Toyota Supra 1990 Manual page 179

Check Connector
EFI SYSTEM - Precautions, Inspection Precautions
FI-5
IGl156
/
IG0596
PRECAUTIONS
1. Before working on the fuel system, disconnect the nega-
tive terminal from the battery.
HINT: Any diagnostic code retained by the computer will
be erased when the battery terminal is removed.
Therefore, if necessary, read the code before removing the
battery terminal.
CAUTION: Work must be started after approx. 20 se-
conds or longer from the time the ignition switch is turned
to the "LOCK" position and the negative (-) terminal
cable is disconnected from the battery.
2. Do not smoke or work near an open flame when working
on the fuel system.
3. Keep gasoline off rubber or leather parts.
INSPECTION PRECAUTIONS
MAINTENANCE PRECAUTIONS
1. INSURE CORRECT ENGINE TUNE-UP
2. PRECAUTIONS WHEN CONNECTING GAUGE
3.
4.
(a) Connect the tachometer test probe to the terminal IG
8
of check connector.
(b) Use the battery as the power source for the timing
light, tachometer, etc.
IN EVENT OF ENGINE MISFIRE THE FOLLOWING
PRECAUTIONS SHOULD BE TAKEN
(a) Insure proper connection of battery terminals, etc.
(b) Handle high-tension cords carefully.
(c) After repair work, insure that the ignition coil termi-
nals and all other ignition system line are reconnect-
ed securely.
(d) When cleaning the engine compartment, be especially
careful to protect the electrical system from water.
PRECAUTIONS WHEN HANDLING OXYGEN SENSOR(S)
(a) Do not allow oxygen sensor to drop or hit against an
object.
(b) Do not allow water to come into contact with the sen-
sor or attempt to cool it.