eagle Workshop Repair Guides

Eagle Workshop Service and Repair Manuals

Component Tests and General Diagnostics|Page 4786 > < Component Tests and General Diagnostics|Page 4784
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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.

Component Tests and General Diagnostics|Page 4786 > < Component Tests and General Diagnostics|Page 4784