Description

Error signal received from start stop unit

Detection condition

• BSM control module receives the error signal from the start stop unit for 1 s or more.

Fail-safe function

• Blind spot monitoring (BSM) system is stopped.

Possible cause

• DTCs are stored in the start stop unit.

• Start stop unit malfunction

• BSM control module malfunction

System wiring diagram

Not applicable

Step

Inspection

Action

1

• Retrieve the start stop unit DTCs using the M-MDS.

  (See DTC INSPECTION [START STOP UNIT].)

• Are any DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [START STOP UNIT].)

No

Go to the next step.

2

• Clear the DTC for the BSM control module using the M-MDS.

  (See CLEARING DTC [BLIND SPOT MONITORING (BSM)].)

• Switch the ignition ON (engine off or on) and wait for 1 s or more.

• Retrieve the BSM control module DTCs using the M-MDS.

  (See DTC INSPECTION [BLIND SPOT MONITORING (BSM)].)

• Is the same DTC displayed?

Yes

Replace the start stop unit, then go to the next step.

(See START STOP UNIT REMOVAL/INSTALLATION.)

No

Go to Step 4.

3

• Clear the DTC for the BSM control module using the M-MDS.

  (See CLEARING DTC [BLIND SPOT MONITORING (BSM)].)

• Switch the ignition ON (engine off or on) and wait for 1 s or more.

• Retrieve the BSM control module DTCs using the M-MDS.

  (See DTC INSPECTION [BLIND SPOT MONITORING (BSM)].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the BSM control module.

  (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

4

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [BLIND SPOT MONITORING (BSM)].)

No

DTC troubleshooting completed.