Circuit Description
The control modules on this vehicle monitor the battery voltage through the battery positive voltage circuits. This vehicle has multiple modules that will set this DTC. For more information on which modules , refer to Diagnostic Trouble Code (DTC) List - Vehicle
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B1327 Device Power Circuit Low
Conditions for Running the DTC
The DTC will only run if the affected module has power, ground, and the ignition is not in the START mode.
Conditions for Setting the DTC
| • | This DTC shall be set as current when the voltage falls below 9.0 volts for 1,200 milliseconds. |
| • | 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.
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 1,200 milliseconds.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Starting and Charging Schematics Connector End View Reference: Engine Electrical Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 |
Does the scan tool indicate the battery voltage is greater than the specified value? | 9.5 V | Go to Step 3 | Go to Battery Inspection/Test |
3 | Inspect for poor connections at the harness connector of the affected module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 5 | Go to Step 4 |
4 | Replace the affected module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 5 | -- |
5 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
