2010 Cadillac Truck Escalade AWD V8-6.2L Page 995
Circuit/System Description
The electronic brake control module (EBCM) applies a 5 V reference and provides a low reference to the steering wheel angle sensor and the brake
booster vacuum sensor. The EBCM monitors the signal circuit and the three phase circuits to determine the steering wheel position. The EBCM
receives three signal inputs from the steering angle sensor. The Phase C Index Pulse signal is only High when the steering wheel is centered or
within a few degrees of the straight ahead position. The 2 input signals Phase A and Phase B are approximately 90 degrees out of phase. Once
calibrated, the EBCM dynamically interprets the relationship between the Phase A and Phase B inputs, and determines the position of the steering
wheel and the direction of the steering wheel rotation.
Conditions for Running the DTC
* The ignition is ON.
* Ignition voltage is greater than 9 V.
Conditions for Setting the DTC
* Opens, short to ground, or short to voltage.
* The calculated steering angle from the steering angle sensor does not correlate with the steering angle calculated from the yaw rate.
Action Taken When the DTC Sets
* The EBCM disables the vehicle stability enhancement system (VSES) for the duration of the ignition cycle.
* The driver information center (DIC) displays the Service Stability System message.
* The antilock brake system (ABS) remains functional.
* The VSES Caution indicator turns ON.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids
* During diagnosis, park the vehicle on a level surface.
* The vehicle should not pull in either direction while driving straight on a level surface.
* Find out from the customer the conditions under which the DTC was set. This information will help to duplicate the failure.
* The snapshot function on the scan tool can help find an intermittent DTC.
Reference Information
Schematic Reference
Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation/ABS
Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
