• 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.

For symptom byte information, refer to Symptom Byte List.

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, along with the commanded keyless entry function. The remote control door lock receiver sends this to the body control module to perform the requested function.

A keyless transmitter button is pressed.

Three consecutive low battery signals are received from the same transmitter.

The keyless entry system is inoperative.

The DTC is cleared when a normal transmitter voltage signal is received from the transmitter that set the DTC.

Remote Function Schematics

Master Electrical Component List

Keyless Entry System Description and Operation

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

Control Module References for scan tool information

1. Verify none of the DTCs listed below are set:
• DTC B310D
• DTC B310E
• DTC B310F
• If any of the DTCs are set
1. Replace the battery in the appropriate keyless entry transmitter and operate the transmitter three consecutive times.
2. Verify the DTC does not set.
• If the DTC sets, replace the keyless entry transmitter.
• If the DTC does not set
3. All OK.
• If none of the DTCs are set
2. All OK.