Suzuki 2006 SX4, Service Manual

Page: 569 / 1478

ABS: 4E-21
DTC Troubleshooting
Step Action Yes No
1 Was “ABS Check” performed? Go to Step 2. Go to “ABS Check”.
2 Check tire condition
1) Check that tire pressure is specifications.
Are they in good condition?
Go to Step 3. Replace tire or adjust
tire pressure and
recheck.
3 Wheel speed sensor circuit check
1) Disconnect ABS hydraulic unit / control module
connector and applicable wheel speed sensor connector
with ignition switch turned OFF.
2) Check for proper connection to ABS hydraulic unit /
control module connector at applicable terminals and
terminals of applicable wheel speed sensor.
3) If OK then check applicable wheel speed sensor circuit
for open, short and high resistance.
Is each applicable wheel speed sensor circuit in good
condition?
Go to Step 4. Repair circuit and
recheck
4 Wheel speed sensor check
1) Inspection applicable wheel speed sensor referring to
“Front and Rear Wheel Speed Sensor Inspection”.
Is it in good condition?
Go to Step 5. Clean or replace.
5 Wheel speed sensor encoder check
1) Inspection applicable wheel speed sensor encoder
referring to “Front Wheel Speed Sensor Encoder On-
Vehicle Inspection” and/or “Rear Wheel Speed Sensor
Encoder On-Vehicle Inspection”.
Is it in good condition?
Go to Step 6. Clean or replace wheel
hub assembly.
6 Wheel speed sensor signal check
1) Inspection applicable wheel speed sensor referring to
“Front and Rear Wheel Speed Sensor On-Vehicle
Inspection”.
Is it in good condition?
Substitute a known-
good wheel hub
assembly and recheck.
If DTC detected,
substitute a known-
good ABS hydraulic unit
/ control module and
recheck. Replace wheel speed
sensor and recheck.