NO.4 ABS OR TCS OPERATES FREQUENTLY/TCS DOES NOT WORK CORRECTLY [DSC/RSC]

id0403b3815700

4 | ABS or TCS * operates frequently./TCS* does not work correctly. *: DSC/RSC system function contains traction control function; DSC indicator light goes on and off while DSC/RSC is operating.
Possible cause | • There is a difference in size or air pressure between the front and rear tires • Incorrect ABS wheel-speed signal is input to DSC/RSC HU/CM • There is a malfunction in the engine control system (TCS malfunction) • Tire problem (low or high air pressure, excessive wear, different grip level by four wheels)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT DTCS IN DSC/RSC HU/CM • Inspect the DTC for the ON-BOARD DIAGNOSTIC SYSTEM. • Have DTCs been stored in memory? | Yes | Perform the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DSC/RSC].)
No | Go to the next step.
2 | INSPECT TIRE SIZE AND AIR PRESSURE • Inspect the tire size and the air pressure. • Are size and air pressure as specified? | Yes | Go to the next step.
No | Replace with specified tires and adjust tire air pressure.
3 | INSPECT ABS WHEEL-SPEED SENSOR OUTPUT VALUE • Inspect the output value from the 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 [4WD].) • Is the output value normal? | Yes | Go to the next step.
No | • ABS wheel-speed sensor installation inspection: Inspect the sensor for looseness and verify that it is securely installed. • Sensor rotor installation inspection: Inspect the sensor rotor for poor installation and chipping of sensor rotor teeth. (If sensor rotor is installed poorly, it may cause output of abnormal wave form at high speed.)
4 | VERIFY THAT TIRE CONDITION • Verify tire condition for following: ― Wear ― Grip level (different by four wheels) • Are tires condition okay? | Yes | Find malfunctioning part according to “INTERMITTENT CONCERN TROUBLESHOOTING”.
No | Adjust, repair or replace tire.