Description

Error signal received from start stop unit

Detection condition

• Forward sensing camera (FSC) receives the error signal from the start stop unit for 5 s or more.

Fail-safe

• Inhibits the lane departure warning system (LDWS).

• Inhibits the high beam control (HBC) system.

Possible cause

• DTCs are stored in the start stop unit.

• Start stop unit malfunction

• Forward sensing camera (FSC) 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 forward sensing camera (FSC) using the M-MDS.

  (See CLEARING DTC [FORWARD SENSING CAMERA (FSC)].)

• Switch the ignition ON (engine off or on) and wait for 6.5 s or more.

• Retrieve the forward sensing camera (FSC) DTCs using the M-MDS.

  (See DTC INSPECTION [FORWARD SENSING CAMERA (FSC)].)

• Is the same DTC displayed?

Yes

Replace the forward sensing camera (FSC), then go to the next step.

(See FORWARD SENSING CAMERA (FSC) REMOVAL/INSTALLATION.)

No

Go to the next step.

3

• Are any other DTCs displayed?

Yes

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

(See DTC TABLE [FORWARD SENSING CAMERA (FSC)].)

No

DTC troubleshooting completed.