GM Service Manual Online
For 1990-2009 cars only

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

Circuit/System Description

This fault sets if the key 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

Control Module References

Circuit/System Testing

  1. Replace the batteries in the transmitter and with the scan tool clear the DTC.
  2. Operate the transmitter three consecutive times.
  3. If the DTC sets again, test the battery connections for an open/high resistance.
  4. If all circuits test normal, test or replace the transmitter.

Repair Instructions

Perform the Diagnostic Repair Verification .