you have more messages displaying.. but this shows part of it-- which may not be your problem.
On some
2007-2010 OUTLOOK; 2007-2011 Acadia; 2008-2011
Enclave, CTS/CTS-V; 2009-2011 Traverse;the
following DTCs or Symptom codes may be set: C0035, C0040,
C0045, C0050, with symptom bytes 18, 5A, 0F. The ABS, Service
Traction Control System, and/or Service StabiliTrak lights also
may be illuminated.
This condition may be
caused by single or multiple
pieces of ferrous
metallic debris stuck to
the wheel speed sensor
magnetic encoder ring.
Instead of a traditional
mechanical-type tooth
tone wheel, some new
model vehicles use a
wheel speed sensor tone
wheel made of a magnetized
nitrile rubber ring,
typically brown in color.
This magnetic encoder
ring is now part of the inboard
bearing hub assembly
The magnetic encoder consists of multiple North and South pole
pairs surrounding the outer circumference. When the magnetic
encoder ring rotates and passes by the wheel speed sensor head,
it generates a sine wave in the wheel speed sensor. The wheel
speed sensor converts an analog signal to a digital square wave,
and typical digital signal values switch between 7mA (Low) and
14mA (High) DC current.
Encoder Ring
Cleaning
Inspect and clean any
debris from the encoder
ring using the following
procedure. This inspection
and cleaning procedure is
supporting information to
with symptom bytes 18, 5A, 0F can be repaired by removing or
cleaning any accumulated debris on the magnetic encoder ring,
located on the inboard side of the bearing hub.
TIP: Most repairs can be
performed without replacement
of the bearing hub assembly or
wheel speed sensor. Be careful
not to damage the bearing outer
seal when brushing or cleaning
the magnetic encoder debris.
Do not use any type of magnetic
tool to remove the debris from
the bearing magnetic encoder.
An external magnet can damage
the encoder.
1. Based on the specific EBCM
Wheel Speed Sensor DTC
code, inspect the appropriate
corner magnetic encoder ring
for possible debris.
• C0035 Left Front Corner
• C0040 Right Front Corner
• C0045 Left Rear Corner
• C0050 Right Rear Corner
2. If debris is found, gently use a
dry nylon soft bristle brush to
remove the foreign debris from
the magnetic encoder ring. If
debris was removed, proceed
to step 3.
If debris still remains, wash the
encoder ring using a mild soap
detergent and wipe dry.
3. Connect a scan tool to the
vehicle. Turn on the ignition.
Clear the DTCs.
4. Perform vehicle diagnostic
repair verification procedure for DTC C0035-C0050. Refer to the
appropriate Service Information.
the SI wheel speed sensor
diagnostic mechanical
fault table. In most cases
the DTCs C0035-C0050