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 Descriptors

DTC B3109: Keyless Entry Transmitter 1 Low Battery
DTC B3110: Keyless Entry Transmitter 2 Low Battery
DTC B3111: Keyless Entry Transmitter 3 Low Battery
DTC B3112: Keyless Entry Transmitter 4 Low Battery

### Circuit/System Description

With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the remote control door lock receiver (RCDLR) along with the commanded keyless entry function.

### Conditions for Running the DTC

The keyless entry system must be enabled.

### Conditions for Setting the DTC

The DTC sets after 3 consecutive low battery signals from the same programmed transmitter.

### Action Taken When the DTC Sets

The keyless entry system is inoperative.

### Conditions for Clearing the DTC

The DTC is cleared when a normal transmitter voltage signal is received from any programmed transmitter.

### Reference Information

#### Schematic Reference

Remote Function Schematics

#### Connector End View Reference

Remote Function Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

• | Scan Tool Data List

• | Scan Tool Data Definitions

### Circuit/System Verification

Verify none of the following DTCs are set:

• | B3109

• | B3110

• | B3111

• | B3112

⇒ | If any of the DTCs are set, replace the battery in the applicable keyless entry transmitter. Operate the applicable transmitter 3 consecutive times. If any of the DTCs reset, replace the applicable keyless entry transmitter.

### Repair Instructions

Important: This vehicle may be equipped with the 2-Way Advanced Remote Start System. Vehicle equipped with the 2-Way Advanced Remote Start System can be identified by an LCD screen on the keyless entry transmitter or a yellow label on the RCDLR. When servicing the 2-Way Advanced Remote Start System, ensure that the correct parts are installed during replacement. Service parts for the 2-Way Advanced Remote Start System can be found in the Accessory section of the parts manual.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Transmitter Battery Replacement

• | Transmitter Programming