Function test

• Connect diagnostic tester. Refer to Diagnostic tester, connecting 
• Start engine and let run at idle.
• Depress accelerator pedal to approx. 1500 RPM.
• Under address word 33, select "Diagnostic mode 1: Check measured values."

• Select 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: 4.5 to 9.0 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. Refer to Voltage supply for Mass Air Flow (MAF) sensor, checking  .

If specified value is not obtained:

• Check wires to Engine Control Module (ECM) according to wiring diagram. Refer to Check wires to control module  .