Toyota 4A-F Repair Manual page 85

DIAGNOSTIC CODES (TCCS ECU w/o Air Flow Meter)
mb r
e o
N
u
CHECK ENGINE
blink.
,
OFF
2
JUJ uUiJLJUIJL
J
JlJIILLJ11JULJU
•
IJlJlJUULJJlJlJ LlJ I
,
WUlIUULJUUUUI
,
,
,
JUlJUUU UU JlJLJUI
'0
JlJlJlJlJ I ILIJlJlJUL J I
"
EFI SYSTEM
f
Sy t.m
..
NOnTIal
-
m
V
c
e uu
sensor signal
Ignilion
signal
-
mp.
Wlltllf t
&
sensor sigl'l81
RPM sign�1
,
-
T hro le
u
posilion
sensor signat
Inrak" lIir
lemp. sen so.
signal
Vehicle speed
sensor signnl
-
Starter signal
signal
Sw,tch
-
DiagnoSis System
Di8gooli.
appeal'S wh.n non" 01
This
the codes 12 Ihru
other
Open
shon circuit i
o r
�acuum ,ensor ,ignal.
from igniter
No \lignal
lOur times
in succession
. .
-_ . . - .
Open sh
c"cu,t in
Or
0< t
watM t"mp. unoor
signal.
No signal to
NE. G
•
within twerel secO<lds
..
after engine is cranked,
,
NE signal 10 ECU
• NO
,
,
th" engine speed is 8b
Open or short circuit
in IhrOll1e position
sensor signal.
Oplln
o r
short creuir
in intake eir
temp. ,,,n50r ,ignal.
•
Engine rpm is between
2,000 - 5,500 rpm.
lemp. is 80·C
Water
•
1176"f) o. mo.e.
ManifoLd pt"ssur"
•
certain �alue
o r more
v"hicle speed
continues
al km/h 10. HCood5
0
or mo,e.
No STA signal ECU
10
vehicle stopped and ertgine
over 600 rpm.
A" cond,tloner sw,tch ON.
idle switch O F h
F 0' S
s during
po ition in 0 range
diagnosis check.
Troubl
1 1 )
1 . Vacuum SenSOr circuit
n
2. Vacuum SenSOr
3. ECU
1 . Ignilion c
1+6. IGF, IGT)
Igniter
2.
3. ECU
1. e temp.
W t
a r
ir uit
c c
Wat"r temp. o"nso<
2.
J <CU
CU
E
1. Distributor CirCuit
Distributor
2
3. Igniter
when
4. ta l e r ,ignal circuit
S
r
e
o
v
5. ECU
1 . Throttl e position
$IInso. Circuit
2, Throttle pos�ion sensor
3. ECU
Intake air lemp. 5"n.:lOr
I .
,
circuit
,
•
2. ECU
,
Vehi l
, c e spee
circuit
;
" B
2. Vehicl" speed senSOr
and
3. ECU
1 . relav cn:\Iit \AWl
Starter
when 2. 10 $wilCh circuit
($tarte.)
3. IG switch
4. EeU
Air con. switch
1 .
Throttle poiilion sensor
2.
t
if Circuit
J Throttle posit>0 1 1 sensor
Ne�l.al $111,1 Switch
FI-25
'
"
• •• • •
...
.
- -
FI_44
c 1
,
u u
FI·37
.
-
. - - .
sensa<
fl·46
FI·37
FI·35
FI-45
d
ens
s o r
-
fI·39
-