On-Vehicle Inspection

ON-VEHICLE INSPECTION

CHECK MASS AIR FLOW METER (MAF meter)

NOTICE:
- Perform the MAF meter inspection by following 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.

a. Perform confirmation driving pattern.




1 Connect the hand-held tester to the DLC3.
2 Turn the ignition switch ON.
3 Turn the tester on.
4 Clear the DTCs.
5 Start the engine and warm it up with all accessory switches off (until the engine coolant temperature is 75°C (167°F) or more).
6 Drive the vehicle at 31 mph (50 km/h) or more for 3 to 5 minutes. *1
7 Allow the engine to idle for 2 minutes. *2




8 Perform steps *1 and *2 at least 3 times.

b. Read value using the hand-held tester (LONG FT#1).
1 Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / LONG FT#1.
2 Read the values displayed on the tester.
Standard value: Within -15 to +15%
If the result is not within the specified range, perform the inspection below.

c. Read value using the hand-held tester (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 off the engine (do not run the engine).
2 Turn the ignition switch ON.
3 Turn the tester on.
4 Select the following menu items: DIAGNOSIS ENHANCED OBD II / DATA LIST / PRIMARY / PRIMARY / MAF.
5 Wait 30 seconds, and read the values on the hand- held tester.
Standard condition: Less than 0.48 g/s
- 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.