Toyota Corolla: Maintenance and care / Do-it-yourself maintenance

Emission inspection and maintenance (I/M) programs

Some states have vehicle emission inspection programs which include OBD (On Board Diagnostics) checks. The OBD system monitors the operation of the emission control system...

Do-it-yourself service precautions

If you perform maintenance by yourself, be sure to follow the correct procedure as given in these sections. Maintenance WARNING The engine compartment contains many mechanisms and fluids that may move suddenly, become hot, or become electrically energized...

Other information:

Toyota Corolla 2019-2026 Owners Manual: Checking and replacing fuses

If any of the electrical components do not operate, a fuse may have blown. If this happens, check and replace the fuses as necessary. Checking and replacing fuses 1 Turn the engine switch off. 2 Open the fuse box cover. ► Engine compartment: type A fuse box Push the tabs in and lift the lid off...

Toyota Corolla 2019-2026 Owners Manual: Battery

Check the battery as follows. ■ Battery exterior Make sure that the battery terminals are not corroded and that there are no loose connections, cracks, or loose clamps. A - Terminals B - Hold-down clamp ■ Before recharging When recharging, the battery produces hydrogen gas which is flammable and explosive...