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Engine Control Relay (Accent, ELANTRA & TIBURON)

  1. Relay is located behind left side of dash. Disconnect relay from harness connector and remove relay from holder. Apply battery voltage to relay terminal No. 4 and ground terminal No. 2. See Fig 1.
  2. Check for continuity between relay terminals No. 1 and 5, and No. 3 and 5. If continuity exists, go to next step. If continuity does not exist, replace relay.
  3. Measure voltage between ground and relay harness connector terminals No. 4 and 5. If 12 volts does not exist on both terminals, go to next step. If 12 volts exists, go to step 7).
  4. Turn ignition off. Measure resistance between Blue fusible Link "B" and relay harness connector terminals No. 4 and 5. If resistance is less than 2 ohms, go to next step. If resistance is more than 2 ohms, repair open in wire between relay and fusible link "B".
  5. Check for continuity between ground and relay harness connector terminals No. 4 and 5. If continuity does not exist, go to next step. If continuity exists, repair short to ground in wire between relay and fusible link "B".
  6. Remove Blue fusible link "B" from underhood relay/fuse box. Check continuity across fusible link. If continuity exists, reinstall fusible link and go to next step. If continuity does not exist, replace fusible link and retest.
  7. Turn ignition off. Disconnect ECM harness connector. Measure resistance between relay harness connector terminal No. 2 and ECM harness connector terminal No. 27. See Figure. If resistance is less than 2 ohms, go to next step. If resistance is more than 2 ohms, repair open in wire between relay and ECM.
  8. Check for continuity between ground and relay harness connector terminal No. 2. If continuity does not exist, go to next step. If continuity exists, repair short to ground in wire between relay and ECM.
  9. Reconnect ECM harness connector. Check continuity between ground and relay harness connector terminal No. 2 with ignition on and engine off. If continuity does not exist, check transaxle range switch input. See TRANSAXLE RANGE SWITCH. If transaxle range switch is okay, replace ECM. If continuity exists, ensure all connectors are secure and retest.
Fig 1: Checking Engine Control Relay (Accent, Elantra & Tiburon)
G93C80327Courtesy of HYUNDAI MOTOR CO.
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