Dtc C1033: Wheel Speed Sensor Deviation - Suzuki SX4 Service Manual

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4E-25 ABS:

DTC C1033: Wheel Speed Sensor Deviation

Wiring Diagram
Refer to "Wiring Diagram" under "DTC C1021 / C1022 / C1025 / C1026 / C1031 / C1032 / C1035 / C1036: Wheel
Speed Sensor Circuit / Sensor or Encoder".
DTC Detecting Condition and Trouble Area
DTC Detecting Condition
• Three or more sensor signals seem to be effected by
temporary failure suspicion at the same time.
• One wheel or more are controlled by ABS for more than
specified time.
DTC Troubleshooting
Step
1
Was "ABS Check" performed?
2
Check DTC for ABS
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ignition switch ON and check DTC for ABS.
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 ABS hydraulic unit / control module
connector and all wheel speed sensor connectors with
ignition switch turned OFF.
2) Check for proper connection to ABS 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 Inspection".
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" and "Rear Wheel Speed Sensor Encoder
On-Vehicle Inspection".
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".
Are they in good condition?
Action
Trouble Area
• Wheel speed sensor
• Wheel speed sensor circuit
• Wheel encoder
• ABS control module
• Tire (flat tire)
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 4.
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 ABS hydraulic unit
/ control module and
recheck.
S7RW0A4504016
No
Go to "ABS 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.

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