Function test

• Connect diagnostic tester; see DIAGNOSTIC TESTER, CONNECTING .
• Start engine and let run at idle.
• Under address word 33, select "Diagnostic mode 1: Check measured values."
• Select the measuring value "PID 16: Air flow quantity at Mass Air Flow (MAF) sensor".
• Check specified value of air flow quantity at Mass Air Flow (MAF) Sensor at idle.

Specified value: 2.80 to 5.30 g/sec

• End diagnosis and switch ignition off.

If specified value is obtained, but DTC memory has a DTC concerning Mass Air Flow (MAF) sensor:

• Check voltage supply of Mass Air Flow (MAF) sensor, see VOLTAGE SUPPLY FOR MASS AIR FLOW (MAF) SENSOR, CHECKING .

If specified value is not obtained:

• Check signal and Ground (GND) wires of Mass Air Flow (MAF) sensor, see CHECKING SIGNAL AND GROUND WIRES OF MASS AIR FLOW (MAF) SENSOR .