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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Cellular, Entertainment, And Navigation >> Diagnostic Information and Procedures >> DTC B0004 >> Conditions for Setting the DTC

Conditions for Setting the DTC

The navigation radio compares the vehicle speed signal from the PCM to the GPS location signal every second. If the GPS signal indicates that the vehicle has traveled 4 km (2.5 mi) but no vehicle speed signal was received, the radio sets the DTC.

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