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Home >> Fiat >> 2013 >> 500e >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Telematics Control Unit - Electrical Diagnostics - 500E >> Diagnosis And Testing >> U0140-00-Lost Communication With Body Control Module >> Possible Causes

Possible Causes

Possible Causes
CAN B OR CAN C BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
MODULE THAT SET THIS DTC
WARNING:

On vehicles equipped with the high voltage system, you must thoroughly read and follow all High Voltage Safety procedures. In addition, before performing any diagnostic or service procedure near a high voltage component, you must perform the High Voltage Power Down. Refer to ELECTRIC VEHICLE CONTROL SYSTEM, STANDARD PROCEDURE . Failure to follow these instructions may result in possible serious or fatal injury.

NOTE: When performing any key-on procedure you must charge the 12 volt battery with a setting of 20 amps minimum or the High Voltage Battery could discharge below recommended manufacture specifications and destroy the battery cells.