Toyota Land Cruiser 1988 Repair Manual page 11

IN-6
INTRODUCTION - General Repair Instructions
WRONG CORRECT
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IN0002
12. Observe the following precautions to avoid damage to the
parts:
(a) 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.)
(b) To disconnect vacuum hoses, pull on the end, not the
middle of the hose.
(c) To pull apart electrical connectors, pull on the con-
nector itself, not the wires.
(d) Be careful not to drop electrical components, such as
sensors or relays. If they are dropped on a hard floor,
they should be replaced and not reused.
(e) When steam cleaning an engine, protect the IIA, from
water.
(f) Never use an impact wrench to remove or install ther-
mo switches or thermo sensors.
(g) When checking continuity at the wire connector,
insert the tester probe carefully to prevent terminals
from bending.
(h) When using a vacuum gauge, never force the hose
onto a connector that is too large. Use a step-down
adapter instead. Once the hose has been stretched, it
may leak.
13. Tag hoses before disconnecting them:
(a) When disconnecting vacuum hoses, use tags to iden-
tify how they should be reconnected.
(b) After completing a job, double check that the
vacuum hoses are properly connected. A label on the
floor pan shows the proper layout.