B1327

DTC B1327

Circuit Description

The control modules on this vehicle monitor system voltage through the battery positive voltage circuits. Damage to components, and incorrect data can occur when the voltage is out of range. This vehicle has multiple modules that will set this DTC. For more information on which modules refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code Descriptions

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. This DTC shall execute regardless of the battery voltage.

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 malfunction is no longer present.
* Use a scan tool.

Test

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Step 12: