LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hyundai >> 2004 >> Santa Fe Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Engine Controls - System & Component Testing) >> Relays >> Engine Control Relay >> Sonata (2.7L)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Sonata (2.7L)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 Hyundai XG350, 2003 Hyundai Tiburon, 2003 Hyundai Sonata, 2003 Hyundai Santa Fe, and 2003 Hyundai Elantra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Disconnect PCM/ECM control relay harness connector and remove relay. Relay is mounted behind center console, under radio. Check for continuity between relay terminals No. 2 and 4. See Figure. If continuity is present, go to next step. If continuity is not present, replace PCM/ECM control relay. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary.
  2. Using a fused jumper wire, apply battery voltage to relay terminal No. 4. Using another fused jumper wire, connect relay terminal No. 2 to ground. Check for continuity between relay terminals No. 1 and 5. If continuity is present, go to next step. If continuity is not present, replace PCM/ECM control relay.
  3. Remove battery voltage and ground from PCM/ECM control relay. Check for continuity between relay terminals No. 1 and 5. If continuity is not present, go to next step. If continuity is present, replace PCM/ECM control relay.
  4. Turn ignition off. Measure voltage between ground and PCM/ECM control relay harness connector terminals No. 1 (Orange wire) and No. 4 (Orange wire). If battery voltage is present, go to next step. If battery voltage is not present, repair open or short in Orange wire between relay and MAIN fuse (30-amp) located in engine compartment junction block. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary.
  5. Turn ignition off. Check for an open or short in Blue wire between engine control relay connector terminal No. 2 and PCM/ECM connector No. C94-2 terminal No. 23. See Figure. Perform repairs as necessary. If Blue wire is okay, test is complete.
  6. Turn ignition off. Check for an open or short in Pink wire between engine control relay connector terminal No. 5 and PCM/ECM connector No. C94-1 terminal No. 8. Perform repairs as necessary. If Pink wire is okay, inspection is complete. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary.
scientia non olet · About LEMON Manuals