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Home >> Jeep >> 2012 >> Grand Cherokee Laredo, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Active Cruise Control (Acc) Module - Electrical Diagnostics >> DTC Troubleshooting >> U0121-00-Lost Communication With Anti-Lock Brake Module >> Possible Causes

Possible Causes

Possible Causes 
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
TOTALLY INTEGRATED POWER MODULE POWER AND GROUND
TIPM NOT CONFIGURED CORRECTLY
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
TOTALLY INTEGRATED POWER MODULE (TIPM)
MODULE THAT SET THIS DTC