Diamante V6-2972cc 3.0L SOHC (1992)
Air Flow Meter/Sensor: Testing and Inspection
Volume Air Flow Sensor
SYMPTOMS
Engine Stalls occasionally, crank engine while shaking the air flow sensor harness. If the engine stalls, suspect a bad connection at the air flow
sensor.
If the air flow sensor output frequency is other than - when the ignition switch is turned on (but the engine is not turning, suspect a faulty air flow
sensor or engine control module.
If the engine can be run, even though the air flow sensor output frequency is out of specification, suspect problem is not air flow sensor.
LOCATION
Air Flow Sensor located inside the air cleaner housing proceed as follows.
Test Connection
OSCILLOSCOPE TESTING PROCEDURES
1.
Run engine at idle speed.
2.
Engine coolant temperature should be at: 85-95°C (185-205°F), with no electrical accessory loads on.
3.
Connect the input probe of the oscilloscope, to the pickup point shown in the circuit diagram, and check the wave form.
If scope pattern is not as depicted in image, continue with the rest of the test procedures before replacing the assembly.
