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Chrysler
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2009
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300 Signature Series
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Repair and Diagnosis
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Accessories & Equipment
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Communication Devices
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(Drivetrain Control Module (DTCM) - Electrical Diagnostics)
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DTC Troubleshooting
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U0121-Lost Communication With Abs
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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
TIPM NOT CONFIGURED CORRECTLY
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE POWER AND GROUND
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
MODULE THAT SET THIS DTC