Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSHYUNDAI2000SONATA BASE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM & COMPONENT TESTINGRELAYSECM CONTROL RELAY (SONATA 2.5L)
2000 Hyundai Sonata Base, Automatic
ECM Control Relay (Sonata 2.5L)
2000 Hyundai Sonata Base, AutomaticSECTION ECM Control Relay (Sonata 2.5L)
- Turn ignition off. Disconnect 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 exists, go to next step. If continuity does not exist, replace ECM control relay.
- Using a fused jumper wire, apply battery voltage to relay terminal No. 4. Using another jumper wire, connect relay terminal No. 2 to ground. Check for continuity between relay terminals No. 1 and 5. If continuity exists, go to next step. If continuity does not exist, replace ECM control relay.
- Remove battery voltage and ground from ECM control relay. Check for continuity between relay terminals No. 1 and 5. If continuity does not exist, go to next step. If continuity exists, replace ECM control relay.
- Turn ignition off. Measure voltage between ground and 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 (30-amp) fuse located in engine compartment junction block.
- Turn ignition off. Check for an open or short in Blue wire between ECM relay connector terminal No. 2 and ECM connector No. 94-2 terminal No. 23. See Figure. Perform repairs as necessary. If Blue wire is okay, go to next step.
- Turn ignition off. Check for an open or short in Pink wire between ECM relay connector terminal No. 5 and ECM connector No. 94-1 terminal No. 8. Perform repairs as necessary. If Pink wire is okay, inspection is complete.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.