id040300803400
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4
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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.
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[TROUBLESHOOTING HINTS]
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There is a difference in size or air pressure between the front and rear tires
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Incorrect ABS wheel-speed signal is input to DSC HU/CM
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There is a malfunction in the engine control system (TCS malfunction)
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Tire problem (low or high air pressure, excessive wear, different grip level by four wheels)
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Diagnostic procedure
| STEP |
INSPECTION |
ACTION |
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|---|---|---|---|
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1
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INSPECT DTCS IN DSC HU/CM
• Inspect the DTC for the DSC ON-BOARD DIAGNOSTIC SYSTEM.
• Have DTCs been stored in memory?
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Yes
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Perform the applicable DTC inspection.
(See
ON-BOARD DIAGNOSIS.)
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No
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Go to the next step.
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2
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INSPECT TIRE SIZE AND AIR PRESSURE
• Inspect the tire size and the air pressure.
• Are size and air pressure as specified?
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Yes
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Go to the next step.
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No
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Replace with specified tires and adjust tire air pressure.
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3
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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?
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Yes
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Go to the next step.
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No
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• 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.)
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4
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VERIFY THAT TIRE CONDITION
• Verify tire condition for following:
• Are tires condition okay?
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Yes
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Find malfunctioning part according to "INTERMITTENT CONCERN TROUBLESHOOTING".
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No
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Adjust, repair or replace tire.
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