Toyota Land Cruiser 1988 Repair Manual page 136

EFI SYSTEM- Inspection Precautions Fl-5
F12368
EM4369
IF VEHICLE IS EQUIPPED WITH MOBILE
RADIO SYSTEM (HAM, CB, ETC.)
The ECU has been designed so that it will not be affected by
outside interference.
However, if your vehicle is equipped with a CB radio
transceiver, etc. (even one with about 10 W output), it may,
at times, have an affect upon ECU operation, especially if the
antenna and feeder are installed nearby.
Therefore, observe the following precautions:
1. Install the antenna as far as possible from the ECU. The
ECU is located behind the glove box, so the antenna
should be installed at the rear side of the vehicle.
2. Keep the antenna feeder as far away as possible from the
ECU wires-at least20 em (7.87 in.) -and, especially, do
not wind them together.
3. Check that the feeder and antenna are properly adjusted.
4. Do not equip your vehicle with a powerful mobile radio
system.
5. Do not open the cover or the case of the ECU unless
absolutely necessary.
(If the IC terminals are touched, the IC may be destroyed
by static electricity.)
AIR INDUCTION SYSTEM
1. Separation of the engine oil dipstick, oil filler cap, PCV
hose, etc. may cause the engine to run out of tune.
2. Disconnection, looseness or cracks in the parts of the air
induction system between the air flow meter and cylinder
head will allow air suction and cause the engine to run
out of tune.
ELECTRONIC CONTROL SYSTEM
1. Before removing EFI wiring connectors, terminals, etc.,
first disconnect the power by either turning the ignition
switch OFF or disconnecting the battery terminals.
2. When installing the battery, be especially careful not to
incorrectly connect the positive ( +) and negative (-)
cables.
3. Do not permit parts to receive a severe impact during
removal or installation. Handle all EFI parts carefully, es-
pecially the ECU.
4. Do not be careless during troubleshooting as there are
numerous transistor circuits and even slight terminal
contact can cause further troubles.
5. When inspecting during rainy weather, take care to pre-
vent entry of water. Also, when washing the engine com-
partment, prevent water from getting on the EFI parts and
wiring connectors.
6. Parts should be replaced as an assembly.