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Home >> Hyundai >> 2017 >> Sonata Plug-In Hybrid >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (3 Of 3) >> DTC U0456: Invalid Data Received From Coolant Temperature Control Module >> Wiring Inspection >> Signal Circuit Inspection

Signal Circuit Inspection

■ Check CAN communication line Open 

  1. IG "OFF". Disconnect the connectors related to the CAN communication.
  2. Measure resistance between High signal terminal of PCM and EWP.
  3. Measure resistance between Low signal terminal of PCM and EWP.

    Specification:  Approx. 0Ω

  4. Is the measured resistance within specification?

    YES 

    • Go to next step below.

    NO