DTC B2483 or B2484. Saturn Astra 2008

For 1990-2009 cars only

Makes 🢒 Saturn 🢒 2008 🢒 Astra 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 DTC B2483 or 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 Descriptors

DTC B2483: GPS Sensor Circuit Low

DTC B2484: GPS Sensor Circuit Open

The vehicle communication interface module (VCIM) receives information from a specific GPS antenna located on the outside of the vehicle. The GPS antenna is connected to the VCIM via a shielded coaxial cable. The antenna cable also provides a path for DC current for powering the antenna.

Conditions for Running the DTC

•	Ignition is in the RUN or ACC position.

•	Battery voltage is between 9-16 volts.

Conditions for Setting the DTC

B2483 00

The VCIM detects a short to ground on the GPS antenna signal circuit.

B2484 00

The VCIM detects an open/high resistance on the GPS antenna signal circuit.

Action Taken When the DTC Sets

•	The OnStar® status LED turns red.

•	The OnStar® Call Center cannot locate the vehicle.

Conditions for Clearing the DTC

•	The condition responsible for setting the DTC no longer exists.

•	A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Circuit/System Testing

Disconnect the harness connector at the radio antenna.
Ignition OFF, test for less than 10 ohms between the terminal 4 outer shield and ground.

⇒	If greater than the specified range, test the antenna coax shield for an open/high resistance. If the coax tests normal, replace the VCIM.

Ignition ON, test the terminal 4 center terminal for 4.5-5.5 volts.

⇒	If greater than the specified range, test the antenna coax center terminal for a short to voltage. If the coax tests normal, replace the VCIM.

⇒	If less than the specified range, test the antenna coax center terminal for a short to ground or an open/high resistance. If the coax tests normal, replace the VCIM.

If all circuits test normal, replace the antenna.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Radio Antenna Replacement

•	Antenna Cable Replacement

•	Control Module References for VCIM replacement, setup, and programming