DTC C0035, C0040, C0045, or C0050
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DTC C0035, C0040, C0045, or C0050
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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
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Left Front Wheel Speed Sensor 12V Reference
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C0035 06
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C0035 5A
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C0035 06
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C0035 0F, C0035 18
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Right Front Wheel Speed Sensor 12V Reference
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C0040 06
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C0040 5A
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C0040 06
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C0040 0F, C0040 18
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Left Rear Wheel Speed Sensor 12V Reference
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C0045 06
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C0045 5A
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C0045 06
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C0045 0F, C0045 18
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Right Rear Wheel Speed Sensor 12V Reference
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C0050 06
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C0050 5A
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C0050 06
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C0050 0F, C0050 18
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Left Front Wheel Speed Sensor Low Reference
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C0035 06
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C0035 5A
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C0035 06
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C0035 0F, C0035 18
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Right Front Wheel Speed Sensor Low Reference
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C0040 06
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C0040 5A
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C0040 06
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C0040 0F, C0040 18
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Left Rear Wheel Speed Sensor Low Reference
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C0045 06
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C0045 5A
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C0045 06
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C0045 0F, C0045 18
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Right Rear Wheel Speed Sensor Low Reference
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C0050 06
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C0050 5A
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C0050 06
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C0050 0F, C0050 18
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Component
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Condition
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DTCs
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Left Front Wheel Speed Sensor
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•
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Debris on the wheel speed sensor or the encoder ring
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•
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Water intrusion in the wiring harness
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C0035 06, C0035 0F, C0035 18, C0035 5A
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Right Front Wheel Speed Sensor
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•
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Debris on the wheel speed sensor or the encoder ring
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•
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Water intrusion in the wiring harness
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C0040 06, C0040 0F, C0040 18, C0040 5A
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Left Rear Wheel Speed Sensor
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•
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Debris on the wheel speed sensor or the encoder ring
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•
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Water intrusion in the wiring harness
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C0045 06, C0045 0F, C0045 18, C0045 5A
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Right Rear Wheel Speed Sensor
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•
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Debris on the wheel speed sensor or the encoder ring
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•
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Water intrusion in the wiring harness
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C0050 06, C0050 0F, C0050 18, C0050 5A
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Circuit/System Description
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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 a 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.
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Conditions for Running the DTC
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C0035 06, C0040 06, C0045 06, and C0050 06
Ignition ON
C0035 0F, C0040 0F, C0045 0F, and C0050 0F
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•
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Vehicle speed is greater than 12.9 km/h (8 MPH)
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C0035 18, C0040 18, C0045 18, and C0050 18
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•
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Vehicle speed is greater than 6 km/h (3.7 MPH)
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C0035 5A, C0040 5A, C0045 5A, and C0050 5A
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•
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Vehicle speed is greater than 1.5 km/h (0.9 MPH)
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Conditions for Setting the DTC
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C0035 06, C0040 06, C0045 06, and C0050 06
A short to voltage or short to ground on the wheel speed sensor 12 V reference or low reference circuit is detected for 0.1 s.
C0035 0F, C0040 0F, C0045 0F, and C0050 0F
An erratic wheel speed sensor signal is detected.
C0035 18, C0040 18, C0045 18, and C0050 18
A missing wheel speed sensor signal is detected for 3-10 s.
C0035 5A, C0040 5A, C0045 5A, and C0050 5A
An open/high resistance on the wheel speed sensor 12 V reference or low reference circuit is detected for 0.75-3.75 s.
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Action Taken When the DTC Sets
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The EBCM disables the ABS, traction control, stability control and hill start assist for the duration of the ignition cycle.
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The ABS indicator turns ON.
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The traction control/stability control-active indicator turns ON.
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Conditions for Clearing the DTC
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A current DTC clears when the diagnostic runs and passes.
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•
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The EBCM will turn OFF the indicator in the next ignition cycle.
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•
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Do not use a magnet to clean the encoder ring.
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•
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If 2 or more wheel speed sensors are inoperative, diagnose each wheel speed sensor individually.
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•
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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. If the DTC is not current, clear all DTCs and simulate the effects of water intrusion by using the following procedure:
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1.
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Spray the suspected area with a 5% saltwater solution.
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2.
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Test drive the vehicle over various road surfaces (bumps, turns, etc.), above 40 km/h (25 MPH) for at least 30 s.
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3.
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Rinse the area thoroughly when completed.
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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
for scan tool information
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Circuit/System Verification
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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).
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1.
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Inspect the appropriate wheel speed sensor for contamination, physical damage and correct installation.
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2.
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If contamination, physical damage or incorrect installation is diagnosed, repair or replace the wheel speed sensor.
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3.
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Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module and at the wheel speed sensor.
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4.
