Precautions When Connecting Gauge; Precautions When Handling Heated Oxygen Sensor - Toyota 22R-E Service Manual

ENGINE – MFI SYSTEM
PRECAUTIONS
1. Before working on the fuel system, disconnect the
negative terminal from the battery.
HINT: Any diagnostic trouble code retained by the
computer will be erased when the battery terminal is
removed.
Therefore, if necessary, read the diagnosis before
removing the battery terminal.
2. Do not smoke or work near an open flame when
working on the fuel system.
3. Keep gasoline away from rubber or leather parts.
MAINTENANCE PRECAUTIONS
1. CHECK CORRECT ENGINE TUNE–UP
(See page EG2–12)

2. PRECAUTIONS WHEN CONNECTING GAUGE

(a) Connect the tachometer positive terminal to the IG E)
terminal of the DLC1.
(b) Use the battery as the power source for the timing
light, tachometer, etc.
3. IN EVENT OF ENGINE MISFIRE, 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 the ignition coil termi–
nals and all other ignition system lines are reconne–
cted securely.
(d) When clearing the engine compartment, be especially
careful to protect the electrical system from water.
4. PRECAUTIONS WHEN HANDLING HEATED
OXYGEN SENSOR
(a) Do not allow the heated oxygen sensor to drop or hit
against an object.
(b) Do not allow the sensor come into contact with water.
EG2–165