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.
• 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.)