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Power Transistor

  1. Disconnect connector from power transistor. To check power transistor for cylinders No. 1 and 4, apply 1.5 volts between power transistor terminals No. 3 (negative) and No. 4 (positive). See Fig 1 .
  2. Using analog ohmmeter, check continuity between terminals No. 3 (positive) and No. 5 (negative). With voltage applied to terminal No. 4, continuity should exist. With voltage removed from terminal No. 4, continuity should not exist.
  3. To check power transistor for cylinders No. 2 and 3, apply 1.5 volts between power transistor terminals No. 2 (positive) and No. 3 (negative). Using analog ohmmeter, check for continuity between terminals No. 1 (negative) and No. 3 (positive). With voltage applied to terminal No. 2, continuity should exist. With voltage removed from terminal No. 2, continuity should not exist.
Fig 1: Checking Power Transistor (Elantra)
G92E24921Courtesy of HYUNDAI MOTOR CO.
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