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Home >> Dodge and Ram >> 2023 >> ProMaster 2500 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 3.6L - DTCS U0404 To U140A >> DTC Troubleshooting >> U1120-Lost Wheel Distance Message >> Theory Of Operation

Theory Of Operation

The Powertrain Control Module (PCM) receives wheel speed and wheel distance CAN C bus messages from the Anti-Lock Brake System (ABS) module.

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