Toyota Supra 1990 Manual page 8

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INTRODUCTION - General Repair Instructions

Observe the following precautions to avoid damage to the

Do not open the cover or case of the ECU unless

absolutely necessary. (If the IC terminals are touched,

the IC may be destroyed by static electricity.)

To disconnect vacuum hoses, pull on the end, not the

middle of the hose.

To pull apart electrical connectors, pull on the con-

nector itself, not the wires.

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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.

When steam cleaning an engine, protect the dis-

tributor, coil, air filter and air intake from water.

Never use an impact wrench to remove or install

temperature switches or temperature sensors.

When checking continuity at the wire connector,

insert the tester probe carefully to prevent terminals

from bending.

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

13. Tag hoses before disconnecting them:

When disconnecting vacuum hoses, use tags to identi-

fy how they should be reconnected.

After completing a job, double check that the

vacuum hoses are properly connected. A label under

the hood shows the proper layout.

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