Suzuki SX4 Service Manual page 675

DTC Troubleshooting
Step
1 Was "Electronic Stability Program Check" performed?
2 Check DTC for ESP®
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC for ESP®.
Is DTC C1021, C1022, C1025, C1026, C1031, C1032,
C1035 and/or C1036 detected together?
3 Check tire condition
1) Check that tire pressure is specifications.
Are they in good condition?
4 Wheel speed sensor circuit check
1) Disconnect ESP® hydraulic unit / control module
connector and all wheel speed sensor connectors with
ignition switch turned OFF.
2) Check for proper connection to ESP® hydraulic unit /
control module connector and terminals of wheel speed
sensor.
3) If OK then check all wheel speed sensors circuit for
open, short and high resistance.
Are wheel speed sensor circuits in good condition?
5 Wheel speed sensor check
1) Inspection all wheel speed sensors referring to "Front
and Rear Wheel Speed Sensor On-Vehicle Inspection in
Section 4E".
Are they in good condition?
6 Wheel speed sensor encoder check
1) Inspection all wheel speed sensor encoders referring to
"Front Wheel Speed Sensor Encoder On-Vehicle
Inspection in Section 4E" and/or "Rear Wheel Speed
Sensor Encoder On-Vehicle Inspection in Section 4E".
Are they in good condition?
7 Wheel speed sensor signal check
1) Inspection all wheel speed sensors referring to "Front
and Rear Wheel Speed Sensor On-Vehicle Inspection in
Section 4E".
Are they in good condition?
Action
Electronic Stability Program:
Yes
Go to Step 2.
Go to "DTC C1021 /
C1022 / C1025 / C1026
/ C1031 / C1032 /
C1035 / C1036: Wheel
Speed Sensor Circuit /
Sensor or Encoder" and
recheck.
Go to Step 3.
Go to Step 5.
Go to Step 6.
Go to Step 7.
Substitute a known-
good wheel hub
assembly and recheck.
If DTC detected,
substitute a known-
good ESP® hydraulic
unit / control module
and recheck.
4F-37
No
Go to "Electronic
Stability Program
Check".
Go to Step 3.
Replace tire or adjust
tire pressure and
recheck.
Repair circuit and
recheck.
Clean or replace.
Clean or replace wheel
hub assembly.
Replace wheel speed
sensor and recheck.