Electronic Control
WARNING: This page is about a different car, the 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- 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 electrical connectors, pull the connector itself, not the wires.
- Be careful not to drop electrical components, such as sensors or relays. If they are dropped on a hard floor, they should be replaced and not 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.