Front And Rear Wheel Speed Sensor On-Vehicle Inspection - Suzuki Grand Vitara 2011 Manual

4E-40 ABS:
Front and Rear Wheel Speed Sensor On-Vehicle
Inspection
Output Voltage Inspection
1) Disconnect negative (–) cable from battery.
2) Hoist vehicle a little.
3) Disconnect wheel speed sensor connector.
4) Disconnect wheel speed grommet from vehicle body.
5) Set up measuring devices as shown in figure, the
resistance to 115 Ω and the power supply voltage to
12 V.
CAUTION
!
Incorrect voltage and/or wrong connection
cause damage to wheel speed sensor.
V
5
1. Wheel speed sensor connector
2. Resistance (115 Ω)
3. "WHT" wire terminal
6) Measure voltage at resistance without wheel
rotation.
If voltage is out of specification, check sensor,
mating encoder and their installation conditions.
Voltage at the resistance (115 Ω) without wheel
rotation
680 to 960 mV
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1
4
3
2
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4. "BLK" wire terminal
5. Power supply (12 V)
7) Measure voltage at resistance with wheel rotation
and confirm voltage alternately changes between
high and low voltages.
If voltage does not change with wheel rotation, check
sensor, mating encoder and their installation
conditions.
Voltage at the resistance (115 Ω) with wheel
rotation
High voltage "a": 1360 to 1930 mV
Low voltage "b": 680 to 960 mV
[A]: Voltage
Reference
When using oscilloscope for this check, check if peak-to-
peak voltage and waveform meet specification.
Peak-to-peak Voltage at the resistance (115 Ω) with
wheel rotation
High voltage "a": 1360 to 1930 mV
Low voltage "b": 680 to 960 mV
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[B]: Time
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