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Home >> Jeep >> 2009 >> Liberty Limited, 4WD, Part Time >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Air Bag Restraint System - Electrical Diagnostics >> DTC Troubleshooting >> U0121-Lost Communication With Anti-Lock Brake System (Abs) Control Module >> Possible Causes
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Possible Causes

Possible Causes 
CAN INTERIOR OR CAN C BUS CIRCUITS OPEN OR SHORTED
DIAGNOSTIC TROUBLE CODES (DTC) RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES PRESENT
TOTALLY INTEGRATED POWER MODULE (TIPM) NOT CONFIGURED CORRECTLY
TOTALLY INTEGRATED POWER MODULE (TIPM) POWER AND GROUND
TOTALLY INTEGRATED POWER MODULE (TIPM)
ANTILOCK BRAKE SYSTEM (ABS)
OCCUPANT RESTRAINT CONTROLLER (ORC)