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TR Sw The scan tool displays Park, Reverse, Neutral, Drive 5, Drive 4, Drive 3, Drive and Drive 1. DTC B1327 Circuit Description The control modules on this vehicle monitor system voltage through the battery positive voltage DTC Descriptor This diagnostic procedure supports the following DTC: DTC B1327 Device Power 1 Circuit Low Conditions for Running the DTC This DTC shall run only if the module has power, ground and the ignition is not in START mode. Conditions for Setting the DTC This DTC shall be set as current when the voltage falls below 9 volts for 1.2 seconds. When the vehicle exits START, the module shall delay checking the voltage for 2 seconds. Action Taken When the DTC Sets A message shall be sent out to notify all other modules of low battery voltage. The modules disable the setting of U codes and other DTCs. Conditions for Clearing the DTC The DTC will clear current status when the voltage is greater than 9.5 volts for 1.2 seconds. A history DTC will clear after 50 consecutive ignition cycles, if the condition for the Use a scan tool.
2007 Hummer H3 2007 ENGINE Engine Electrical - H3
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