2010 Cadillac Truck SRX AWD V6-3.0L Page 223
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
* The DTC will be a history DTC when the voltage is present and the power mode is OFF or ACC or when voltage is not present and the
power mode is RUN or CRANK.
* A history DTC will clear after 50 ignition cycles.
Diagnostic Aids
Verify that DTC B144B is not set prior to performing extensive electrical diagnostics.
Reference Information
Schematic Reference
* Column Lock Schematics (See: Diagrams/Electrical Diagrams/Steering/Steering Column)
* Power Moding Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System
Diagram/Power Moding Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Steering Wheel and Column Description and Operation (See: Steering and Suspension/Steering/Steering Column/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 Testing
1. Ignition OFF, disconnect the KR73 RUN/CRNK relay.
2. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 87A and ground.
瀚慖f the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K60 Steering Column Lock
Control Module.
3. Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground.
瀚慖f the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
4. Ignition OFF, disconnect the harness connector at the K60 steering column lock control module.
5. Connect a test lamp between the voltage circuit terminal 3 and ground.
6. Ignition ON, connect a 5 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87A. Verify the test lamp is
illuminated.
瀚慖f the test lamp is not illuminated and the control circuit fuse is good, test the control circuit for an open/high resistance.
瀚慖f the test lamp is not illuminated and the control circuit fuse is open, test the control circuit for a short to ground. If the circuit tests
normal, replace the K60 steering column lock control module.
7. If all circuits test normal, test or replace the KR73 RUN/CRNK relay.
Component Testing
Relay Test
1. Ignition OFF, disconnect the KR73 RUN/CRNK relay.
2. Test for 60-200 ohm between terminals 85 and 86.
瀚慖f not within the specified range, replace the KR73 RUN/CRNK relay.
