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
1. Read the value the using Techstream (MAF).
NOTE:
- 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 power switch ON (ACC).
2. Turn the power switch ON (do not run the engine).
3. Turn the Techstream ON.
4. Select the following menu items: Powertrain / Engine / Data List / MAF.
5. Wait 30 seconds, and read the values on the Techstream.
Standard condition:

Less than 0.64 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 (see DTC P2237 OXYGEN (A/F) SENSOR PUMPING CURRENT CIRCUIT / OPEN (BANK 1 SENSOR 1); DTC P2238 OXYGEN (A/F) SENSOR PUMPING CURRENT CIRCUIT LOW (BANK 1 SENSOR 1); DTC P2239 OXYGEN (A/F) SENSOR PUMPING CURRENT CIRCUIT HIGH (BANK 1 SENSOR 1); DTC P2240 OXYGEN (A/F) SENSOR PUMPING CURRENT CIRCUIT / OPEN (BANK 2 SENSOR 1); DTC P2241 OXYGEN (A/F) SENSOR PUMPING CURRENT CIRCUIT LOW (BANK 2 SENSOR 1); DTC P2242 OXYGEN (A/F) SENSOR PUMPING CURRENT CIRCUIT HIGH (BANK 2 SENSOR 1); DTC P2252 OXYGEN (A/F) SENSOR REFERENCE GROUND CIRCUIT LOW (BANK 1 SENSOR 1); DTC P2253 OXYGEN (A/F) SENSOR REFERENCE GROUND CIRCUIT HIGH (BANK 1 SENSOR 1); DTC P2255 OXYGEN (A/F) SENSOR REFERENCE GROUND CIRCUIT LOW (BANK 2 SENSOR 1); DTC P2256 OXYGEN (A/F) SENSOR REFERENCE GROUND CIRCUIT HIGH (BANK 2 SENSOR 1) ).