On-Vehicle Inspection

INSPECT MASS AIR FLOW METER




a. When using the hand-held tester:

Inspect operation.
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. Blow air into the MAF meter, and check that the air flow value of the CURRENT DATA changes.

If operation is not as specified, check the MAF meter, wiring and ECM.




b. When not using the hand-held tester:

Inspect operation.
1. Turn the ignition switch ON.
2. Connect the positive tester probe of the voltmeter to terminal VG of the ECM, and the negative tester probe of the voltmeter to terminal E2G of the ECM.
3. Blow air into the air flow meter, and check if the voltage fluctuates.

If operation is not as specified, check the MAF meter, wiring and ECM.