B1327

DTC B1327

Circuit Description

The module has an internal voltage sensor with a dedicated circuit that checks the battery positive voltage and battery negative circuit voltage to determine if it is between 9-15.9 volts.

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 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 via class 2 and may illuminate the charge indicator.

Conditions for Clearing the MIL/DTC

* In order to clear the DTC from a current status the voltage shall be greater than 9.54 volts for 2 seconds.
* DTC may be cleared with a scan tool.

Test Description

Step 1 - Step 9:

The numbers below refer to the step numbers on the diagnostic table.
3. Tests for the proper operation of the complete circuit.
4. Tests for the proper operation of the battery positive voltage circuit.