For 1990-2009 cars only
Circuit Description
The sensing and diagnostic module (SDM) learns the source ID of the battery voltage report message. The SDM monitors this message every 300 milliseconds.
Conditions for Running the DTC
The SDM monitors the class 2 serial data line during the continuous monitoring for the battery voltage report.
Conditions for Setting the DTC
The battery voltage report indicates the battery voltage is below 9.5 volts and the CRANK mode is not active.
Action Taken When the DTC Sets
The SDM sets DTC B1327 and disables the following State Of Health (SOH) DTCs:
| • | DTC U1096 |
| • | DTC U1255 |
| • | DTC U1300 |
| • | DTC U1301 |
Conditions for Clearing the MIL/DTC
The SDM receives a battery voltage report message that the battery voltage is above 9.5 volts.
Diagnostic Aids
Refer to Charging System Check in order to diagnose a vehicle undercharging condition.
