Toyota Supra 1990 Manual page 269

EFI SYSTEM - Air Induction System
FI-95
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REMOVAL OF AIR FLOW METER
1. DISCONNECT AIR FLOW METER CONNECTOR
2. DISCONNECT NO.2 AIR CLEANER HOSE
3. REMOVE AIR CLEANER CAP
Remove the two bolts and cap.
4. REMOVE AIR FLOW METER
FI1682
Pry off the lock plates, and remove the four nuts, and air
' - - - - - - - - - - - - - - - - - - - - ' flow meter.
[ Fe E1 E2 VS
I
a:::::::Da:::::::Da:::::::DICDa:::::::Da:::::::D1CJI
Measuring
Plate
/
F 10480
F 10449
FI1682
INSPECTION OF AIR FLOW METER
INSPECT RESISTANCE OF AIR FLOW METER
Using an ohmmeter, measure the resistance between each
terminal by moving the measuring plate.
Terminals Resistance
n
Measuring plate
opening
Infinity
Fully closed
Fe - E1
Other than
Zero
closed position
200 - 600
Fully closed
VS- E2
20 - 1,200
Fully open
HINT: Resistance between VS and E2 will change in a
wave pattern as the measuring plate slowly opens.
If the resistance is not as specified, replace the meter.
INSTALLATION OF AIR FLOW METER
1. INSTALL AIR FLOW METER
Install the air flow meter with the two new lock plates and
four nuts. Pry the lock plates on to the nuts.
2. INSTALL AIR CLEANER CAP
Install the cap with two bolts.
3. CONNECT NO.2 AIR CLEANER HOSE
4. INSTALL AIR FLOW METER CONNECTOR