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NO.4 ABS OR TCS*1 OPERATES FREQUENTLY/TCS DOES NOT WORK CORRECTLY*1: DSC SYSTEM FUNCTION CONTAINS TRACTION CONTROL FUNCTION, DSC INDICATOR LIGHT GOES ON AND OFF WHILE DSC IS OPERATING

BHE040343000W15

4 | ABS or TCS (*1) operates frequently./TCS does not work correctly. (*1): DSC system function contains traction control function; DSC indicator light goes on and off while DSC is operating.
[TROUBLESHOOTING HINTS] • There is a difference in size or air pressure between the front and rear tires • Incorrect ABS wheel-speed signal is input to DSC HU/CM • There is a malfunction in the engine control system (TCS malfunction)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT DTCS IN DSC HU/CM • Inspect the DTC for the DSC ON-BOARD DIAGNOSTIC SYSTEM. • Have DTCs been stored in memory? | Yes | Perform the applicable DTC inspection. (See DTC Table.)
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 PULSE • Inspect output voltage pattern from the ABS wheel-speed sensor. (See Voltage Pattern Inspection.) (See Voltage Pattern Inspection.) • Is the output voltage pattern normal? | Yes | Find that malfunctioning part according to "INTERMITTENT CONCERN TROUBLESHOOTING".
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.)