2010 Cadillac CTS Sedan AWD V6-3.6L Page 705

2010 Cadillac CTS Sedan AWD V6-3.6L Page 705

The electric park brake switch control diagnostic checks for failure conditions in the electric park brake switch and associated wiring into the

electric park brake module.

Conditions for Running the DTC

Ignition OFF, ACCESSORY, or RUN mode.

Conditions for Setting the DTC

The electric parking brake module detects a short to battery, short to ground, open circuit, or an internal parking brake switch control malfunction.

Action Taken When the DTC Sets

* The electric parking brake is disabled.

* A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

* The electric parking brake module clears the history DTC when a current DTC is not detected in 40 ignition cycles.

* The condition for the DTC is no longer present.

Reference Information

Schematic Reference

Park Brake System Schematics (See: Brakes and Traction Control/Parking Brake System/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Electronic Parking Brake Control Module Description (See: Brakes and Traction Control/Parking Brake System/Parking Brake Control

Module/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

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

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Scan Tool Reference

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

Circuit/System Test

C0293 01 or C0293 06

1. Ignition OFF, disconnect the harness at the S91 Electric Parking Brake Switch.

2. Test for B+ between the B+ circuit terminal listed below and ground:

* Terminal 4

* Terminal 5

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

K83 Electric Parking Brake Control Module.

瀚慖f greater than the specified range, test the B+ circuit for a short to voltage. If the circuit tests normal, replace the K83 Electric Parking

Brake Control Module.

3. Disconnect the harness at the K83 Electric Parking Brake Control Module.

4. Ignition ON, test for less than 1 V between the following signal circuit terminals at the electric parking brake switch harness connector and

ground:

* Terminal 1

* Terminal 2

* Terminal 3

* Terminal 7

瀚慖f greater than the specified range, test the signal circuit for a short to voltage.