Toyota 4-Runner 1985 Repair Manual page 208

EFI SYSTEM - Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter
FI-39
I
No.
Terminals Trouble
Condition
STD Voltage
.J
THA - E2 No voltage
Ignition switch Intake air temperature 20°C
2 - 6 V
ON
(68°F)
"
+8
C
THA
~
THA
<.E
~
E2
E2
ECU
Air Flow Sensor
(Air Flow Meter)
EOl
-~
-
I~r-L-J' "'L-I 1r
L~I
!
Fe
i
EIIE2 ivslVc IVs
ITHAI
IIE.,INolqsTAlvFINswIlF""1 WiT Iml'G'1
I
IKNKIN·II I I vol v, IT"A~A!'l°·dl
IIE",!"o2<j'G,/Ed HAC,,! ITsw/ iE,lo·lv«lvTAIT""f1 I IE" lowolspolB'Kj
o·JI
W
c:J
w
FI0605
CD
No voltage between ECU terminals THA and E
2 •
(lG S/W ON)
~
Check that there is voltage between ECU terminal +B and
body ground. (IG S/W ON)
OK NO
@
Check air thermo sensor.
I
Refer to section 1.
BAD
OK
Replace air flow Check wiring between ECU and air
meter. thermo sensor.
OK BAD
Try another ECU.
Repair or replace
wiring.
Air Flow Meter