Montero SR 4WD V6-3.5L SOHC (1997)
Air Flow Meter/Sensor: Oscilloscope Patterns and Waveforms
Wave Pattern Inspection Using an Analyzer
Measurement method
(1) Disconnect the volume air flow sensor connector, and connect the special tool (test harness: MB991348) in between. (All terminals should be
connected.)
(2) Connect the analyzer special patterns pickup to terminal.
(3) of the volume air flow sensor connector.
Alternative method (when test harness is not available)
Connect the analyzer special patterns pickup to ECM terminal (90).
Standard wave pattern Observation Conditions
Standard wave pattern
Observation conditions (Pattern changes with engine speed changes)
Wave pattern observation points
Check that cycle time T becomes shorter and the frequency increases when the engine speed is increased.
