Toyota Corolla (E120) 2002–2008 Repair Manual / Introduction / Repair instruction / Precaution / Electronic control
Toyota Corolla (E120): Electronic control
- Removal and installation of battery terminal
- before performing electrical work, disconnect the battery negative (–) terminal cable beforehand so as to prevent burnt–out damage by short.
- When disconnecting and installing the terminal cable, turn the ignition switch and lighting switch off, and loosen the terminal nut completely. Perform these operations without twisting or prying the terminal.
- When the battery terminal is removed, all the memories
of the clock, radio, dtcs, etc. Will be erased.
So before removing it, check them and note them down.

- Handling of electronic parts
- do not open the cover or case of the ecu unless absolutely necessary (if the ic terminals are touched, the ic may be destroyed by static electricity).
- To disconnect electronic connectors, pull the connector itself, not the wires.
- Be careful not to drop electronic components, such as sensors or relays. If they are dropped on a hard floor, they should be replaced and not be reused.
- When cleaning the engine with steam, protect the electronic components, air filter and emission–related components from water.
- Never use an impact wrench to remove or install temperature switches or temperature sensors.
- When checking the continuity at the wire connector, insert the tester probe carefully to prevent terminals from bending.

Other materials:
Circuit description
The vehicle equipped with abs detects a vehicle speed using the stability
control ecu and wheel speed
sensor. This sensor monitors a wheel rotation speed and sends the signal to the
ecu.
The stability control ecu converts these wheel speed signals into a 4–pulse
signal and outputs it to ...
Power outlet
The power outlet can be used
for 12 V accessories that run on
less than 10 A.
Lift the lid while pulling up the
knob and open the power outlet
lid.
■The power outlet can be used
when
The engine switch is in ACC or ON.
■When turning the engine switch
off
Disconnect electrical devices with
charg ...
Exterior/interior trim
Preparation
Recomended tools
Equipment
Vehicle control system
Preparation
Recomended tools
...


