5. Pedal Vibration or ABS Operation Noise
Symptom 5 - Pedal Vibration and Noise1. INSPECTION (1)
Check brake system for pedal vibration or noise at engine start.
Is inspection result OK?
OK >> Perform self-diagnosis.
NG >> GO TO 2.
2. INSPECTION (2)
Check for vibration during soft braking (just placing foot on pedal).
CAUTION: ABS may activate in conditions such as those listed below, when wheel speed changes.
- Gear shifting
- Turning at high speed
- Passing through gusts of wind
Is inspection result OK?
OK >> GO TO 3.
NG >> Normal.
3. INSPECTION (3)
Does vibration occur during normal braking?
CAUTION: In addition to activation for sudden braking, ABS may activate in conditions such as those listed below.
Roads with low friction coefficients
Turning at high speed
Passing through gusts of wind
Is inspection result OK?
OK >> GO TO 4.
NG >> Normal.
4. INSPECTION (4)
Check for vibration when engine speed is increased while vehicle is stopped.
Is inspection result OK?
OK >> GO TO 5.
NG >> Normal.
CAUTION: vibration may occur when vehicle is stopped.
5. INSPECTION (5)
Check for vibration when switches of electrical components are operated.
Is inspection result OK?
OK >> Check for any wireless devices, antennas, or antenna lead near ABS actuator and electric unit (control unit) (including wiring).
NG >> GO TO 6.
6. CHECKING ABS WARNING LAMP INDICATION
Confirm ABS warning lamp turns on.
Is inspection result OK?
OK >> Perform self-diagnosis.
NG >> GO TO 7.
7. CHECKING WHEEL SENSORS
Inspect wheel sensor system.
- Sensor mounting inspection
- Sensor pick-up inspection for iron chips (e.g. Number of teeth, damaged teeth)
- Sensor connector engagement inspection
- Inspection of wheel sensor circuit
Is inspection result OK?
OK >> Normal.
NG >> Repair wheel sensor and rotor system.