Precautions; Inspection Precautions - Toyota 4A-FE Repair Manual

Fl-8
EFI SYSTEM - Precautions, Inspection Precaution
Tachometer
Check Connector
EM7500
4A ~ FE
CORRECT WRONG
PRECAUTIONS
1. Before working on the fuel system. disconnect the
negative (-) terminal from the battery.
HINT: Any diagnostic code retained by the computer will
be cleared when the battery terminal is removed.
Therefore, if necessary, read the diagnosis before remov-
ing the battery terminal.
2. (w/ AIRBAG)
Work must be started after approx. 20 sec:onds or
longer from the time the ignition switch is turned to
the "LOCK" position and the negative (-) terminal
cable is disconnected from the battery.
3.
When working on the fuel system, do not smoke or
work near any fire hazard.
4. Keep gasoline off rubber or leather parts.
INSPECTION PRECAUTIONS
MAINTENANCE PRECAUTIONS
1. CHECK CORRECT ENGINE TUNE-UP
2. PRECAUTIONS WHEN CONNECTING GAUGE
(a}
Connect the tachometer test orobe to the
IG 8 terminal of the check connector.
LOCATION: See
page
Fl-133
(b) Use the battery as the power source for the timing
light, tachometer, etc.
3. IN EVENT OF ENGINE MISFIRE, THE CATALYTIC
VERTER MAY OVERHEAT. THEREFORE, THE
FOLLOWING PRECAUTIONS SHOULD BE TAKEN
(a) Check proper connection of battery terminals, etc.
(b)
Handle high-tension cords carefully.
(c) After repair work, check that all ignition system wir-
ings are reconnected securely.
(d) When cleaning the engine compartment, be especial-
ly careful to protect the electrical system from water.
4. PRECAUTIONS WHEN HANDLING OXYGEN SENSOR
(a)
Do not allow the oxygen sensor to receive any physi-
cal impact or shocks.
(b)
Do not allow water to come into contact with the
sensor.