The first-generation Nissan Titan (A60, 2004–2015) uses a turn-key NATS engine immobiliser and a combination-meter self-diagnosis mode you enter by holding the odometer/trip button while turning the ignition on for five to eight seconds. This generation shares its VK56DE V8 and much of its electronics with the Armada and Infiniti QX56, so the battery-disconnect relearns below apply across the family. There is no resettable dashboard service light on this generation — the pages here focus on the resets that genuinely exist.
