B3105

DTC B3105

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructionsprovides an overview of each diagnostic category.

DTC Descriptor
DTC B3105 00
- Keyless Entry System Transmitters

Circuit/System Description

The body control module (BCM) monitors the number of keyless entry transmitters programmed. Until at least one transmitter is programmed, the BCM determines a malfunction condition exists.

Conditions for Running the DTC

The BCM has been set up without transmitters being programmed.

Conditions for Setting the DTC

No keyless entry transmitter programmed to the BCM.

Action Taken When the DTC Sets

The keyless entry system is inoperative.

Conditions for Clearing the DTC

A current DTC is cleared when at least one transmitter has been programmed to the BCM.

Reference Information
Schematic Reference

Remote Function Schematics [1][2]Electrical Diagrams
Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1 A4
Description and Operation

Keyless Entry System Description and Operation Description and Operation
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module Referencesfor scan tool information

Circuit/System Verification

Attempt to program a transmitter. Refer to Replacing Keys Replacing Keys. The transmitter should program.

Circuit/System Testing

1. Verify that the transmitter is the correct transmitter for the vehicle. This can be accomplished by comparing the part number printed on the transmitter to the appropriate part number in the parts catalog.

• If not correct, replace the transmitter.

2. Attempt to program the transmitter. Refer to Replacing Keys Replacing Keys. The transmitter should program.

• If the transmitter does not program, replace the transmitter.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Control Module Referencesfor BCM replacement, setup, and programming