Test Step 3 - Check the LIN Bus Circuit

Fig 1: Switch Window Door Lock C1 Connector

Courtesy of AUDI OF AMERICA, LLC

• Measure the voltage between the LIN bus circuit and the driver window switch sense return circuit.

Is the voltage more than 8.0 volts?

No 

• Go to Test Step 5 - Driver Window Switch Sense Return Circuit Open 

Yes 

• Go to Test Step 4 - LIN Bus Circuit Short to Voltage