SMART BRAKE SUPPORT (SBS) [REAR CROSSING] DOES NOT OPERATE [SMART BRAKE SUPPORT (SBS) [REAR CROSSING]]

id1503e2055600

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) [REAR CROSSING]] operation in the service highlights/technical guide.

Outline

Description	•  The brake does not operate when the brake should be operated.
Possible cause	•  Function temporarily disabled •  Poor installation, damage, deformity, or looseness of rear side radar sensor bracket, rear bumper (including moderate impacts) •  Rear ultrasonic sensor malfunction •  Rear side radar sensor aiming not completed •  Rear side radar sensor malfunction •  PCM malfunction •  TCM malfunction •  Electronically controlled brake unit malfunction •  BCM 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 OPERATION RECORD •  Verify the operation record for the time period when the malfunction occurred. (See VEHICLE CONTROL MODULE (VCM) OPERATION RECORD.) •  Is the operation record to disable the applicable function displayed?	Yes	The system is normal. (Explain to the customer that the system was temporarily restricted.)
		No	Go to the next step.
3	VERIFY REAR SIDE RADAR SENSOR INSTALLATION CONDITION •  When a malfunction occurred, verify if the vehicle or environment corresponds to any of the following. ―  Poor installation, damage, deformity, or looseness of rear side radar sensor bracket, rear bumper (including moderate impacts) •  Did the vehicle or environment correspond to any of the above conditions?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification.
		No	Go to the next step.
4	INSPECT REAR 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)].)
5	PERFORM REAR SIDE RADAR SENSOR AIMING •  Perform the rear side radar sensor aiming. (See REAR SIDE RADAR SENSOR AIMING.)	—	Go to the next step.
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 rear side radar sensor. (See REAR SIDE RADAR SENSOR REMOVAL/INSTALLATION.)