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Home >> Dodge and Ram >> 2017 >> Challenger GT >> Repair and Diagnosis >> External Pages >> Different car >> Section 81 (Adaptive Front Lighting System Module - Electrical Diagnostics) >> DTC Troubleshooting >> U0121-00-Lost Communication With Antilock Brake System (Abs) Control Module >> When Monitored:
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When Monitored:

WARNING: This page is about a different car, the 2012 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

Continuously when the ignition is on.

The battery voltage between 10 and 16 volts.

Body Control Module (BCM) is configured correctly.