Page text (OCR transcript)
FI-44
EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GE)
No.
Terminals
Trouble
Condition
STD Voltage
9
ISC1~ISC4—E1
No voltage
Ignition switch ON
9—14 V
EFI Main Relay
ECU
Fuse
EFI 15A
ISC1
ISC2
ISC3
ISC4
Fusible
Link
AM2 30A
Fusible
Link
MAIN 2.0L
+B
+B1
M.REL
Battery
E1
FI4653
ISC1
ISC2
ISC3
ISC4
ECU
Voltmeter
V
FI4859
ECU
+B
+B1
Voltmeter
V
FI0312
S2
S1
B2
B1
Battery
FI1643
1
There is no voltage between ECU terminals ISC1 ~ ISC4 and
E1. (IG SW ON)
2
Check that there is voltage between ECU terminal +B (+B1)
and body ground. (IG SW ON)
OK
NO
Refer to No. 1.
(See page FI-36)
Check wiring between ECU terminal E1 and body ground.
OK
BAD
3
Check ISC valve.
(See page FI-106)
Repair or replace.
BAD
OK
Replace ISC
Check wiring between ECU and EFI
valve.
main relay.
OK
BAD
Try another ECU.
Repair or replace.
