Toyota 4-Runner 1985 Repair Manual page 201

FI-32
No.
3
EFI SYSTEM - Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter
Terminals
ECU
Trouble
Condition
STD Voltage
Throttle valve open
4 -lOV
No voltage
Ignition
switch ON
Throttle valve fully closed
Throttle valve fully open
0.1 - 1.0 V
4-5V
Throttle Position Sensor
E2
IDL
VTA
Vee
FI0124
o
Ol~
o
FI0607
ICD
I@
4-6V
ECU
E2
IDL
VTA
Vce
EOl
There is no voltage between ECU terminals IDL and E 2 .
(IG S/W ON) (Throttle valve open)
Check that there is voltage between ECU terminal +Bl or +8
and body ground. (lG S/W ON)
NO
~
OK
FI048S
FlooOS
I
Check wiring between ECU terminal El and body
ground.
BAD
I Replace or repair.
,
I
l
BAD
J
Refer to No.1
r
I
Replace or repair.
OK
~
I
®
Check throttle position sensor.
I
BAD
BAD
OK
I Replace or repair throt-I
I
Check wiring between ECU and
tie position sensor.
throttle position sensor.
OK
I Try another ECU.
I
1
I
I
1
I
I