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Home >> Jeep >> 2014 >> Compass Limited, AWD, Automatic CVT Trans >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> (Transmission Control Module (TCM) - Electrical Diagnostics - CVT Automatic Transmission) >> DTC Troubleshooting >> U0121-Lost Communication With Antilock Brake Module >> When Monitored
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When Monitored

Ignition on in the run position with a system voltage between 9.0 and 16.0 volts.

IOD fuse is installed or vehicle odometer is over 80 kilometers (50 miles).

No CAN C BUS DTCs present.