Suzuki Wagon R Manual page 1407

Reference
When using oscilloscope for this check, check if peak-to-peak
voltage (1) meets specification and waveform is complete.
Peak-to-peak voltage at 1/2 to 1 rotation per second
150 mV or more at 20 Hz
SENSOR INSPECTION
• Check sensor for damage.
• Check sensor for resistance and continuity.
If the check result is not as specified and any malcondition is
found, replace.
Between both terminals of sensor
1.2 – 1.6 k Ω Ω Ω Ω at 20°C (68°F)
Between sensor terminal and sensor body
No continuity
Rear Wheel Speed Sensor Ring
INSPECTION
• Check rotor serration (teeth) for being missing damaged or
deformed.
• Turn wheel and check if rotor rotation is free from eccentricity
and looseness.
• Check that no foreign material is attached.
• If any faulty is found, repair or replace.
REMOVAL/ INSTALLATION
NOTE:
The rear wheel speed sensor ring can not be removed or
replaced alone. If rear wheel speed sensor ring needs to
be replaced, replace it as a retainer ring of rear axle shaft.
For removal and installation of retainer ring of rear axle shaft,
refer to "REAR AXLE SHAFT AND WHEEL BEARING" in Section
3E.
ANTILOCK BRAKE SYSTEM (ABS) 5E1-9