Air Flow Meter/Sensor: Testing and Inspection

2GR-FE ENGINE CONTROL SYSTEM: MASS AIR FLOW METER: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION
NOTICE:
- Perform the MAF meter inspection according to the procedures below.
- Only replace the MAF meter when both the LONG FT#1 value and MAF value in the DATA LIST (with the engine stopped) are not within the normal operating range.

1. INSPECT MASS AIR FLOW METER
(a) Read the value using the Techstream (MAF).
NOTICE:
- Turn off the engine.
- 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.
(1) Turn the ignition switch to ACC.
(2) Turn the ignition switch ON (do not run the engine).
(3) Turn the Techstream ON.
(4) Select the following menu items: Powertrain / Engine and ECT / Data List / MAF.
(5) Wait 30 seconds, and read the values on the Techstream.
Standard condition:
Less than 0.55 g/sec.

- If the result is not as specified, replace the MAF meter.
- If the result is within the specified range, inspect the cause of the extremely rich or lean air-fuel ratio P0171.