Diamante Sedan V6-3.5L SOHC (1999)
Observation Conditions (pattern changes with engine speed changes.)
Wave Pattern Observation Points
Check to be sure that cycle time T becomes shorter and the frequency increases when the engine speed is increased.
Examples of Abnormal Wave Patterns
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Example 1
CAUSE OF PROBLEM
Sensor interface malfunction
WAVE PATTERN CHARACTERISTICS
Rectangular wave pattern is output even when the engine is not started.
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Example 2
CAUSE OF PROBLEM
Damaged rectifier or vortex generation column
WAVE PATTERN CHARACTERISTICS
Unstable wave pattern with non-uniform frequency. However, when an ignition leak occurs during acceleration,the wave pattern will be distorted
temporarily, even if the volume air flow sensor is normal.