These instructions apply to the Nissan Titan Mk1 (A60) 2004-2015.
For other models, please choose your vehicle here.
Disconnecting the 12-volt battery on the Nissan Titan (A60, 2004–2015) is straightforward, but doing it in the right order protects the electronics and saves you headaches afterwards. Here is how to disconnect and reconnect safely, and what the truck needs relearned once power is restored.
Where the Battery Is
The 12-volt battery sits in the engine bay. Before you touch it, have your radio security details to hand and make sure the ignition is OFF and the doors are closed to limit wake-up current.
How to Disconnect and Reconnect
- Turn the ignition OFF and switch off all electrical loads (lights, climate control, audio).
- Loosen and remove the negative (−) terminal first, and tuck the cable aside so it cannot spring back onto the post.
- Remove the positive (+) terminal next if you are taking the battery out.
- Do your work. When refitting, connect the positive (+) terminal first, then the negative (−) terminal last.
- Tighten both clamps firmly and make sure they do not move on the posts.
What to Relearn After Reconnecting
Losing power clears several learned and stored settings. Once the battery is back on:
- Idle: the engine may idle roughly at first — carry out the idle-air-volume relearn if it does not settle.
- Power windows: the one-touch/auto-up function needs reinitialising before it will work again.
- Clock and radio: reset the time and re-enter any audio presets or security code.
- Security system: the NATS security indicator resumes its normal flashing — no action needed.
Frequently Asked Questions
Why negative first? Removing the earth (−) lead first means your spanner cannot cause a short against the bodywork while you work on the positive side.
Will disconnecting the battery clear fault codes? It can clear some stored data, but it does not fix the underlying fault — if the check-engine light was on, it may return once the truck completes its drive cycle.
Do I need a memory saver? It is optional. A memory saver keeps the clock, presets and learned values alive, saving you the relearn steps, but the truck runs perfectly well without one after the relearns above.
My windows won’t auto-close now — is that a fault? No. The auto function simply needs reinitialising after any power loss.
If a warning light stays on after reconnecting and you need to look up the code, visit our sister site autodtcs.com.
Independent guide — not affiliated with Nissan. Always follow your official service manual and safety precautions. Read our full disclaimer.