Maintenance Precautions; Precaution When Connecting Gauge; In Event Of Engine Misfire, The Following Precautions Should Be Taken; Precautions When Handling Oxygen Sensor - Toyota 22R-E Service Manual

ENGINE – MFI SYSTEM
PRECAUTIONS
1. Before working on the system, disconnect the neg–
ative 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

2. PRECAUTION WHEN CONNECTING GAUGE

(a) When a tachometer is connected to the system,con–
nect the tachometer test probe to the IG(–) 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 cleaning the engine compartment, be especially
careful to protect the electrical system from water.
4. PRECAUTIONS WHEN HANDLING OXYGEN
SENSOR
(a) Do not allow the oxygen sensor to drop or hit against
an object.
(b) Do not allow the sensor to come into contact with
water.
EG1–105