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 OPERATES

id040300737800

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 operates.

[TROUBLESHOOTING HINTS]

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

• Incorrect ABS wheel-speed signal is inputted to DSC unit

• There is a malfunction in the engine control system (TCS malfunction)

Diagnostic procedure

STEP

INSPECTION

ACTION

1
CHECK FOR DTCS IN DSC UNIT
• Check the DTC for the DSC ON-BOARD DIAGNOSTIC SYSTEM.
• Have DTCs been recorded in memory?
Yes
Perform inspection using appropriate DTC.
No
Go to next step.
2
CHECK TIRE SIZE AND AIR PRESSURE
• Inspect tire size and air pressure.
• Are size and air pressure as specified?
Yes
Go to next step.
No
Replace with specified tires and adjust tire air pressure.
3
INSPECT ABS WHEEL-SPEED SENSOR OUTPUT PULSE
• Start engine and drive vehicle.
• Inspect output voltage pattern using WDS or equivalent (oscilloscope).
• Is output voltage pattern okay?
Yes
Found malfunctioning part according to "INTERMITTENT CONCERN TROUBLESHOOTING".
No
• ABS wheel-speed sensor installation inspection:
Inspect the sensor for looseness and confirm it is securely adhered.
• 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.)