Toyota 1 MZ–FE Manual page 226

EG2–226
1MZ–FE ENGINE – SFI SYSTEM
IF VEHICLE IS EQUIPPED WITH MOBILE
RADIO SYSTEM (HAM, CB, ETC.)
If the vehicle is equipped with a mobile communica–
tion system, refer to the precaution in the IN section.
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 throttle body and
cylinder head will allow air suction and cause the
engine to run out of tune.
ELECTRONIC CONTROL SYSTEM
1. Before removing SFI wiring connectors, terminals,
etc., first disconnect the power by either turning the
ignition switch to LOCK or disconnecting the negative
(–) terminal cable from the battery.
HINT: Always check the diagnostic trouble code
before disconnecting the negative (–) terminal cable
from the battery.
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 SFI parts carefully,
especially the ECM.
4. Do not be careless during troubleshooting as there are
numerous transistor circuits and even slight terminal
contact can cause further troubles.
5. Do not open the ECM cover.
6. When inspecting during rainy weather, take care to
prevent entry of water. Also, when washing the
engine compartment, prevent water from getting or
the SFI parts and wiring connectors.
7. Parts should be replaced as an assembly.