Vane Airflow Sensor Pinpoint Test DK

17-94 EEC-IV - Pinpoint Tests - All Vehicles
1989

Vane Airflow Sensor
Pinpoint Test DK


[NOTE]

You should enter this Pinpoint Test only when a Service Code 26, 56, 66 or 76 is received in Quick Test Step 3.0, 5.0, or 6.0.


Remember


To prevent the replacement of good components, be aware that the following non-EEC areas may be at fault:

^ Check for unmetered air (air leaks) between VAF meter and throttle body

^ Vacuum leaks

^ Engine sealing (PCV sealing, CANP, valve cover seal dipstick seated)

This Pinpoint Test is intended to diagnose only the following:

^ VAF meter (-12B529-)

^ Processor (-12A650-)

^ Harness circuits: VREF, VAF SIGNAL and SIGNAL RETURN




Pinpoint Test Schematic