DTC C0035, C0040, C0045, or C0050
Diagnostic Instructions
DTC Descriptors
DTC C0035 06: Left Front Wheel Speed Sensor
Circuit Low Voltage/Open
DTC C0035 0F: Left Front Wheel Speed Sensor
Circuit Signal Erratic
DTC C0035 18: Left Front Wheel Speed Sensor
Circuit Low Signal Amplitude
DTC C0035 5A: Left Front Wheel Speed Sensor
Circuit Not Plausible
DTC C0040 06: Right Front Wheel Speed
Sensor Circuit Low Voltage/Open
DTC C0040 0F: Right Front Wheel Speed
Sensor Circuit Signal Erratic
DTC C0040 18: Right Front Wheel Speed
Sensor Circuit Low Signal Amplitude
DTC C0040 5A: Right Front Wheel Speed
Sensor Circuit Not Plausible
DTC C0045 06: Left Rear Wheel Speed Sensor
Circuit Low Voltage/Open
DTC C0045 0F: Left Rear Wheel Speed Sensor
Circuit Signal Erratic
DTC C0045 18: Left Rear Wheel Speed Sensor
Circuit Low Signal Amplitude
DTC C0045 5A: Left Rear Wheel Speed Sensor
Circuit Not Plausible
DTC C0050 06: Right Rear Wheel Speed Sensor
Circuit Low Voltage/Open
DTC C0050 0F: Right Rear Wheel Speed Sensor
Circuit Signal Erratic
DTC C0050 18: Right Rear Wheel Speed Sensor
Circuit Low Signal Amplitude
DTC C0050 5A: Right Rear Wheel Speed Sensor
Circuit Not Plausible
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Left Front Wheel Speed Sensor 12 V Reference
|
C0035 06
|
C0035 06
|
C0035 06
|
C0035 0F, C0035 18, C0035 5A
|
Right Front Wheel Speed Sensor 12 V Reference
|
C0040 06
|
C0040 06
|
C0040 06
|
C0040 0F, C0040 18, C0040 5A
|
Left Rear Wheel Speed Sensor 12 V Reference
|
C0045 06
|
C0045 06
|
C0045 06
|
C0045 0F, C0045 18, C0045 5A
|
Right Rear Wheel Speed Sensor 12 V Reference
|
C0050 06
|
C0050 06
|
C0050 06
|
C0050 0F, C0050 18, C0050 5A
|
Left Front Wheel Speed Sensor Low Reference
|
C0035 06
|
C0035 06
|
C0035 06
|
C0035 0F, C0035 18, C0035 5A
|
Right Front Wheel Speed Sensor Low Reference
|
C0040 06
|
C0040 06
|
C0040 06
|
C0040 0F, C0040 18, C0040 5A
|
Left Rear Wheel Speed Sensor Low Reference
|
C0045 06
|
C0045 06
|
C0045 06
|
C0045 0F, C0045 18, C0045 5A
|
Right Rear Wheel Speed Sensor Low Reference
|
C0050 06
|
C0050 06
|
C0050 06
|
C0050 0F, C0050 18, C0050 5A
|
Component
|
Condition
|
DTCs
|
Left Front Wheel Speed Sensor
|
• |
Debris on the wheel speed sensor or the encoder
ring |
• |
Water intrusion in the wiring harness |
|
C0035 06, C0035 0F, C0035 18, C0035 5A
|
Right Front Wheel Speed Sensor
|
• |
Debris on the wheel speed sensor or the encoder
ring |
• |
Water intrusion in the wiring harness |
|
C0040 06, C0040 0F, C0040 18, C0040 5A
|
Left Rear Wheel Speed Sensor
|
• |
Debris on the wheel speed sensor or the encoder
ring |
• |
Water intrusion in the wiring harness |
|
C0045 06, C0045 0F, C0045 18, C0045 5A
|
Right Rear Wheel Speed Sensor
|
• |
Debris on the wheel speed sensor or the encoder
ring |
• |
Water intrusion in the wiring harness |
|
C0050 06, C0050 0F, C0050 18, C0050 5A
|
Circuit/System Description
The wheel speeds are detected by active wheel speed sensors and
encoder rings. The encoder ring consists of permanent magnets. Each
wheel speed sensor receives 12 V reference voltage from the
electronic brake control module (EBCM) and provides an alternating
current square wave signal to the EBCM. As the wheel spins, the
EBCM uses the frequency of the square wave signal to calculate the
wheel speed.
