Just Autos Toyota LandCruiser 300 Series Custom ECU Multimap Upgrade

Traditional ECU remapping forces you to choose a single, fixed engine tune that must compromise between everyday fuel efficiency, heavy load capacity, and peak high-end performance. True ECU multi-mapping addresses this by storing multiple, completely independent calibrations inside your factory ECU simultaneously. Delivered by Hunter Mechanical as an authorized Just Autos distributor, this upgrade lets your LandCruiser 300 Series adapt immediately to real-world driving conditions on the fly.

Unlike basic "map switching" boxes that simply mask throttle sensitivity or apply crude global multipliers, this system uses native engine control logic. Each profile manages its own independent fuel injection timing, air-to-fuel ratios, boost pressure, transmission logic, and critical thermal protection safeguards.

Available Map Selections Include:

• Mode 0 — Immobiliser: Provides a robust extra layer of anti-theft security by allowing the engine to crank but preventing it from starting. (Can only be activated while the vehicle is stationary).

• Mode 1 — Idle Up / Winch Mode: Raises the engine idle speed to 1,500–2,000 RPM. Perfect for stationary winch usage, operating power-hungry external accessories, or rapid dual-battery charging without draining the primary system. Automatically reverts to stock mode once vehicle ground speed reaches 5 km/h.

• Mode 2 — Eco / Stock+: An optimized factory profile featuring fine-tuned throttle parameters to enhance daily drivability, smooth out power delivery, and maximize highway fuel efficiency.

• Mode 3 — Tow Mode (inc. Engine Brake): Built specifically for hauling heavy loads, caravans, or trailers. Reshapes low-end torque curves, optimizes gear selection transitions, prevents transmission gear hunting, and maintains safe exhaust gas temperatures under high stress. Offers enhanced engine braking control when combined with lower gear selections and higher RPM bands.

• Mode 4 — Power Mode: Unleashes the peak output potential of the engine by bringing both sequential turbochargers online simultaneously. Sharpened throttle response and maximum usable torque provide decisive acceleration and maximum high-performance delivery.

• Mode 5 — Power+: Retains peak horsepower outputs while delivering distinct performance dynamics, featuring aggressive launch control parameters, lumpy idle characteristics, and high pedal sensitivity.

Seamless Integration & Adjustment:

No crude switches, physical dials, or cutting and soldering of vehicle wiring are necessary. Map selections are handled directly through your factory cruise control controls on the steering wheel. Drivers can check their active map configuration instantly via the vehicle's dashboard tachometer needle before transitioning smoothly to a new setting.