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Pinpoint Test A : U0121: Notes

DTC Fault Trigger Condition-PCM 

DTC Description Fault Trigger Conditions
U0121 Lost Communication With Anti-Lock Brake System (ABS) Control Module The PCM sets this DTC if data messages received from the ABS module over the High Speed Controller Area Network (HS-CAN) are missing.

Normal Operation and Fault Conditions 

REFER to: Communications Network .

Possible Sources 

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