2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 823

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 823

Circuit/System Description

The wheel speed sensor receives ignition voltage from the electronic brake control module (EBCM) and provides a DC square wave signal back to

the module. 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 00-C0050 00

* Ignition ON.

* Ignition voltage is greater than 9.5 volts.

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* Ignition ON.

* Ignition voltage is greater than 9.5 volts.

* The brake pedal is not pressed.

* A DTC is not set for the other wheel speed sensor on the same axle.

Conditions for Setting the DTC

C0035 00-C0050 00

* A short to ground, or an open/high resistance is detected on the wheel speed sensor 12-volt reference circuit.

* A short to voltage, short to ground or an open/high resistance is detected on the signal circuit.

* Wheel speed sensor power supply is less than 7.6 volts.

* A missing wheel speed sensor signal

C0035 5A-C0050 5A

An erratic signal output of the wheel speed sensor is detected.

Actions Taken when the DTC Sets

* The EBCM disables the antilock brake system (ABS)/traction control system and vehicle stability enhancement system (VSES) for the

duration of the ignition cycle.

* The ABS indicator illuminates.

* The StabiliTrak indicator illuminates.

* The EBCM disables the voltage to the wheel speed sensor the fault is detected on.

Conditions for Clearing the DTC

* A current DTC clears when the diagnostic runs and passes.

* A history DTC clears after 100 consecutive ignition cycles, if no failures are reported by this diagnostic.

Diagnostic Aids

* Inspect the back of the wheel bearing on the encoder surface for metal debris that could cause an erratic reading with the sensor. Do not use a

magnet to clean the debris, or damage to the encoder ring may occur.

* If 2 or more wheel speed sensors are inoperative diagnose each wheel speed sensor individually.