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.
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HOMESERVICE MANUALSHYUNDAI2005SANTA FE GLS, 2.7 D, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM DIAGNOSIS (2.7L) (1 OF 2)DTC TROUBLESHOOTING PROCEDURESDTC P0118: ENGINE COOLANT TEMPERATURE CIRCUIT HIGH INPUTMONITOR SCAN TOOL DATA
2005 Hyundai Santa Fe GLS, 2.7 D, AWD
Monitor Scan Tool Data
2005 Hyundai Santa Fe GLS, 2.7 D, AWDSECTION Monitor Scan Tool Data
- Ignition "ON" & Engine "OFF"
- Disconnect ECTS connector
- Connect Scan tool and monitor the "COOLANT TEMP. SNSR (V)" parameter on the Scan tool data list.
- Jumper the terminals 1 and 3 of the ECTS harness connector together.
Specification: Approx. 0V
- Is ECTS parameter within the specification?
YES
- Possibility of sensor malfunction. Go to "COMPONENT INSPECTION " procedure.
NO
- Go to next step.
- Jumper the terminal 3 of the ECT sensor harness connector to chassis ground.
- Observe the "ECT SENSOR" parameter on the Scan tool.
Specification: Approx. 0V
- Is ECT data within the specification?
YES
- Possibility of open in ECTS ground circuit. Go to "GROUND CIRCUIT INSPECTION " procedure.
NO
- Possibility of open or short to battery in ECTS signal circuit. Go to "SIGNAL CIRCUIT INSPECTION " procedure.
RENDER: 1.0x
NO RELATED
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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.