GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Caprice WM 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC B2484

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 B2484 00: Global Positioning System Sensor Open Circuit

Circuit Description

The GPS antenna is connected to the navigation module with a coaxial cable. The navigation module polls the data from the GPS antenna once every second. The GPS antenna is powerd a 5 volt reference from the radio via the coaxial cable.

Conditions for Running the DTC
    • The ignition must be in the RUN or ACC position.
    •  The system voltage is at least 9.5 volts and no more than 15.5 volts.
    • All the above conditions are present for greater than 1 second.

Conditions for Setting the DTC
    • The navigation module determines there is an open in the GPS antenna.
    • All the above conditions are present for greater than 1 second.

Actions Taken When the DTC Sets
    • Unable to get GPS location updated, the radio uses the last reported position and the vehicle speed signal to calculate the vehicle position.
    • Route guidance may be inaccurate.
    • This failure has no effect outside the navigation system.

Conditions for Clearing the DTC
    • The navigation module detects the presence of a GPS antenna.
    • A history DTC clears after 50 fault-free ignition cycles.

Reference Information

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Navigation System Description and Operation

Electrical Information Reference

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

Circuit/System Testing

Note: The global positioning system (GPS) requires a clear line of sight to the sky to operate properly. In most cases the GPS will not have reception near tall buildings or inside structures.

  1. Turn ON the ignition. Disconnect the GPS coaxial cable from the navigation module. Verify there is 4-5.5 volts between the center conductor and the shield of the coaxial cable.
    2. ⇒If 4-5.5 volts is not present, replace the navigation module.
  2. If all circuits test normal, replace the GPS antenna.

Repair Instructions

Perform the Diagnostic Repair Verification.

    •  Electronic Navigation Antenna Replacement
    •  Control Module References for navigation module replacement, setup, and programming.