2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 998

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 998

Action Taken When the DTC Sets

* The EBCM disables the vehicle stability enhancement system for the duration of the ignition cycle.

* The driver information center displays the Service Stability System message.

* The antilock brake system (ABS) remains functional.

* The Stability 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

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Ignition ON, observe the scan tool Steering Wheel Position parameter. The reading should correspond with the actual steering wheel position

as the steering wheel is turned through its entire range of motion.

瀚慖f the parameter drops out or does not correspond with the actual steering wheel position, refer to Circuit/System Testing.

2. Observe the scan tool Digital HWPS Index Pulse parameter. The parameter should cycle between Low and High as the steering wheel is

centered and then turned through its entire range of motion.

瀚慖f the parameter does not cycle between the specified values, refer to Circuit/System Testing.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the steering angle sensor.

2. Test for less than 20 ohm between the low reference circuit terminal 2 and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.

3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.

瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the EBCM.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the EBCM.