Toyota 4A-FE Repair Manual page 102

EFI SYSTEM - Diagnosis System Fl-33
1 . Does "CHECK ENGINE" warning light come on YES
System Normal.
when ignition switch is at ON?
-
NO
•
Does "CHECK ENGINE" warning light come on YES
Check wiring between
OK Try another
EC U terminal E 1 and
-
when ECU terminal W is grounded to the body?
body ground.
ECU.
NO
BAD
1•
Check bulb, fuse and wiring between ECU and
Repair or replace.
ignition switch.
BAD
Repair or replace.
Does "CHECK ENGINE" warning light go off YES
System Normal.
when the engine is started?
2.
NO
Check wiring between ECU and "CHECK ENGINE"
BAD
Repair.
warning light.
NO
I
Is there diagnostic code output when check NO
Check wiring between ECU terminal TE1 and
check connector terminal TE1, and ECU terminal
connector terminals TE1 and E1 connected?
E1 and check connector terminal E1.
YES
OK
,,
Does "CHECK ENGINE" warning light go out after NO
Further repair required.
Try another
repair according to malfunction code? ECU.
YES
System OK
I
Cancel out diagnostic code.
I