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Home >> Fiat >> 2012 >> 500c Lounge >> Repair and Diagnosis >> Transmission >> Automatic Trans >> (Transmission Control Module (TCM) - Electrical Diagnostics) >> Diagnosis And Testing >> U0121-Lost Communication With Anti-Lock Brake System (Abs) Control Module >> Possible Causes
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Possible Causes

Possible Causes 
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
BRAKING SYSTEM MODULE (BSM) POWER AND GROUND
BCM NOT CONFIGURED CORRECTLY
BRAKING SYSTEM MODULE (BSM)
MODULE THAT SET THIS DTC
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