2010 Cadillac CTS Sedan AWD V6-3.6L Page 562

2010 Cadillac CTS Sedan AWD V6-3.6L Page 562

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 LF door handle 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. Perform the Driver Front Exterior Zone special functions test. 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 LF door handle assembly.

Repair Instructions

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

* Front Side Door Outside Handle Replacement (Front and Rear Doors with ATH) (See: Body and Frame/Doors, Hood and

Trunk/Doors/Front Door/Front Door Handle/Front Door Exterior Handle/Service and Repair)Front Side Door Outside Handle Replacement

(Front Door with ATH) (See: Body and Frame/Doors, Hood and Trunk/Doors/Front Door/Front Door Handle/Front Door Exterior

Handle/Service and Repair)Front Side Door Outside Handle Replacement (Without ATH) (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 RCDLR 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 00

- Keyless Entry Antenna 2 Performance - RF Door Antenna

Diagnostic Fault Information