Legacy Sedan 4WD F4-2.2L SOHC (1992)
Air Flow Meter/Sensor: Testing and Inspection
Air Flow Sensor Schematic
A faulty air flow sensor will set code 23 in the on-board diagnostic system. Refer to the schematic diagram and test the sensor with the diagnostic chart.
If an air flow sensor that is incorrect for the vehicle model is installed, code 49 will set (whether the sensor itself is faulty or not). Automatic
transmission models use a hot film type air flow sensor and manual transmission models use a hot wire type. These are not interchangeable.
Wire color code identification:
L:
Blue
B:
Black
Y:
Yellow
G:
Green
R:
Red
W: White
Br: Brown
Lg: Light green
Gr: Gray
Air Flow Sensor Diagnostic Chart
AIR FLOW SENSOR DIAGNOSTIC CHART