These instructions apply to the Toyota Corolla Mk11 (E170) 2014-2019.
For other models, please choose your vehicle here.
Before electrical work on a 2014–2019 Toyota Corolla you disconnect the 12 V battery, negative first. This is the US-market procedure.
- Ignition off, key out, eye protection on.
- Open the hood; the battery is in the engine compartment.
- Remove the negative (−, black) cable first, then the positive (+, red).
- Reconnect positive first, negative last and tighten both.
- Reset the clock and audio; the TPMS re-initializes on the next drive.
FAQ
Which cable first?
Negative off first, negative on last.
What resets afterward?
Clock, audio presets, and the readiness (OBD) monitors; drive normally for a day or two to re-set them.
Recharging on the car?
Switch the ignition off before connecting a charger.
If your Corolla stores a fault code with the warning light, look it up on autodtcs.com.
Independent guide — not affiliated with Toyota. Always follow your official service manual and safety precautions. Read our full disclaimer.