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Ignition ON, test for less than 0.3 V between the circuit terminal listed below and ground:
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•
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Left front wheel speed sensor low reference circuit terminal 28 at the K17 Electronic Brake Control Module harness connector
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•
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Right front wheel speed sensor low reference circuit terminal 4 at the K17 Electronic Brake Control Module harness connector
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Left rear wheel speed sensor low reference circuit terminal 35 at the K17 Electronic Brake Control Module harness connector
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Right rear wheel speed sensor low reference circuit terminal 10 at the K17 Electronic Brake Control Module harness connector
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5.
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If greater than the specified value, test the low reference circuit for a short to voltage.
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6.
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Test for less than 0.3 V between the circuit terminal listed below and ground:
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Left front wheel speed sensor 12 V reference circuit terminal 27 at the K17 Electronic Brake Control Module harness connector
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Right front wheel speed sensor 12 V reference circuit terminal 3 at the K17 Electronic Brake Control Module harness connector
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Left rear wheel speed sensor 12 V reference circuit terminal 36 at the K17 Electronic Brake Control Module harness connector
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Right rear wheel speed sensor 12 V reference circuit terminal 11 at the K17 Electronic Brake Control Module harness connector
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7.
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If greater than the specified value, test the 12 V reference circuit for a short to voltage.
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8.
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Ignition OFF, test for infinite resistance between the circuit terminal listed below and ground:
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Left front wheel speed sensor low reference circuit terminal 28 at the K17 Electronic Brake Control Module harness connector
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Right front wheel speed sensor low reference circuit terminal 4 at the K17 Electronic Brake Control Module harness connector
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•
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Left rear wheel speed sensor low reference circuit terminal 35 at the K17 Electronic Brake Control Module harness connector
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•
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Right rear wheel speed sensor low reference circuit terminal 10 at the K17 Electronic Brake Control Module harness connector
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9.
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If less than the specified value, test the low reference circuit for a short to ground.
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10.
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Test for infinite resistance between the circuit terminal listed below and ground:
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Left front wheel speed sensor 12 V reference circuit terminal 27 at the K17 Electronic Brake Control Module harness connector
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•
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Right front wheel speed sensor 12 V reference circuit terminal 3 at the K17 Electronic Brake Control Module harness connector
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•
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Left rear wheel speed sensor 12 V reference circuit terminal 36 at the K17 Electronic Brake Control Module harness connector
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•
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Right rear wheel speed sensor 12 V reference circuit terminal 11 at the K17 Electronic Brake Control Module harness connector
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11.
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If less than the specified value, test the 12 V reference circuit for a short to ground.
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12.
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Test for infinite resistance between the circuit terminals listed below:
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•
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Left front wheel speed sensor 12 V reference circuit terminal 27 and low reference circuit terminal 28 at the K17 Electronic Brake Control Module harness connector
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•
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Right front wheel speed sensor 12 V reference circuit terminal 3 and low reference circuit terminal 4 at the K17 Electronic Brake Control Module harness connector
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•
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Left rear wheel speed sensor 12 V reference circuit terminal 36 and low reference circuit terminal 35 at the K17 Electronic Brake Control Module harness connector
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•
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Right rear wheel speed sensor 12 V reference circuit terminal 11 and low reference circuit terminal 10 at the K17 Electronic Brake Control Module harness connector
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13.
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If less than the specified value, test the 12 V reference circuit and the low reference circuit for a short circuit.
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14.
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Connect the harness connector at the K17 Electronic Brake Control Module.
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15.
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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.
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16.
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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.
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17.
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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.
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18.
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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.
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19.
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If all circuits test normal, test the wheel speed sensor.
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Note
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Circuit/System Testing must be performed before Component Testing.
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Dynamic Test
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1.
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Ignition OFF, connect the harness connector at the wheel speed sensor.
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2.
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Disconnect the harness connector at the K17 Electronic Brake Control Module.
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3.
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Connect a fused jumper wire between B+ and the circuit terminal listed below:
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•
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Left front wheel speed sensor 12 V reference circuit terminal 27 at the K17 Electronic Brake Control Module harness connector
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•
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Right front wheel speed sensor 12 V reference circuit terminal 3 at the K17 Electronic Brake Control Module harness connector
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•
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Left rear wheel speed sensor 12 V reference circuit terminal 36 at the K17 Electronic Brake Control Module harness connector
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•
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Right rear wheel speed sensor 12 V reference circuit terminal 11 at the K17 Electronic Brake Control Module harness connector
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4.
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Spin the wheel very slowly, test for alternating current between ca. 7 mA and ca. 14 mA between the circuit terminal listed below and ground:
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•
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Left front wheel speed sensor low reference circuit terminal 28 at the K17 Electronic Brake Control Module harness connector
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•
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Right front wheel speed sensor low reference circuit terminal 4 at the K17 Electronic Brake Control Module harness connector
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•
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Left rear wheel speed sensor low reference circuit terminal 35 at the K17 Electronic Brake Control Module harness connector
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•
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Right rear wheel speed sensor low reference circuit terminal 10 at the K17 Electronic Brake Control Module harness connector
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5.
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If not within the specified range, replace the wheel speed sensor.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
