2010 Cadillac CTS Sedan AWD V6-3.6L Page 567
interior of the vehicle. This may be due to a keyless entry transmitter battery being low or RF/LF interference.
When a valid transmitter is placed into the pocket located in the center console, and either the brake pedal is depressed or the ignition control knob
is pressed, the console active antenna broadcasts a challenge to the transmitter. This causes a low frequency coupling to occur between the
transmitter and the console active antenna. If the response from the transmitter is a valid response, and all of the security requirements are met, the
vehicle's engine will start, or be allowed to go into accessory mode.
Conditions for Running the DTC
The console active antenna is activated.
Conditions for Setting the DTC
An internal failure is seen at the console active antenna.
Action Taken When the DTC Sets
* The security indicator will be illuminated.
* The Driver Information Center will display "Service Keyless Start".
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 50 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)
Description and Operation
Keyless Entry System Description and Operation (with RPO Y41) (See: Accessories and Optional Equipment/Antitheft and Alarm
Systems/Keyless Entry/Description and Operation/Keyless Entry System Description and Operation (with RPO Y41))Keyless Entry System
Description and Operation (without RPO Y41) (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Keyless
Entry/Description and Operation/Keyless Entry System Description and Operation (without RPO Y41))
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 Testing
1. Ignition OFF, disconnect the harness connector at the console active antenna.
2. Ignition OFF, test for less than 20 ohms between the low reference circuit terminal 5 and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the
RCDLR.
3. Ignition ON, test for B+ between the supply voltage circuit terminal 2 and ground while commanding the scan tool Active Antenna output
control ON.
瀚慖f not the specified value, test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the RCDLR.
4. Ignition OFF, disconnect the X2 harness connector at the RCDLR.
5. Ignition ON, verify a test lamp does not illuminate between the following circuits and ground:
* Signal circuit terminal B
* Signal circuit terminal C
