How to test a MAF sensor
Oct 17, 2009 at 12:24 PM
2000 Pontiac Grand Prix MAF sensor
2000 PONTIAC GRAND PRIX
LANGREN18
- MEMBER
- 1 POST
- FOLLOW
Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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Inspect for dust or contaminants on the sensor
Using an ohmmeter, measure the resistance between terminals THA and E2. Resistance: At -20 °C (-4 °F) 13.6 - 18.4 KOhm At 20 °C (68 °F) 2.21 - 2.69 KOhm At 60 °C (140 °F) 0.49 - 0.67 KOhm
Inspect the intake air flow meter operation.
Connect the intake air flow meter connector.
Turn the ignition switch to ON.
Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
Blow air into the intake air flow meter, and check that the voltage fluctuates.
Using an ohmmeter, measure the resistance between terminals THA and E2. Resistance: At -20 °C (-4 °F) 13.6 - 18.4 KOhm At 20 °C (68 °F) 2.21 - 2.69 KOhm At 60 °C (140 °F) 0.49 - 0.67 KOhm
Inspect the intake air flow meter operation.
Connect the intake air flow meter connector.
Turn the ignition switch to ON.
Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
Blow air into the intake air flow meter, and check that the voltage fluctuates.
Oct 18, 2009 at 7:17 PM
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