Toyota 3F-E - Inspection of Diagnosis Circuit

NO
BAD
FI-26
EFI SYSTEM —
Diagnosis System
I
NSPECTION OF DIAGNOSIS CIRCUIT
Fusible Link
Fuse
ECU
0 BATT
+B1
0+ B
I
G SW
EFI
Main Relay
MAIN 0.85R
0.5G
AM1
I
gnition
EFI 15A
Switch
I
G1
0
—
"CHECK" Engine
0M-REL
Warning Light
Fuse
AM2
IG2
GAUGE 7.5A
0.5G
0
I
GN 7.5A
Battery
Check
Connector
F12435
1.
YES
OK
Does "CHECK" engine warning light come on
when ignition switch is at ON?
System Normal
YES
NO
Does "CHECK" engine warning light come on
when ECU terminal W is grounded to the body?
Check wiring between
ECU terminal El and
body ground.
Try another
ECU.
2.
Check bulb, fuse and wiring between ECU and
ignition switch.
YES
Repair or replace.
BAD
Repair or replace.
Does "CHECK" engine warning light go off
when the engine is started?
System Normal
V
NO
BAD
Check wiring between ECU and "CHECK"
engine warning light.
Repair.
OK
NO
Is there diagnostic code output when check
connector terminals TE1 and El are connected
circuited?
Check wiring between ECU terminal T and
check connector terminal TE1, and ECU
terminal El and check connector terminal El.
NO
YES
OK
Does "CHECK" engine warning light go out
after repair according to malfunction code?
Further repair required.
Try another
ECU.
YES
Cancel out diagnostic code.
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