2010 Cadillac Truck SRX FWD V6-3.0L Page 623

2010 Cadillac Truck SRX FWD V6-3.0L Page 623

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

Note: The A24D driver exterior door handle assembly has two harness connectors. Of these two harness connectors, make sure that only the

T10M driver door handle keyless entry antenna harness connector is disconnected. Disconnecting both harness connectors will result in the

inability to activate the antenna and cause an improper diagnosis.

1. Ignition OFF, disconnect the harness connector at the T10M driver door handle 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 doors using the keyless entry transmitter.

5. Activate the antenna by pulling the driver exterior door handle. 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 doors using the keyless entry transmitter.

8. Activate the antenna by pulling the driver exterior door handle. 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.

Note: Install the A24D driver exterior door handle assembly and verify correct system operation BEFORE painting the assembly. If the

assembly does not correct the concern, return the unpainted part.

9. If all circuits test normal, replace the A24D driver exterior door handle assembly. Verify DTC B3119 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.

* Front Side Door Outside Handle Bracket Replacement (See: Body and Frame/Doors, Hood and Trunk/Doors/Front Door/Front Door

Handle/Front Door Exterior Handle/Service and Repair)

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

and programming

B3120

DTC B3120

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 B3120 02

- Keyless Entry Antenna 2 Short to Ground