Mass Air Flow Sensor, Checking: Notes

NOTE:

Use only gold-plated terminals when servicing terminals in harness connector of Mass Air Flow (MAF) Sensor -G70-.

Special tools and workshop equipment required

Test requirements

The Mass Air Flow (MAF) Sensor -G70- fuse OK.
Battery voltage at least 12.5 volts.
All electrical consumers such as, lights and rear window defroster, switched off.
Vehicles with automatic transmission, shift selector lever into position "P" or "N".
A/C switched off.
Ground (GND) connections between engine/transmission/chassis OK.
Coolant Temperature at least 80° C.
Ignition switched off.

Test procedure

-- Perform a preliminary check to verify the customers complaint. Refer to GENERAL DIAGNOSIS .

Start diagnosis

-- Connect the scan tool.

-- Start engine and let it run at idle.

-- Using the scan tool, Check the air flow quantity of the Mass Air Flow (MAF) Sensor -G70- at idle:

Diagnostic text		Specified value
Air flow quantity at Mass Air Flow (MAF) sensor
Engine running at idle		2.00 to 5.00 g/sec

-- End diagnosis and switch ignition off.

If the specified value was obtained, but the DTC memory has a DTC concerning the Mass Air Flow (MAF) Sensor -G70- :

-- Check the voltage supply of the Mass Air Flow (MAF) Sensor -G70-.

If specified value was not obtained:

-- Check the wiring of the Mass Air Flow (MAF) Sensor -G70-.