Precautions - Toyota 4A-F Repair Manual

IF VEHICLE IS EQUIPPED WITH MOBILE
RADIO SYSTEM (HAM. CB. ETC.)
The fCU hilS been designed so Ihal il wi. not be
outside inteftMence.
a C8 radio t ra nsc e i v er. etc. \&�en one wilh about l O W oulpu1!.
it may. at timas. have en a
i f the a n te nn a Ind feeder are installed nearby. Therefor&.
obseNe the following precautions:
1. Install the antenna as
ECU Is l oc a t undar the radio lAE and
ed
luggege complll1 m .nt (AWl.
inst al led II the retr sid. of the
2. Keep the Intenna
ECU wires - Blleast
not wind them together.
3. Check that thl feedlr and antenna are prop
Do not equip your vehicle with
4.
system.
AIR INDUCTION SYSTEM
1 .
Separation o f the engine oil dipstick. oil filler cap. pev
se. etc. may cause the engil"\8
ho
DlsconrleClion. looseness or cracks in the par
2.
Induction system belween the throttle body and cylinds
head will �lIow lir luctlon Ind cluse the engine
tuno.
01
1 .
ELECTRONIC CONTROL SYSTEM
OFF
Before remo�ing EFI wiring connectors. terminlls. etc.
lil"$l disconnect the power by either turning the ig
2
switch or di$(:onnecling Ihe battery terminals.
When installing Ihe baltery. be espeeiliity careful
incorrectly connect Ihe positive
c.lIblH.
3.
Do not permit parIS to
or in s
removal
4.
8 s e i l y the fCU.
p cil
Do not be Clreless during
num e rous 1<lInsistor cin:: u its and even slight terminal
5.
tact can cause further
Do not open thll
6.
When inspecting during rainy we�ther. take care
vent etltry of water Also. when weshing the engine
pert mInt prevvnt water trom getting on the
connectors.
wiring
7. Parts �hould be replaced es an assembly
However. if your vehicle is equipped
ffe ct upon EeU
85
possible from the fCU.
fer
so the ant
vehicle.
20
lieder as far OWly
cm 17.87 I n .)
iii
powerlul mobile radio
nm
to
ISl
receive a severe impact during
t a l la t on . Handla
i
III
troubleshooting as there
troubles.
ECU co v .
er
willl
affected by
espedal'f
operation.
TIll
rN
be
ATI. center the
e nna should
possible from 'hi
IS
- and. 8spec1llly.
do
,ed
e dju s
rly a
.r
out of tune.
iS of Ihe
10 run out
I
I
nitial
to
•
nOl
[3 1
and negative
F
1
I
E I parts clreful�.
'
III!
con­
to
pre·
com­
EFI parts aM
.
1