SMART BRAKE SUPPORT (SBS) [REARWARD DETECTION] OPERATES [SMART BRAKE SUPPORT (SBS) [REARWARD DETECTION]]

id1503e1055300

Note

• Due to environmental effects, the system behavior may differ from the driver’s intentions even though the vehicle has no malfunction. To perform symptom troubleshooting, an understanding of the applicable system from the service highlights/technical guide is required. For details on the control conditions of the system, refer to the [SMART BRAKE SUPPORT (SBS) [REARWARD DETECTION]] operation in the service highlights/technical guide.

Outline

Description

•  The brake operates unintentionally.

Possible cause

•  Scratches or dirt on ultrasonic sensor

•  PCM malfunction

•  Electronically controlled brake unit malfunction

•  Ultrasonic sensor malfunction

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY ALL SYSTEM DTCs

•  Perform the DTC inspection.
(See DTC INSPECTION.)

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

Go to the next step.

2

VERIFY ULTRASONIC SENSOR CONDITION

•  Visually verify the applicable part.

•  Are there any scratches or dirt?

Yes

Repair or replace the malfunctioning location and perform the repair completion verification.

No

Go to the next step.

3

INSPECT ULTRASONIC SENSOR FOR MALFUNCTION

•  Inspect the applicable part.
(See REAR ULTRASONIC SENSOR INSPECTION.)

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See REAR ULTRASONIC SENSOR REMOVAL/INSTALLATION [(E)].)

Repair completion verification

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting. (Explain contents of repair to customer)

No

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.H.D. (E)].)

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].)

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction is not resolved, replace the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

Description	• The brake operates unintentionally.
Possible cause	• Scratches or dirt on ultrasonic sensor • PCM malfunction • Electronically controlled brake unit malfunction • Ultrasonic sensor malfunction

Step	Inspection		Action
1	VERIFY ALL SYSTEM DTCs • Perform the DTC inspection. (See DTC INSPECTION.) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
1		No	Go to the next step.
2	VERIFY ULTRASONIC SENSOR CONDITION • Visually verify the applicable part. • Are there any scratches or dirt?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification.
2		No	Go to the next step.
3	INSPECT ULTRASONIC SENSOR FOR MALFUNCTION • Inspect the applicable part. (See REAR ULTRASONIC SENSOR INSPECTION.) • Is the part normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See REAR ULTRASONIC SENSOR REMOVAL/INSTALLATION [(E)].)
Repair completion verification	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.H.D. (E)].) (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction is not resolved, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)