2010 Cadillac Truck SRX AWD V6-3.0L Page 630
Conditions for Running the DTC
* The touch pad in the driver door or passenger door handle is touched within 15 minutes of any door ajar status changing.
* Any exterior door handle or handles is pulled.
* The last door becomes closed.
* Pressing the start/stop switch.
Conditions for Setting the DTC
B3123 02
The keyless entry control module detects a short to ground on the rear center console keyless entry antenna signal circuit.
B3123 05
The keyless entry control module detects a short to B+ or an open on the rear center console keyless entry antenna signal circuit.
Action Taken When the DTC Sets
Vehicle will not detect the transmitter in some locations inside the vehicle. If the transmitter is not detected then vehicle will not change ignition
modes when start/stop button is pressed.
Conditions for Clearing the DTC
* A current DTC will clear when the conditions for setting the DTC are no longer present.
* A history DTC will clear after 40 malfunction-free ignition cycles.
Reference Information
Schematic Reference
Remote Function Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Keyless Entry/Keyless Entry
Transmitter/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Keyless Entry System Description and Operation (without ATH) (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Keyless
Entry/Description and Operation/Keyless Entry System (without ATH))Keyless Entry System Description and Operation (with ATH) (See:
Accessories and Optional Equipment/Antitheft and Alarm Systems/Keyless Entry/Description and Operation/Keyless Entry System (with ATH))
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 harness connector at the T10K center console rear keyless entry antenna.
2. Ignition ON, test for less than 1 V between the signal circuit terminal 1 and ground.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K84 keyless entry
control module.
3. Ignition OFF, install a DMM between the signal circuit terminal 1 and ground. Set the DMM to capture DC voltage using the MIN MAX
function.
4. Activate the antenna by pressing the ignition mode switch. Verify the MAX voltage captured by the DMM is OL or is greater than.5 V.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the K84 keyless entry control module.
