Diagnostic Procedure

DSC OPERATES FREQUENTLY/DSC DOES NOT WORK CORRECTLY DIAGNOSTIC PROCEDURE

Step

Inspection

Results

Action

VERIFY ELECTRONICALLY CONTROLLED BRAKE UNIT DTCs

Perform the DTC inspection for the electronically controlled brake unit. (See DTC INSPECTION .)
Are any DTCs displayed?

Yes

Repair or replace the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [DSC] .)

Go to the next step.

VERIFY SAS CONTROL MODULE INSTALLATION CONDITION

Verify the SAS control module installation condition.
Is SAS control module (yaw rate sensor, low-G sensor) securely installed?

Yes

Go to the next step.

Install the SAS control module securely and perform the repair completion verification 1.
(Refer to [SAS CONTROL MODULE REMOVAL/INSTALLATION ] ).

VERIFY SENSOR INITIALIZATION PROCEDURE PERFORMANCE CONDITION FOR DSC RELATED PARTS

After replacing the electronically controlled brake unit and the SAS control module, has the sensor initialization procedure for the DSC related parts been performed?

Yes

Go to the next step.

Perform the sensor initialization procedure for the DSC related parts, and perform the repair completion verification 1.
(See DSC RELATED PARTS SENSOR INITIAL SETTING in the appropriate service information(s).)

VERIFY TIRE CONDITION

Verify the tire pressure and specifications of the tire.
Are the tire pressure and specifications of the tire normal? (Refer to [WHEEL AND TIRE SPECIFICATION ] ).

Yes

Go to the next step.

Adjust the tire pressure or replace with a specified tire and perform the repair completion verification 1.

⁽¹⁾5

INSPECT ABS WHEEL-SPEED SENSOR FOR MALFUNCTION

Inspect the applicable parts for the following.
- ABS wheel-speed sensor installation condition
- ABS sensor rotor installation condition (if installed at an angle, it may cause output of abnormal wave pattern at high speeds)
- ABS sensor rotor damage (Refer to [FRONT ABS WHEEL-SPEED SENSOR INSPECTION ] ). (Refer to [REAR ABS WHEEL-SPEED SENSOR INSPECTION ] ).
Is the applicable part normal?

Yes

Refer to [ACTION FOR NON-REPEATABLE MALFUNCTION ] to find the malfunctioning location.

Repair or replace the malfunctioning location and perform the repair completion verification 1.
(Refer to [FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION ] ).
(Refer to [REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION ] ).

Repair completion verification 1

VERIFY IF MALFUNCTION CAUSE IS CORRECTED

Install/connect the part removed/disconnected during the troubleshooting procedure.
Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting.
Explain repair contents to customer.

Refer to the CAN (controller area network) malfunction diagnosis flow to inspect for a CAN communication error.
(See MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] .)
If the CAN communication is normal, perform the diagnosis from Step 1.

⁽¹⁾

When performing an asterisked (*) troubleshooting inspection, first verify the damage and connection status of the connectors and terminals, then perform the inspection while shaking the wiring harness (cause of malfunction may be due to poor connection of connectors, terminals, or wiring harness). If there is a malfunction in the connectors or terminals, securely connect, repair, or perform replacement.