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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Engine Mechanical >> Starter >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> DTC B1424 >> Circuit/System Description

Circuit/System Description

The Passkey III+ theft deterrent module (TDM) monitors the battery positive (B+) voltage available to it. If the voltage at the TDM is between 6-9 volts, and the voltage being reported by a low speed GMLAN serial data message is greater than 9 volts, then DTC B1424 00 sets.