2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1093

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1093

The trailer brake control module detects a short to ground, open or a short to voltage on the relay feedback circuit.

Action Taken When the DTC Sets

* The trailer brake control will be disabled for the remainder of the ignition cycle.

* The driver information center will display Service Trailer Brake System.

Condition for Clearing the DTC

* The condition for the DTC is no longer present.

* The trailer brake control module clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

Reference Information

Schematic Reference

Trailer Brake Control Schematics (See: Brakes and Traction Control/Diagrams/Electrical Diagrams)

Connector End View Reference

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

Description and Operation

Trailer Brake Controls Description and Operation (See: Powertrain Management/Computers and Control Systems/Description and

Operation/Trailer Brake Controls 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

Ignition ON, observe the scan tool trailer brake controls user gain parameter. The reading should be between 0-100 percent, and change with

operating the gain switch up or gain switch down.

Circuit/System Testing

Note: These diagnostics are based on having no trailer connected.

1. Ignition ON, verify that DTC P2534 is not set.

瀚慖f the DTC is set, refer to DTC P2534 (See: P Code Charts/P2534/Wiring Systems and Power Management).

2. Ignition OFF, disconnect the harness connector at the solid state relay.

3. Test for less than 5 ohm between the ground circuit terminal B and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

4. Ignition OFF, verify that a test lamp illuminates between the B+ circuit terminal F and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the

STUD 2 fuse is open, replace the trailer brake control relay.

5. Ignition ON, verify that a test lamp does not illuminate between control circuit terminal E and ground.

瀚慖f test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control module.

6. Ignition ON, verify that a test lamp does not illuminate between control circuit terminal E and B+.

瀚慖f test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the trailer brake control module.