dk2: Check VAF Sensor
| Steps | _Key Off
_Check for unmetered air leaks between vane meter and throttle body _Disconnect processor 60 pin connector. Inspect for damaged pins, corrosion, loose wires, etc. Service as necessary _Install breakout box _Connect processor to breakout box _DVOM on 20 volt scale _Key On, engine Off _Place new unsharpened pencil as shown. _Measure voltage between Test Pins 43 (Test Pin 27 on 2.3L TC) and Test Pin 46 at the breakout box. |
| Result | Is voltage between 2.8 volts and 3.7 volts? |
| Direction | YES
Vane meter is capable of outputting an acceptable signal. The Code 26 has been caused by incorrect engine speed, an unmetered air leak (vacuum leak), or the canister purge solenoid (1.9L EFI only). Service as necessary. Remove breakout box. Rerun Quick Test NO Remove breakout box. Replace VAM. Rerun Quick Test. |
| Component | Vane Airflow Meter |
| Description | The VAM measures air flowing into the engine. The meter contains a movable vane directly connected to a potentiometer.
Air, rushing through the VAM, changes the position of the vane and the potentiometer. The potentiometer relays vane position information to the EEC. The EEC can then translate vane position information into the volume of air flowing into the engine The VAM also contains an air temperature sensor. The sensor constantly monitors the temperature of the air flowing into the engine and reports the information to the EEC. The EEC computes volumetric airflow and air temperature, then adjusts the fuel flow to obtain the optimum air/fuel ratio. |
| Location | Mounted between the air cleaner and turbo inlet |
| Wire Colors | White with Black stripe
Light Green with Purple stripe Orange with White stripe Black with White stripe |
| Image |  |