DTC Confirmation Test "B" (Using Generic Scan Tool)

WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the following test to check overall function of MAF sensor circuit. During this test, 1st trip DTC may not be confirmed.

NOTE: If a DTC confirmation test has been previously performed, turn ignition off and wait at least 10 seconds before performing next DTC confirmation test.

Start engine and warm to normal operating temperature.
Select MODE 1 with scan tool.
Observe MAF reading on scan tool.
Check for MAF sensor signal value rise in response to increase to about 4000 RPM in engine speed.
If voltage does not increase as engine speed increases, go to DIAGNOSTIC PROCEDURE . If voltage increases as engine speed increases, system is okay at this time.