2010 Cadillac CTS Sedan AWD V6-3.6L Page 566

2010 Cadillac CTS Sedan AWD V6-3.6L Page 566

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 rear compartment keyless entry antenna.

2. Ignition ON, verify a test lamp does not illuminate between the signal circuit terminal A and ground.

瀚慖f the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the RCDLR.

3. Install a DMM between the signal circuit terminal A and the low reference circuit terminal B. Set the DMM to capture AC voltage using the

MIN MAX function.

4. Press the rear compartment lid release switch. Verify the DMM captured an AC voltage signal.

瀚慖f an AC voltage was not captured, test the signal circuit and the low reference circuit for a short to ground or an open/high resistance. If

the circuits test normal, replace the RCDLR.

5. If all circuits test normal, test or replace the rear compartment keyless entry antenna.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning) for RCDLR replacement, setup, and programming

B3122

DTC B3122

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 B3122 00

- Keyless Entry Antenna 4 Performance - Console Active Antenna

Diagnostic Fault Information

Circuit/System Description

The console active antenna is located in the center console and is used to establish low frequency (LF) communications with the keyless entry

transmitter The keyless entry console active antenna is only used when the console passive antenna was unable to locate a transmitter within the