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 MANUALSTOYOTA2005CELICA GT-S, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSSFI SYSTEMMASS AIR FLOW (MAF) METERINSPECTION

2005 Toyota Celica GT-S, Standard

Mass Air Flow (MAF) Meter: Inspection

2005 Toyota Celica GT-S, StandardSECTION Inspection

INSPECT MAF METER RESISTANCE

Using an ohmmeter, measure the resistance between terminals THA and E2.

Resistance:

MAF METER TERMINALS RESISTANCE

Terminals	Resistance	Temperature
THA - E2	13.6 - 18.4 kΩ	-20°C (-4°F)
THA - E2	2.21 - 2.69 kΩ	20°C (68°F)
THA - E2	0.49 - 0.67 kΩ	60°C (140°F)

If the resistance is not as specified, replace the MAF meter.

Fig 1: Measuring Resistance Between MAF Terminals THA & E2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT MAF METER OPERATION
1. Connect the MAF meter connector.
2. Turn the ignition switch to ON.
3. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
  
  Fig 2: Connecting Tester Probe To Terminal VG & Terminal E2G
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Blow air into the MAF meter, and check that the voltage fluctuates.
  If operation is not as specified, replace the MAF meter.
5. Turn the ignition switch LOCK.
6. Disconnect the MAF meter connector.

RENDER: 1.0x

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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.