Talon AWD L4-1997cc 2.0L DOHC Turbo VIN F SMFI (1997)
Air Flow Meter/Sensor: Testing and Inspection
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.
2. Observation conditions:
Function
Special patterns
Pattern height
Low
Pattern selector
Display
Engine RPM
Idle
WAVE PATTERN OBSERVATION POINTS
Check to be sure that cycle time T becomes shorter and the frequency increases when the engine speed is increased.
Examples of abnormal wave patterns
^
Example 1
Cause of problem: Sensor interface malfunction
Wave pattern characteristics: Rectangular wave pattern is output even when the engine is not started.
