Front / Rear Wheel Speed Sensor On-Vehicle Inspection - Suzuki Swift Sport 2004 Service & Repair Manual

4E-31 ABS:
2) Bleed air from brake system referring to "Air
Bleeding of Brake System in Section 4A".
3) Check each installed part for fluid leakage and
perform "ABS Hydraulic Unit Operation Check".
NOTE
For new ABS hydraulic unit / control module
assembly, if "ABS Hydraulic Unit Operation
Check" has not been performed, ABS
warning light may flash when ignition switch
is turned ON position.
Accordingly preform "ABS Hydraulic Unit
Operation Check" to stop flashing of ABS
warning light.
Front / 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.
5
[A]: Front wheel speed sensor
[B]: Rear wheel speed sensor
1. Wheel speed sensor connector
2. Resistance (115 Ω)
S7RS0B4506005
[A]
1
4
3
V
[B]
1
4
3
2
I6RS0B460031-02
3. "WHT" wire terminal
4. "BLK" wire terminal
5. Power supply (12 V)
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
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
I5JB0A450027-01
[B]: Time
I5JB0A450028-02