Montero SR 4WD V6-3.5L SOHC (1997)
Examples of abnormal wave patterns
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Example 1
Cause of problem
Malfunction of sensor interface
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 it the volume air flow sensor is normal.