installation stud bolt center lines as a reference, check that the stud bolts are as shown in the illustration.

Standard:

Dimension

Specified Value

a

108 mm (4.25 in.)

y

78 to 87 mm

(3.07 to 3.43 in.)

Degree

Specified Value

A

46 to 54°

HINT:

If the results are not as specified, it is possible that the blind spot monitor sensor installation area (frame, stud bolt) is deformed, so make corrections as necessary.

*A

Vehicle Rear (LH)

*a

Vehicle Front

*b

Vehicle Rear

*c

Vehicle Center Line

*d

Stud Bolt

*e

Stud Bolt Center Line

*f

Line Parallel to Vehicle Center Line