Eclipse Spyder GS-T L4-1997cc 2.0L DOHC Turbo MFI (1998)
Air Flow Sensor: Oscilloscope Patterns and Waveforms
VOLUME AIR FLOW SENSOR 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 volume air flow sensor connector terminal 3.
ALTERNATE METHOD (TEST HARNESS NOT AVAILABLE)
1. 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 to be sure that cycle time T becomes shorter and the frequency increases when the engine speed is increased.
