Air Flow Meter/Sensor: Testing and Inspection

3MZ-FE ENGINE CONTROL SYSTEM: MASS AIR FLOW METER: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. INSPECT MASS AIR FLOW METER
NOTICE:
- Perform the mass air flow (MAF) meter inspection by following the procedure 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).

(a) Read the values using the Techstream (MAF).
NOTICE:
- 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 an exhaust air duct on the exhaust pipe.
(1) Connect the Techstream to the DLC3.
(2) Put the engine in inspection mode Component Tests and General Diagnostics.
(3) Turn the power switch on (IG) (do not start the engine).
(4) Turn the Techstream main switch on.
(5) Select the following menu items: Powertrain / Engine and ECT / Data List / MAF.
(6) Wait 30 seconds, and read the value on the Techstream.
Standard condition:
Less than 0.69 g/s
If the result is not as specified, replace the MAF meter.