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Home >> Mazda >> 2021 >> 3 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Symptom Troubleshooting - Smart Brake Support (Rear) (SBS-R) >> Smart Brake Support (Rear) (SBS-R) Does Not Operate >> Diagnostic Procedure

Diagnostic Procedure

SMART BRAKE SUPPORT (REAR) (SBS-R) DOES NOT OPERATE 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 AND REAR MOUNT CAMERA 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 Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
(See FRONT ULTRASONIC SENSOR REMOVAL/INSTALLATION .)
(See REAR ULTRASONIC SENSOR REMOVAL/INSTALLATION .)
4 INSPECT REAR MOUNT CAMERA FOR MALFUNCTION Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
(See REAR MOUNT CAMERA REMOVAL/INSTALLATION .)
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 (US) .)
If the CAN communication is normal, perform the diagnosis from Step 1.