2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 222
K9 BCM.
10. If all circuits test normal, test or replace the KR74 ignition run relay.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) Diagnostic Repair Verification after completing the repair.
* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay
Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power
Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))Relay Replacement
* Control Module References (See: Testing and Inspection/Programming and Relearning)Control Module References for BCM or keyless
entry control module replacement, setup, and programming
B144C
DTC B144C
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category.
DTC Descriptors
DTC B144C 01
- Inverted Run/Start Power Relay Circuit Short to Battery
DTC B144C 06
- Inverted Run/Start Power Relay Circuit Low Voltage/Open
Diagnostic Fault Information
Circuit/System Description
The vehicle theft deterrent subsystem provides the capability to lock or unlock the steering column electrically. The steering column lock control
module is allowed to unlock when power mode transitions to a non off power mode and an authenticated driver identification device is present.
Once the column is unlocked, a crank request can be allowed.
Conditions for Running the DTC
* The system voltage is between 9-16 V.
* The DTC can only run when the steering column lock control module is awake.
Conditions for Setting the DTC
B144C 01
The steering column lock control module detects a short to voltage when the power mode is in the RUN or CRANK for greater than 5 seconds.
B144C 06
The steering column lock control module detects a short to ground or an open in the Off/Accessory circuit when the power mode is in the
OFF/ACC for greater than 3 seconds.
Action Taken When the DTC Sets
* The steering column lock control module will command the driver information center to display the service column lock warning message.
* The steering column lock control module indicator is ON.
