On-Vehicle Inspection

NOTE:

Perform the MAF meter inspection according to the procedures below.
Only replace the MAF meter when the MAF value in the DATA LIST (with the engine stopped) is not within the normal operating range or there is foreign matter on the MAF meter platinum hot wire (heater).

INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

Read the value using the intelligent tester or Techstream (MAF).

NOTE:

Perform the inspection with the vehicle indoors and on a level surface.
Perform the inspection of the MAF meter while it is installed to the air cleaner case (installed to the vehicle).
During the test, do not use the exhaust air duct to perform suction on the exhaust pipe.

Turn the power switch ON (IG) (do not run the engine).
Turn the tester on
Enter the following menus:
- Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / MAF B1 or MAF B2.
- Techstream - Select: Powertrain / Engine and ECT / Data List / All Data / MAF Bank 1 or MAF Bank 2.

Wait 30 seconds, and read the values on the intelligent tester or Techstream.

Standard

STANDARD CHART

Item	Condition	Specified Condition
MAF B1 (MAF Bank 1)	Engine not running Wait 30 seconds after power switch is turned on (IG)	Below 0.31 g/sec.
MAFB2 (MAF Bank 2)	Engine not running Wait 30 seconds after power switch is turned on (IG)	Below 0.35 g/sec.

If the result is not as specified, replace the MAF meter sub-assembly.

If the result is within the specified range, inspect the MAF meter.