Anti-lock brake system (ABS control unit)
P-35
1. Remove the trim plate of rear trunk.
2. Remove as per the order as shown in the Table.
3. Install in the reversing order of removal.
1 Harness joint of rear sensor
2 Locking bolt
3 Locking bolt
4 Locking bolt
5 Locking bolt
6 Harness of rear wheel sensor
Check of Front/rear ABS control unit wheel
speed sensor
Visual inspection
1. Remove the wheels and tires to check whether
the wheel speed sensor is loose or damaged.
Replace them when necessary.
Inspection of air gap
1. Check the clearance between the wheel speed
sensor and sensor.
Clearance: 0.2 --1.3 mm {0.007 --0.051 in}.
Inspection of resistance value
1. Disconnect the wheel speed sensor joint of ABS
control unit.
2. Check the resistance of wheel speed sensor of
ABS control unit
If the resistance value doesn’t meet the
requirements, replace the wheel speed sensor.
Resistance value: 75 KΩ±1%
Inspection of current
1. Jack up the vehicle on a level ground by use of a jack, shore up the vehicle on a safety seat,
2. Disconnect the wheel speed sensor joint of ABS control unit.
3. Turn every wheel at the speed by one turn per second and check each sensor. If the voltage value doesn’t
meet the requirements, replace the wheel speed sensor of ABS control unit.
Current value: 7.15—14.3 mA
Inspection of voltage waveform
1. Jack up the vehicle on a level ground by use of a jack, shore up with a safety bracket.
2. Disconnect the wheel speed sensor joint of ABS control unit.
3. Turn every wheel and check with an oscilloscope, whether the voltage of waveform is deformed of has
any noise. If there is any deformation or noise, check the rotor of ABS control unit sensor.
ABS wheel sensor
Clearance
Gear rim of ABS sensor
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