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 LIN communication line is short or No message from other unit, ECM sets DTC U1112.
Item
Detecting Condition
Possible Cause
DTC Strategy
Signal Monitoring
Open or short in LIN communication line
Enable Conditions
IG ON
Battery voltage 10~16V
Engine speed ? 500rpm
Threshold Value
LIN communication line is short or No message from other unit
Diagnostic Time
5sec
MIL ON Condition
NO MIL
Fig.1) Signal waveforms of battery sensor