B151A

DTC B151A
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Diagnostic System Check - Vehicle
Review Strategy Based Diagnosis for an overview of the diagnostic approach. Strategy Based Diagnosis
Diagnostic Procedure Instructions provides an overview of each diagnostic category. Diagnostic Procedure Instructions

DTC Descriptor
DTC B151A 58: Low Battery Capacity Detected

Circuit/System Description
The body control module (BCM) monitors the battery voltage level during an engine crank event to detect a low battery voltage condition.

Conditions for Running the DTC
The vehicle is ON

Conditions for Setting the DTC
A minimum crank battery voltage is less than the minimum crank battery voltage threshold for 16 consecutive crank events.

Action Taken When the DTC Sets
A driver information center (DIC) message is displayed.

Conditions for Clearing the DTC
The DTC will clear if the minimum crank voltage is greater than the minimum crank voltage threshold during a crank event.

Reference Information
Schematic Reference
Starting and Charging Schematics [1][2]Electrical Diagrams

Connector End View Reference
Component Connector End Views Connector End Views By Name

Description and Operation
Charging System Description and Operation Description and Operation

Electrical Information Reference
Circuit Testing Circuit Testing
Connector Repairs Connector Repairs
Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
Wiring Repairs Wiring Repairs

Scan Tool Reference
Control Module References Control Module References for scan tool information

Circuit/System Verification
Before replacing the C1 battery perform the Battery Inspection/Test Battery Inspection/Test.