1. Battery Sensor
LIN technology is , a serial communication system which is used for communicating only one signal, developed to substitute CAN network, Normally used for multi signal communiction. It is only single wire to make LIN communiction in order to make simple network that is not important speed.
In case of ISG system, ECM receives battery infromation such as battery voltage, current and temperature etc.) through the LIN.
With the information received through the LIN, ECM decides alternator control, idle stop and auto start by receiving battery information.
If it is impossible to communicate through internal or external CAN line over 500ms, ECM sets DTC U1111.
Item
Detecting Condition
Possible Cause
DTC Strategy
CAN communication check
Poor connection
Open/Short
Enable Conditions
Time after engine start = 2sec
Battery voltage = 11V
Threshold Value
Battery sensor error
Diagnostic Time
Continuous
MIL ON Condition
No MIL
Fig.1) Signal waveforms of battery sensor