Toyota 3S-GE Repair Manual page 218

EG'2°4 ENGINE - EFI SYSTEM
To EFI Main Relay 4
ECU
!)+B
Oxygen
Sensor
I""""""""""""""""""""""""""""""" "a ox
: v
F1 OVF
QX VF1
'
El . - | ' = E| l D
E1 TE1
m"-I - n -i
_l
Olfi F" — l
—- m
1!
HT
Check Connector (SW) Check Connector (ST)
P17B22
(D I Q) There is no voltage between ECU terminals VF and E1.
ECU Check that there is voltage between ECU terminal VF and body
':':l:.':' 25 I I 9'°""d-
" 1 * NO Ioi<
Voltmeter ' v ' V
E1 I VFNIK W I Check wiring between ECU terminal E1 and body ground.
E, OK BAD BAD
- Try another ECU. Repair or replace.
mm ls air leaking into air induction
system?
BAD
Repair or replace.
2.}-
-1-iii-—' _
A
i IV
SST I OK I BAD I
Check distributor and_ignition Repair or |,ep|ace_
tie
"I1:
E1
E
K/is 1- < =' - i
<' \ "l
. I OK BAD
Example' ST202 ® Check spark plugs. (See page IG-9) Ii>I Repair or fep|a()e_ '
system. (See page IG 7)
I OK
Check fuel pressure
BAD A
Repair or replace
ll Ill OK
ll I TE1 - BAD Re air or re lace
|| | || Check lI'|]eCI0l'S (See page EG 237) Ii—>I p p
Check Connector (gee page E9205) ' I 'I I '
I I I OK BAD
E1 Check vacuum sensor. I I -
Voltmeter Repair or replace.
i (See page EG-280)
OK
II.'i!| l
. SST Check operation of oxygen OK
V I ® sensor. (See page EG—286) system "°'ma"
I BAD
Check wiring between oxygen
Check Connector ¢..,\ __|| d ECU
-= l sensor an .
BAD
Repair wiring.
(1 @Ir VF1 IOK
-D \ I Replace oxygen sensor.
PO6331
PO6326
W%fl28