2010 Cadillac Truck SRX FWD V6-3.0L Page 629

2010 Cadillac Truck SRX FWD V6-3.0L Page 629

1. Ignition OFF, disconnect the harness connector at the T10J center console front 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.

5. Install a DMM between the signal circuit terminal 1 and the low reference circuit terminal 2. Set the DMM to capture DC voltage using the

MIN MAX function.

6. Activate the antenna by pressing the rear closure touch pad. Verify the MAX voltage captured by the DMM is greater than.5 V.

瀚慖f less than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K84

keyless entry control module.

7. If all circuits test normal, replace the T10J center console front keyless entry antenna. Verify DTC B3122 is not set.

瀚慖f the DTC is set, replace the K84 keyless entry control module.

Repair Instructions

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

* Ignition Lock Key Transmitter Antenna Replacement - Instrument Panel (See: Accessories and Optional Equipment/Antitheft and Alarm

Systems/Keyless Entry/Antenna - Keyless Entry/Service and Repair/Ignition Lock Key Transmitter Antenna Replacement - Instrument Panel

)

* Control Module References (See: Testing and Inspection/Programming and Relearning)for keyless entry control module replacement, setup,

and programming

B3123

DTC B3123

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 B3123 02

- Keyless Entry Antenna 5 Short to Ground

DTC B3123 05

- Keyless Entry Antenna 5 High Voltage/Open

Diagnostic Fault Information

Circuit/System Description

The rear center console antenna is located in rear of the center console assembly and is used to establish low frequency communications with the

keyless entry transmitter. When the driver attempts to change the ignition status of the vehicle, the keyless entry control module communicates with

the rear center console antenna.