Air Intake System; Air Flow Meter - Toyota 4-Runner 1985 Repair Manual

FI-56
EFI SYSTEM -
Air Intake System
Potentiometer
~~
AIR INTAKE SYSTEM
Air Flow Meter
Compensation Plate
To air intake
chamber
C7
AIR
CLEANER
SIDE
Compensation Plate
From
W
Air By-pass Passage
air cleaner Measuring Plate
r--------------------l
, I
I I
Measuring Plate
Air By-pass Passage
ON-VEHICLE INSPECTION
MEASURE RESISTANCE OF AIR FLOW METER
(a) Unplug the wiring connector from the air flow met
(b) Using an ohmmeter, measure the resistance between
each terminal.
Between
Resistance Temperature
terminals
E2 -
Vs 20 -
400n
-
E2 -
Vc 100 - 300
n -
E2 - VB 200 - 400 n
-
E2 - THA 10 - 20
Kg
-20
o
e (
-4°F)
4 -
7
Kg
OOC ( 32°F)
2 - 3
Kn
20°C ( 68°F)
0.9 - 1.3
Kn
40°C (104°F)
0.4 - 0.7
Kn
60°C (140°F)
E1 - Fc Infinity
-
If not within specification, replace the air flow meter.
REMOVAL OF AIR FLOW METER
1. DISCONNECT AIR HOSES
2. DISCONNECT AIR FLOW METER CONNECTOR
3. REMOVE AIR FLOW METER
Remove the bolt and three nuts.