NO.6 DSC*2 OPERATES FREQUENTLY/DSC DOES NOT WORK CORRECTLY *2: TCS/DSC INDICATOR LIGHT GOES ON AND OFF WHILE DSC OPERATES [ELECTRONICALLY CONTROLLED BRAKE SYSTEM]

NO.6 DSC^*2 OPERATES FREQUENTLY/DSC DOES NOT WORK CORRECTLY ^*2: TCS/DSC INDICATOR LIGHT GOES ON AND OFF WHILE DSC OPERATES [ELECTRONICALLY CONTROLLED BRAKE SYSTEM]

id040309896100

Troubleshooting item

DSC^*2 operates frequently

DSC does not work correctly

^*2: TCS/DSC indicator light goes on and off while DSC operates

Possible cause

•  Electronically controlled brake unit detected malfunction. (Input and output device malfunction)

•  There is a difference in size or air pressure between front or rear tires.

•  Poor installation with SAS control module (yaw rate sensor, low-G sensor) (If SAS control module is poorly installed, DSC may operate intermittently.)

•  When replacing DSC HU/CM initialization is not performed. (If initialization is not performed correctly, DSC may not work correctly.)

•  Incorrect ABS wheel speed sensor is inputted to electronically controlled brake unit.

Troubleshooting item	DSC^2 operates frequently DSC does not work correctly ^2: TCS/DSC indicator light goes on and off while DSC operates
Possible cause	• Electronically controlled brake unit detected malfunction. (Input and output device malfunction) • There is a difference in size or air pressure between front or rear tires. • Poor installation with SAS control module (yaw rate sensor, low-G sensor) (If SAS control module is poorly installed, DSC may operate intermittently.) • When replacing DSC HU/CM initialization is not performed. (If initialization is not performed correctly, DSC may not work correctly.) • Incorrect ABS wheel speed sensor is inputted to electronically controlled brake unit.

Diagnostic procedure

Step	Inspection	Results	Action
1	CONFIRM ELECTRONICALLY CONTROLLED BRAKE UNIT DTC • Retrieve the electronically controlled brake unit DTC using the M-MDS. (See DTC INSPECTION.) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [ELECTRONICALLY CONTROLLED BRAKE UNIT].)
1		No	Go to the next step.
2	VERIFY THAT SAS CONTROL MODULE IS INSTALLED • Verify that each sensor is installed. • Is SAS control module (yaw rate sensor, low-G sensor) securely installed?	Yes	Go to the next step.
2		No	Install the malfunctioning sensor securely, and perform the repair completion verification.
3	VERIFY THAT BRAKE FLUID PRESSURE SENSOR IS INITIALIZED • Verify that each sensor is initialized. • Has the initialization for the electronically controlled brake unit been performed after replacing the electronically controlled brake unit and the SAS control module?	Yes	Go to the next step.
3		No	Perform the initialization procedure, and perform the repair completion verification. (See DSC RELATED PARTS SENSOR INITIALIZATION PROCEDURE [(E)].)
4	INSPECT TIRE SIZE AND AIR PRESSURE • Inspect tire size and air pressure. • Tire size and air pressure as specified? (See WHEEL AND TIRE SPECIFICATION [(E)].)	Yes	Go to the next step.
4		No	Replace with specified tires and adjust tire air pressure, and perform the repair completion verification. (See TIRE PRESSURE ADJUSTMENT [(E)].)
5	INSPECT ABS WHEEL-SPEED SENSOR • Inspect for each ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR INSPECTION.) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION [2WD].) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION [AWD].) • Is the ABS wheel-speed sensor normal?	Yes	Found malfunctioning part according to the “INTERMITTENT CONCERN TROUBLESHOOTING”. (See PRECAUTION [ELECTRONICALLY CONTROLLED BRAKE SYSTEM].)
5		No	ABS wheel-speed sensor installation inspection: • Inspect the ABS wheel-speed sensor for looseness and confirm it is securely adhered. ABS sensor rotor installation inspection: • Inspect the ABS sensor rotor for poor installation. Repair or replace any malfunctioning parts according to the inspection result. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.) (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.) Perform the repair completion verification.
Repair completion verification	VERIFY THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR • Install/connect the part removed/disconnected during the troubleshooting procedure. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. Explain to the customer what has been repaired.
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 [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1.