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 B3112: Keyless Entry Transmitter 4 or Generic Low Battery

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Keyless Transmitter 4 Low Battery | -- | -- | -- | B3112 00

### Circuit/System Description

This fault sets if the key fob programmed to slot 4 has a low battery.

### Conditions for Running the DTC

The remote function actuation (RFA) system must be enabled.

### Conditions for Setting the DTC

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

### Action Taken When the DTC Sets

The RFA system is inoperative.

### Conditions for Clearing the DTC

The code is cleared as current when a normal transmitter voltage signal is received from any programmed transmitter.

### 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

Scan Tool Data List

### Circuit/System Testing

1. Replace the batteries in the transmitter and with the scan tool clear the DTC.
2. Operate the transmitter 3 consecutive times.

⇒ | If the DTC sets again, test the battery.

3. If all circuits test normal, test or replace the transmitter.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.