Toyota MR2 1988 Repair Manual page 255

EFI SYSTEM - Troubleshooting EFI Electronic Circuit with Volt/Ohmmeter
Fl-59
No. Terminals Trouble
Condition
STD Voltage
10 IGT-
E1
No voltage
Idling
0.7- 1.0
v
ECU
F~e A~
To
Igniter w/
Tachometer
Fusible
~
AM2 7.5A Ignition
Ignition Coil
8
E""rf
Link
1.25B S/W ~
1' 1 :
Engine Main
'I
NE -r-
Relay
I
IGT
I
....I-
l___t-
r--
IGF
l
r
E1
~
Fl2938
CD
CD
There is no voltage between ECU terminaiiGT and E1.
1 (Idling)
(]) Check that there is voltage between ECU terminal IGT and
body ground. (Idling)
NO
~OK
F10342
I
Check wiring between ECU terminal E1 and
body ground.
.BAD
Refer to No. 1
!BAD
1
Repair or replace
(See page Fl-69)
I
OK
Check wiring between ECU and
BAD
distributor.
Repair or replace
OK
BAD
1
Replace
Check distributor.
I
OK
Fl1143
Check wiring between ECU and
BAD
Igniter.
Repair o.r replace
OK
BAD
Check igniter. (See page IG-4) 1 Repair or replace
OK
Try another ECU.
I