Conditions for Running the DTC
C0035 06-C0050 06
Ignition ON
C0035 0F-C0050 0F
• |
Vehicle speed is greater than 35 km/h
(22 MPH). |
C0035 18-C0050 18
• |
Vehicle speed is greater than 10 km/h
(6 MPH). |
C0035 5A-C0050 5A
• |
Vehicle speed is greater than 20 km/h
(13 MPH). |
Conditions for Setting the DTC
C0035 06-C0050 06
A short to voltage, short to ground or open/high resistance on
the wheel speed sensor 12 V reference or low reference circuit
is detected for 0.14 s.
C0035 0F-C0050 0F
An erratic wheel speed sensor signal is detected for
0.17 s.
C0035 18-C0050 18
A missing wheel speed sensor signal is detected for
180 s.
C0035 5A-C0050 5A
Difference between fastest and slowest wheel speed is greater
than 50% for 30 s.
Action Taken When the DTC Sets
• |
The EBCM disables the ABS, traction control, and
stability control for the duration of the ignition cycle. |
• |
The ABS indicator turns ON. |
• |
The traction control/stability control active
indicator turns ON. |
Conditions for Clearing the DTC
• |
A current DTC clears when the diagnostic runs and
passes. |
• |
The EBCM will turn OFF the indicator in the next
ignition cycle. |
Diagnostic Aids
• |
Do not use a magnet to clean the encoder
ring. |
• |
If 2 or more wheel speed sensors are inoperative,
diagnose each wheel speed sensor individually. |
• |
If the customer comments that the ABS indicator is
ON only during moist environmental conditions (rain, snow, vehicle
wash, etc.), inspect the wheel speed sensor wiring for signs of
water intrusion. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
ABS Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
Circuit/System Verification
Ignition ON, observe the scan tool Wheel Speed Sensor
parameters. The reading should be the same speed on all sensors
when driving in a straight line at a speed greater than
20 km/h (13 MPH).
Circuit/System Testing
- Inspect the appropriate wheel speed sensor for
contamination, physical damage and correct installation.
⇒ |
If contamination, physical damage or incorrect
installation is diagnosed, repair or replace the wheel speed
sensor. |
- Ignition OFF, disconnect the harness connector at the
K17 Electronic Brake Control Module and at the appropriate
wheel speed sensor.
- Ignition ON, test for less than 0.3 V between the
circuit terminal listed below and ground:
• |
Left front wheel speed sensor low reference
circuit terminal 37 at the K17 Electronic Brake Control
Module harness connector |
• |
Right front wheel speed sensor low reference
circuit terminal 26 at the K17 Electronic Brake Control
Module harness connector |
• |
Left rear wheel speed sensor low reference circuit
terminal 30 at the K17 Electronic Brake Control Module
harness connector |
• |
Right rear wheel speed sensor low reference
circuit terminal 33 at the K17 Electronic Brake Control
Module harness connector |
⇒ |
If greater than the specified value, test the low
reference circuit for a short to voltage. |
- Test for less than 0.3 V between the circuit
terminal listed below and ground:
• |
Left front wheel speed sensor 12 V reference
circuit terminal 36 at the K17 Electronic Brake Control
Module harness connector |
• |
Right front wheel speed sensor 12 V reference
circuit terminal 27 at the K17 Electronic Brake Control
Module harness connector |
• |
Left rear wheel speed sensor 12 V reference
circuit terminal 29 at the K17 Electronic Brake Control
Module harness connector |
• |
Right rear wheel speed sensor 12 V reference
circuit terminal 34 at the K17 Electronic Brake Control
Module harness connector |
⇒ |
If greater than the specified value, test the
12 V reference circuit for a short to voltage. |
- Ignition OFF, test for infinite resistance between the
circuit terminal listed below and ground:
• |
Left front wheel speed sensor low reference
circuit terminal 37 at the K17 Electronic Brake Control
Module harness connector |
• |
Right front wheel speed sensor low reference
circuit terminal 26 at the K17 Electronic Brake Control
Module harness connector |
• |
Left rear wheel speed sensor low reference circuit
terminal 30 at the K17 Electronic Brake Control Module
harness connector |
• |
Right rear wheel speed sensor low reference
