Sonata (2.5L)

2000 Hyundai Sonata Base, AutomaticSECTION Sonata (2.5L)
  1. Remove ECM control relay which is mounted to right side of instrument panel center support, under radio. Using a fused jumper wire, apply battery voltage to relay terminal No. 4. Using another jumper wire, ground relay terminal No. 2. See Fig 1.
  2. With relay energized, check for continuity between relay terminals No. 1 and 5. Continuity should exist until voltage is disconnected. Replace relay if continuity does not exist.
Fig 1: Identifying ECM Control Relay Terminals
G95H30962Courtesy of HYUNDAI MOTOR CO.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.