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 B310D 00: Keyless Entry Transmitter 6 Low Battery
DTC B310E 00: Keyless Entry Transmitter 7 Low Battery
DTC B310F 00: Keyless Entry Transmitter 8 Low Battery

### Circuit/System Description

#### With RPO ATG

With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the body control module (BCM) along with the commanded keyless entry function.

#### With RPO ATS

When starting the vehicle, a message containing the current battery state of the transmitter is sent to the body control module (BCM).

### Conditions for Running the DTC

#### With RPO ATG

A keyless transmitter button is pressed.

#### With RPO ATS

Ignition ON.

### 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 the programmed transmitter that set the DTC.

### Reference Information

#### Schematic Reference

Remote Function Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Keyless Entry System Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

Verify none of the following DTCs are set:

• | DTC B310D

• | DTC B310E

• | DTC B310F

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

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Transmitter Programming