Symptoms
The truck won't go into Ready after the doors or hatch have been open for a while with the engine off.
The fix, step by step
- Load-test the 12 V battery and replace it if it's weak.
- Owners recommend carrying a lithium jump pack, fitting a Bluetooth battery monitor (the Ancel BM300 and BM200 Pro have been mentioned) to watch state of charge, or starting the hybrid system before a long unloading stop.
- One owner warns that a big aftermarket AGM may sit at a partial charge, because the hybrid system doesn't fully top it off.
Tools & part numbers
- Battery tester
- jump pack
- battery monitor
- 10 mm wrench.
Where to buy the parts
12 V batteryRockAuto ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Toyota Land Cruiser 250 Series parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.