Toyota Corolla (E170) 2014–2019 Owners Manual / Maintenance and care / Do-it-yourself maintenance / Do-it-yourself service precautions
Toyota Corolla (E170): Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the correct procedure as given in these sections.


CAUTION
The engine compartment contains many mechanisms and fluids that may move suddenly, become hot, or become electrically energized. To avoid death or serious injury, observe the following precautions.
■When working on the engine compartment
●Keep hands, clothing and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, radiator, exhaust manifold, etc. right after driving as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper and rags, in the engine compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery.
Fuel and battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and corrosive sulfuric acid.
■When working near the electric cooling fan or radiator grille
Vehicles without a smart key system: Be sure the engine switch is off. With
the engine switch in the “ON” position, the electric cooling fan may automatically
start to run if the air conditioning is on and/or the coolant temperature is high.
Vehicles with a smart key system: Be sure the engine switch is off. With the engine
switch in IGNITION ON mode, the electric cooling fan may automatically start to
run if the air conditioning is on and/or the coolant temperature is high. ■Safety
glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc.
from getting in your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to dirt in the air.
Other materials:
Circuit description
The ecm compares the two waveforms of the heated oxygen sensors located
before and after the catalyst
to determine whether or not the catalyst performance has deteriorated.
Air–fuel ratio feedback compensation keeps the waveform of the heated oxygen
sensor in front of the catalyst
alterna ...
Overhaul
1. Drain clutch fluid
2. Remove brake master cylinder sub–assy
3. Remove brake booster assy
4. Disconnect clutch reservoir tube
Loosen the clip and disconnect the clutch reservoir tube
from the clutch master cylinder assy.
Hint:
use a container to catch the fluid.
5. Disconnect ...
Air outlet layout and operations
■ Location of air outlets
The air outlets and air volume
changes according to the
selected air flow mode.
:If equipped
■ Adjusting the position of
and opening and closing
the air outlets
Front center
Direct air flow to the left or right, up
or down
Front right-hand side
Direct air flow to th ...


