Air Flow Meter
- Connect ohmmeter across pins 26 and 33 in control unit connector. Resistance should be 280-400 ohms. If not, disconnect harness at meter and check resistance between pins 34 and 33. See Fig 1 . Resistance should be 280-400 ohms. If not correct, repair harness or replace air flow meter.
- Connect ohmmeter across pins 33 and 31 in control unit connector. Resistance should measure any value between infinity and zero. If not, disconnect harness at meter and check resistance between pins 34 and 32. If okay at meter, repair harness. If not, replace air flow meter.
- Connect 1 lead of ohmmeter to ground and other lead to connector pin 26, then 31, then 33 on control unit. Infinite resistance should be shown in all cases. If not, replace air flow meter.
- Operate air flow meter flap by hand to ensure it moves smoothly without binding. If okay, meter is functioning properly. If not, replace air flow meter.