These instructions apply to the Toyota 4Runner Mk5 (N280) 2010-2024.
For other models, please choose your vehicle here.
Before electrical work on a 2010–2024 Toyota 4Runner 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).
- Do your work. Reconnect positive first, negative last; tighten both.
- On smart-key vehicles, shift to P, open and close a door, then start. The engine may not catch on the first try after a reconnect — that’s normal.
FAQ
Which cable first?
Negative off first, negative on last.
Why didn’t it start on the first try?
After reconnecting, the system re-initializes — a failed first crank is normal; try again.
Recharging on the vehicle?
Disconnect the ground (negative) cable first before connecting a charger.
If your 4Runner 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.