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Home >> Hyundai >> 2016 >> Sonata Plug-In Hybrid >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System Diagnosis (PHEV) >> DTC P1774: Speed Command PWM Line >> Component Inspection

Component Inspection

  1. Connect GDS and select "Diagnostic Trouble Codes (DTCs)" mode and then clear DTC.
  2. Operate the vehicle and monitor the DTC on the GDS.
  3. Are any DTCs present?
  4. Is measured resistance within specification?

    YES 

    • Substitute with a known-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM and then go to "Verification of Vehicle Repair " procedure.

    NO 

    • Fault is intermittent caused by poor contact of PCM/TCM and DTC was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair as necessary and go to "Verification Vehicle Repair " procedure.
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