2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 875

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 875

Circuit/System Description

The pump motor is a bi-directional motor and is an internal part of the brake pressure modulator valve assembly. There are three solid state relays

in the electronic brake control module (EBCM) that operate the pump. The pump motor runs every few brake stops in order to fill the high pressure

accumulator with brake fluid anytime the engine is running.

Conditions for Running the DTC

* Ignition ON.

* Ignition voltage is greater than 10 volts.

* The system enable relay is ON.

* The pump motor has been commanded ON, OFF and ON again.

Conditions for Setting the DTC

* The EBCM detects a short to ground or an open/high resistance on the B+ circuit.

* The EBCM detects an open/high resistance on the ground circuit.

* The EBCM detects the pump motor runs continuously.

* The EBCM detects the pump motor is binding or stalled.

Action Taken When the DTC Sets

* The EBCM disables the ABS/Traction Control System/Vehicle Stability Enhancement System for the duration of the ignition cycle.

* The ABS indicator illuminates.

* The red Brake indicator illuminates.

* The Stability Control indicator illuminates.

* The driver information center displays Service Brake Soon, Service StabiliTrak and Service Traction Control messages.

Conditions for Clearing the DTC

* The condition for the DTC is no longer present and the United Nations Economic Commission for Europe regulation number 13 response is

completed by driving the vehicle at speeds greater than 15 km/h (10 mph) to complete the self test, then the EBCM will turn off the ABS

indicator.

* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

Diagnostic Aids

* Find out from the customer the conditions under which the DTC was set. This information may help duplicate the failure like the specific

number of brake pedal applies in a row prior to the fault set.

* Check for hydraulic leaks, air in the brake system or an improper brake bleed.

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