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dk90: Continuous Code 56: Check VAF Sensor
Steps _Enter Key On Engine Off Continuous Monitor mode. Refer to Appendix in Section 16.
_Observe VOM or STAR LED for indication of a fault while performing the following:
_Lightly tap on VAF sensor (simulate road shock)
_Wiggle VAF connector
Result Is a fault indicated?
Direction YES

Disconnect and inspect connectors. If connector and terminals are good, replace VAF sensor. Clear Continuous Memory Code. Refer to Appendix in Section 16. Rerun Quick Test.


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VAM Information:
ComponentVane Airflow Meter
DescriptionThe 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.
LocationMounted between the air cleaner and turbo inlet
Wire ColorsWhite with Black stripe
Light Green with Purple stripe
Orange with White stripe
Black with White stripe