DTC C0035, C0040, C0045, or C0050
|
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
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
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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 12 V Reference
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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
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Right Rear Wheel Speed Sensor 12 V Reference
|
C0050 06
|
C0050 06
|
C0050 06
|
C0050 0F, C0050 18, C0050 5A
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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
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Component
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Condition
|
DTCs
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Wheel Speed Sensor
|
•
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Debris on the wheel speed sensor or the encoder ring
|
•
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Air gap between the wheel speed sensor and the encoder ring too large
|
•
|
Water intrusion in the wiring harness
|
|
0F, 18, 5A
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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 voltages from the electronic brake control module (EBCM). The wheel speed sensor produces changing current between 7-14 mA on the EBCM signal circuit. As the wheel spins, the EBCM uses the frequency of the square wave signal to calculate the actual wheel speed.
Conditions for Running the DTC
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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
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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 second.
C0035 0F - C0050 0F
An erratic wheel speed sensor signal is detected for 0.17 second.
C0035 18 - C0050 18
A missing wheel speed sensor signal is detected for 180 seconds.
C0035 5A - C0050 5A
Difference between fastest and slowest wheel speed is greater than 50% for 30 seconds.
Action Taken When the DTC Sets
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•
|
The EBCM disables the ABS, traction control, and stability control 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
|
•
|
A current DTC clears when the diagnostic runs and passes.
|
•
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The EBCM will turn OFF the indicator in the next ignition cycle.
|
•
|
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.
|
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
Circuit/System Verification
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1.
|
Drive the vehicle in a straight line at a speed greater than 20 km/h (13 mph).
|
2.
|
Verify all scan tool Wheel Speed Sensor parameters are within 1.6 km/h 1 mph of each other.
|
1.
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Ignition OFF, disconnect the harness connector at the appropriate B5 wheel speed sensor, ignition ON.
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2.
|
Test for greater than 11 V between the signal circuit terminal B and ground.
|
|
2.1.
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Ignition OFF, disconnect the harness connector at the K17 EBCM.
|
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2.2.
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Test for infinite resistance between the signal circuit and ground.
|
|
2.3.
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Test for less than 2 Ω in the signal circuit end to end.
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3.
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Install a 3 A fused jumper wire at the signal circuit terminal B.
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4.
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Verify the scan tool Wheel Speed Sensor parameter changes while rapidly tapping the fused jumper wire to the low reference circuit terminal A.
|
|
4.1.
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Ignition OFF, disconnect the harness connector at the K17 EBCM, ignition ON.
|
|
4.2.
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Test for less than 1 V between the signal circuit and ground.
|
|
4.3.
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Test for less than 1 V between the low reference circuit and ground.
|
|
4.5.
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Test for infinite resistance between the low reference circuit and ground.
|
|
4.6.
|
Test for less than 2 Ω in the low reference circuit end to end.
|
5.
|
Test or replace the B5 wheel speed sensor.
|
Note
|
The following wheel speed sensor test is polarity sensitive. The wheel speed sensor can be permanently damaged if the polarity is reversed during the test.
|
1.
|
Ignition OFF, disconnect the harness connector at the appropriate B5 wheel speed sensor.
|
2.
|
Connect a 3 A fused jumper wire between the signal terminal B and 12 V.
|
3.
|
Connect a DMM set to read DC amperage between the low reference terminal A and ground.
|
4.
|
Spin the wheel very slowly.
|
5.
|
Test for a DC current switching between a low value of 4-8 mA and a high value of 11-16 mA.
|
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.