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 DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - SELF-DIAGNOSTICS - 2.4LDIAGNOSTIC TESTSDTC P0102: MASS OR VOLUME AIR FLOW CIRCUIT LOW INPUTINSPECTION/REPAIRW/HARNESS INSPECTIONSIGNAL CIRCUIT INSPECTION

2002 Hyundai Santa Fe Base, Automatic

Signal Circuit Inspection

2002 Hyundai Santa Fe Base, AutomaticSECTION Signal Circuit Inspection

Check for short to ground in harness.
1. Ignition "OFF".
2. Disconnect MAF sensor connector and PCM connector.
3. Measure resistance between terminal 1 of MAFS harness connector and chassis ground.
  Specification: Infinite
  
  Fig 1: Measuring Resistance Between Terminal 1 Of MAFS Harness Connector And Chassis Ground
4. Is the measured resistance within specifications?
  YES
  - Go to " 2 Check for open in harness" as below.
  NO
  - Check short to ground in signal harness.
  - Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check for open in harness.
1. Ignition "OFF".
2. Disconnect MAFS and PCM connector and PCM connector.
3. Measure resistance between terminal 1 of MAFS harness connector and terminal 15/C21-2 of PCM harness connector.
  Specification: Approx. below 1Ω
  
  Fig 2: Measuring Resistance Between Terminal 1 Of MAFS Harness Connector And Terminal 15/C21-2 Of PCM Harness Connector
4. Is the measured resistance within specifications?
  YES
  - Go to "COMPONENT INSPECTION " procedure.
  NO
  - Check open in harness between MAFS connector and PCM connector.
  - 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.