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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 65 (Automatic Transaxle System Diagnosis (HEV)) >> DTC P1774: Speed Command PWM Line >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • Monitoring voltage range (Circuit open/short check)
 OPU: Oil pump unit
  1. Circuit open or short
  2. PCM/TCM
Enable Conditions
  • C-CAN BUS Off or OPU CAN Time out
  • 10V ≤ Battery voltage
Threshold Value
  • Signal low (Short ground)
  • Signal high (Short power)
  • Open circuit
Diagnostic Time
  • More than 0.2sec.
Fail safe
  • Prohibit EOP control
  • UD, LR slip control 1st~3rd
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