Suzuki Swift Sport 2004 Service & Repair Manual page 558

4E-19 ABS:
DTC Troubleshooting
Step
1 Was "ABS Check" performed?
2 1) Disconnect applicable ABS wheel speed sensor coupler
with ignition switch OFF.
2) Measure resistance between terminals of ABS wheel
speed sensor. Refer to "Front Wheel Speed Sensor
Inspection" and/or "Front Wheel Encoder On-Vehicle
Inspection".
Is measured resistance value as specified?
3 1) Turn ignition switch OFF.
2) Connect applicable ABS wheel speed sensor coupler.
3) Disconnect ABS hydraulic unit / control module
connector.
4) Check for proper connection to ABS control module at
each sensor terminal.
5) If OK, then turn ignition switch ON and measure voltage
between applicable sensor terminal of module connector
and body ground.
Is it 0 V?
4 1) Turn ignition switch OFF.
2) Measure resistance between the following points.
• Both ABS hydraulic unit / control module connector
terminals of the corresponding sensor. This check
result should be the same as Step 2).
• Either terminal of wheel speed sensor coupler and
body ground. This check result should be no
continuity.
Are both check results OK?
5 1) Remove applicable ABS wheel speed sensor.
2) Check sensor for damage or foreign material attached.
Is it in good condition?
6 Check front and/or rear sensor ring for the following (remove
rear drum as necessary):
• Sensor ring serration (teeth) neither missing nor damaged
• No foreign material being attached
• Sensor ring not being eccentric
• Wheel bearing free from excessive play
Are they in good condition?
7 1) Install ABS wheel speed sensor to knuckle.
2) Tighten sensor bolt to specified torque and check that
there is no clearance between sensor and knuckle.
Is it OK?
8 Refer to "Front / Rear Wheel Speed Sensor On-Vehicle
Inspection" and/or "Rear Wheel Speed Sensor Removal and
Installation", check output voltage or waveform.
Is specified voltage and/or waveform obtained?
Action Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Go to Step 5.
Go to Step 6.
Go to Step 7.
Go to Step 8.
Substitute a known-
good ABS hydraulic unit
/ control module
assembly and recheck.
No
Go to "ABS Check".
Replace ABS wheel
speed sensor assembly.
ABS wheel speed
sensor circuit shorted to
power.
Circuit open or shorted
to ground.
Clean, repair or replace.
Clean, repair or replace.
Replace ABS wheel
speed sensor.
Replace sensor and
recheck.