For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category

### DTC Descriptor

DTC B3105: Keyless Entry System Key Not Programmed

### Circuit/System Description

DTC B3105 sets if the remote function actuator (RFA) has not learned any key.

### Conditions for Running the DTC

The RFA system must be enabled and a test is ran every time the key is cycled.

### Conditions for Setting the DTC

This code is set if there are no learned key in the RFA.

### Action Taken When the DTC Sets

The RFA system is inoperative.

### Conditions for Clearing the DTC

The code is cleared as current when at least one key is programmed to the RFA.

### Reference Information

#### Schematic Reference

Remote Function Schematics .

#### Connector End View Reference

Component Connector End Views .

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References

### Circuit/System Testing

1. Verify that the transmitter is the correct type for the vehicle.

⇒ | If it is not the correct transmitter, replace the transmitter.

2. Verify the scan tool KEY Programmed parameter is Yes.

⇒ | If not Yes, program the transmitter.

3. Using scan tool, verify transmitter is transmitting signal when each button is pressed.

⇒ | If scan tool fails to indicate signal from transmitter, replace transmitter battery.

⇒ | If scan tool indicates a signal from one or more button presses, replace the transmitter.

4. Replace the RFA module.

### Repair Instructions

Perform the Diagnostic Repair Verification .

Refer to Control Module References .