circuit terminal 33 at the K17 Electronic Brake Control
Module harness connector |
⇒ |
If less than the specified value, test the low
reference circuit for a short to ground. |
- Test for infinite resistance between the circuit
terminal listed below and ground:
• |
Left front wheel speed sensor 12 V reference
circuit terminal 36 at the K17 Electronic Brake Control
Module harness connector |
• |
Right front wheel speed sensor 12 V reference
circuit terminal 27 at the K17 Electronic Brake Control
Module harness connector |
• |
Left rear wheel speed sensor 12 V reference
circuit terminal 29 at the K17 Electronic Brake Control
Module harness connector |
• |
Right rear wheel speed sensor 12 V reference
circuit terminal 34 at the K17 Electronic Brake Control
Module harness connector |
⇒ |
If less than the specified value, test the
12 V reference circuit for a short to ground. |
- Test for infinite resistance between the circuit
terminals listed below:
• |
Left front wheel speed sensor 12 V reference
circuit terminal 36 and low reference circuit terminal 37
at the K17 Electronic Brake Control Module harness
connector |
• |
Right front wheel speed sensor 12 V reference
circuit terminal 27 and low reference circuit terminal 26
at the K17 Electronic Brake Control Module harness
connector |
• |
Left rear wheel speed sensor 12 V reference
circuit terminal 29 and low reference circuit terminal 30
at the K17 Electronic Brake Control Module harness
connector |
• |
Right rear wheel speed sensor 12 V reference
circuit terminal 34 and low reference circuit terminal 33
at the K17 Electronic Brake Control Module harness
connector |
⇒ |
If less than the specified value, test the
12 V reference circuit and the low reference circuit for a
short circuit. |
- Connect the harness connector at the
K17 Electronic Brake Control Module.
- Ignition ON, test for greater than 11 V between
the 12 V reference circuit terminal 1 at the harness
connector of the wheel speed sensor and ground.
⇒ |
If less than the specified value, test the
12 V reference circuit for an open/high resistance. If the
circuit tests normal, replace the K17 Electronic Brake Control
Module. |
- Test for greater than 11 V between the 12 V
reference circuit terminal 1 and the low reference circuit
terminal 2 at the harness connector of the wheel speed
sensor.
⇒ |
If less than the specified value, test the low
reference circuit for an open/high resistance. If the circuit tests
normal, replace the K17 Electronic Brake Control Module. |
- If all circuits test normal, test the wheel speed
sensor.
Component Testing
Note: Circuit/System Testing
must be performed before Component Testing.
Dynamic Test
- Ignition OFF, connect the harness connector at the
wheel speed sensor.
- Disconnect the harness connector at the
K17 Electronic Brake Control Module.
- Connect a fused jumper wire between B+ and the
appropriate circuit terminal listed below:
• |
Left front wheel speed sensor 12 V reference
circuit terminal 36 at the K17 Electronic Brake Control
Module harness connector |
• |
Right front wheel speed sensor 12 V reference
circuit terminal 27 at the K17 Electronic Brake Control
Module harness connector |
• |
Left rear wheel speed sensor 12 V reference
circuit terminal 29 at the K17 Electronic Brake Control
Module harness connector |
• |
Right rear wheel speed sensor 12 V reference
circuit terminal 34 at the K17 Electronic Brake Control
Module harness connector |
- Spin the wheel very slowly, test for current
alternating between ca. 7 mA and ca. 14 mA between
the circuit terminal listed below and ground:
• |
Left front wheel speed sensor low reference
circuit terminal 37 at the K17 Electronic Brake Control
Module harness connector |
• |
Right front wheel speed sensor low reference
circuit terminal 26 at the K17 Electronic Brake Control
Module harness connector |
• |
Left rear wheel speed sensor low reference circuit
terminal 30 at the K17 Electronic Brake Control Module
harness connector |
• |
Right rear wheel speed sensor low reference
circuit terminal 33 at the K17 Electronic Brake Control
Module harness connector |
⇒ |
If not within the specified range, replace the
wheel speed sensor. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|