Summit L4-1795cc 1.8L SOHC (1995)
Air Flow Meter/Sensor: Oscilloscope Patterns and Waveforms
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 No. 3.
ALTERNATE METHOD (TEST HARNESS NOT AVAILABLE)
1. Connect the analyzer special patterns pickup to engine control module terminal No. 70.
OBSERVATION CONDITIONS
Function
Special Patterns
Pattern height
Low
Pattern selector
Display
Engine RPM's
Idle Speed
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.