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 MANUALSHYUNDAI1990EXCEL BASE, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGFUEL SYSTEMCONTROL RELAY TESTSCONTROL RELAY 3.0L
1990 Hyundai Excel Base, 4D Sedan, Standard
Control Relay 3.0L
1990 Hyundai Excel Base, 4D Sedan, StandardSECTION Control Relay 3.0L
- Disconnect electrical connector. Using an ohmmeter, check continuity between relay terminals No. 3 and 4, and terminals No. 1 and 6. See Fig 1 . If continuity is not present, go to next step. If continuity is present, control relay is defective.
- Check resistance between terminals No. 3 and 9. Approximately 95 ohms resistance should be present. Check resistance between terminals No. 7 and 10. Approximately 35 ohms resistance should be present. Check continuity between terminals No. 6 and 8, then reverse leads. Continuity should exist in one direction only. If continuity is not as specified, control relay is defective.
- Apply battery voltage across terminals No. 7 (positive) and No. 10 (negative), while checking continuity between terminals No. 3 and 4. If continuity is present, control relay is okay. If continuity is not present, replace control relay.
- Apply battery voltage across terminals No. 6 (positive) and No. 8 (negative), while checking voltage on terminals No. 1 and 2. If battery voltage is present, control relay is okay. If battery voltage is not present on terminals No. 1 and 2, replace control relay.
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.