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 MANUALSHYUNDAI2002SANTA FE BASE, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - SELF-DIAGNOSTICS - 2.4LDIAGNOSTIC TESTSDTC P0102: MASS OR VOLUME AIR FLOW CIRCUIT LOW INPUTINSPECTION/REPAIRW/HARNESS INSPECTIONPOWER SUPPLY CIRCUIT INSPECTION

2002 Hyundai Santa Fe Base, Automatic

Power Supply Circuit Inspection

2002 Hyundai Santa Fe Base, AutomaticSECTION Power Supply Circuit Inspection

Check Power Supply.
1. Ignition "OFF".
2. Disconnect MAFS connector.
3. Ignition "ON" & Engine "OFF".
4. Measure voltage between terminal 4 of MAFS harness connector and chassis ground.
  Specification: Approx. B+
  
  Fig 1: Measuring Voltage Between Terminal 4 Of MAFS Harness Connector And Chassis Ground
5. Is the measured voltage within specifications?
  YES
  - Go to " 2 Check MAFS Power" as below.
  NO
  - Check that Fuse is installed or blown off between control relay and MAF sensor.
  - Check open in harness between control relay and MAF sensor.
    Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check MAFS Power.
1. Ignition "OFF".
2. Disconnect MAFS connector.
3. Ignition "ON" & Engine "OFF".
4. Measure voltage between terminal 2 of MAF sensor harness connector and chassis ground.
  Specification: Approx. 5V
  
  Fig 2: Measuring Voltage Between Terminal 2 Of MAF Sensor Harness Connector And Chassis Ground
5. Is the measured voltage within specifications?
  YES
  - Go to "SIGNAL CIRCUIT INSPECTION " procedure.
  NO
  - Check open in harness between control relay and MAF sensor.
  - Repair or replace as necessary and then, 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.