2010 Cadillac Truck SRX FWD V6-3.0L Page 627

2010 Cadillac Truck SRX FWD V6-3.0L Page 627

Circuit/System Verification

Verify DTC B3122, B3123, or B3124 is not set.

If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic

Trouble Code (DTC) List - Vehicle).

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the T10G rear fascia 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. Lock the vehicle using the keyless entry transmitter.

5. 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 signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the K84 keyless entry control module.

6. 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.

7. Lock the vehicle using the keyless entry transmitter.

8. 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.

9. If all circuits test normal, replace the T10G rear fascia keyless entry antenna. Verify DTC B3121 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 - Rear Bumper Fascia (See: Accessories and Optional Equipment/Antitheft and Alarm

Systems/Keyless Entry/Antenna - Keyless Entry/Service and Repair/Ignition Lock Key Transmitter Antenna Replacement - Rear Bumper

Fascia)

* Control Module References (See: Testing and Inspection/Programming and Relearning)for keyless entry control module 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 02

- Keyless Entry Antenna 4 Short to Ground

DTC B3122 05

- Keyless Entry Antenna 4 High Voltage/Open

Diagnostic Fault Information