Vane Airflow Sensor (VAF): Overview

Vane Airflow Sensor

(VAF)
Pinpoint

Test DK
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.

^ Processor.

^ Harness circuits: VREF, VAF SIGNAL and SIGNAL RETURN.