Circuit/System Description

Hybrid/EV Battery System Verification 

After major internal A4 Hybrid/EV Battery Pack repairs the technician may use the EL-50332  Hybrid/EV Battery Service Tool to verify proper cell group voltage and temperature connection/operation prior to installing the battery pack cover and/or installing the battery pack into the vehicle.

The EL-50332  Hybrid/EV Battery Service Tool communicates with the battery energy control module through the A4 Hybrid/EV Battery Pack low voltage connectors. The tool displays battery cell group voltages for the 96 battery cell groups along with the calculated voltage difference between the highest and lowest readings. The tool also displays the temperatures read by the thermistors located within the battery sections.