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 MANUALSHYUNDAI2005ELANTRA GLS, 4D HATCHBACK, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEMSFUEL SYSTEMDTC TROUBLESHOOTING PROCEDURESDTC P0118: ENGINE COOLANT TEMPERATURE CIRCUIT HIGH INPUTSIGNAL CIRCUIT INSPECTION

2005 Hyundai Elantra GLS, 4D Hatchback, Automatic

Signal Circuit Inspection

2005 Hyundai Elantra GLS, 4D Hatchback, AutomaticSECTION Signal Circuit Inspection

Check for open in signal circuit.
1. Measure resistance between terminals 1 of the sensor harness connector and 31 of the PCM harness connector.
  Specification: Approx. 0Ω
  
  Fig 1: Measuring Resistance Between Terminals 1 Of Sensor Harness Connector And 31 Of PCM Harness Connector
  Courtesy of HYUNDAI MOTOR CO.
2. Is resistance within the specification?
  YES
  - Go to next step as below
  NO
  - Repair as necessary and go to VERIFICATION OF VEHICLE REPAIR procedure.
Check for short to battery in signal circuit.
1. Ignition "ON" & Engine "OFF".
2. Measure voltage between terminals 1 of the sensor harness connector and 31 of the PCM harness connector.
  Specification: Approx. 0V
  
  Fig 2: Measuring Voltage Between Terminals 1 Of Sensor Harness Connector And 31 Of PCM Harness Connector
  Courtesy of HYUNDAI MOTOR CO.
3. Is voltage within the specification?
  YES
  - Go to TERMINAL AND CONNECTOR INSPECTION procedure.
  NO
  - Repair as necessary and go to VERIFICATION OF VEHICLE REPAIR 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.