MAF 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 1 in Fuse Panel C is 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 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 PRELIMINARY CHECK

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 warmed up, running at idle		2.00 to 5.00 g/sec

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

-- Fault may be intermittent. Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If the specified value was Not obtained: