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Home >> Hummer >> 2009 >> H3 Base, Automatic >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> DTC B1492 >> Circuit/System Description

Circuit/System Description

The generator battery control module (GBCM) and the engine control module (ECM) monitor the generator through the generator field duty cycle signal circuit. The signal is a pulse width modulation (PWM) signal of 128 Hz. Normal duty cycle is 5-99 percent.

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