mitsubishi Workshop Repair Guides

Mitsubishi Workshop Service and Repair Manuals

Fuel Delivery and Air Induction|Fuel > < Air Flow Meter/Sensor|Locations|Page 3094
Page 2
background image

Standard Wave Pattern

Observation conditions

Rev engine, observe T1 and T2 remain equal.

Wave Pattern Observation Points

Check that cycle time T becomes shorter and the frequency increases when the engine speed is increased.

Examples of Abnormal Wave Patterns

Example 1

Cause of problem

-

Sensor interface malfunction.

Wave pattern characteristics

-

Rectangular wave pattern is output even when the engine is not started.

Example 2

Cause of problem

-

Damaged rectifier or vortex generation column.

Wave pattern characteristics

-

Unstable wave pattern with non-uniform frequency. An ignition leak will distort the wave pattern temporarily, even if the volume airflow sensor is
normal.

Fuel Delivery and Air Induction|Fuel > < Air Flow Meter/Sensor|Locations|Page 3094