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DTC Detection Logic

DTC DETECTING CONDITION CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
U0164 Lost communication with Unified meter and A/C amp. When ECM is not transmitting or receiving CAN communication signal of OBD (emission related diagnosis) with Unified meter and A/C amp. for 2 seconds or more.
  • CAN communication line between Unified meter and A/C amp. and ECM
  • Can communication line open or shorted
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