100 Series Land Cruiser / Lexus LX 470: Engine cranks normally but won't start

Checks, in order

1. Fuel pump prime
   Turn the key to ON and listen at the rear for the pump to hum for a couple of seconds. No sound points to a fuse, relay or the pump.
   easy $ · under about $50
2. Fuses and relays
   Check the fuel pump and EFI fuses and relays in the engine bay fuse box. Swap a matching relay to test.
   easy $ · under about $50
3. Security light
   A flashing immobilizer light while cranking means the computer is blocking fuel or spark. Try the spare key.
   easy $ · under about $50
4. Fuel pressure
   Connect a gauge to the rail and check pressure with the key on. Low pressure with a running pump means a clogged filter, regulator issue or weak pump.
   medium $$ · about $50 to $500
5. Timing belt and crank sensor
   If it cranks too freely, suspect a broken belt. Otherwise scan for sensor codes and confirm spark at a plug with a tester.
   hard $$ · about $50 to $500

Applies to: US-market UZJ100 Land Cruiser and Lexus LX 470, 1998 to 2007, with the 2UZ-FE 4.7L V8 (timing belt). AHC items apply to the LX 470 only; most US Land Cruisers have conventional shocks. Transmission is the A343F or A750F depending on year, so check the fluid spec for your truck.

Tools and parts for these checks

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Go deeper

• Toyota 2UZ-FE 4.7 V8: Specs, Reliability & High Mileage Guide

The same problem on other Toyotas

• 3rd Gen Tacoma (2016–2023): Engine cranks but won't start or dies right after starting
• 1st Gen Tacoma (1995.5–2004): Cranks fine but won't start or dies after starting
• 5th Gen 4Runner (2010–2024): Engine cranks but won't start
• 3rd Gen 4Runner (1996–2002): Engine cranks but won't start
• FJ Cruiser (2007–2014): Engine cranks normally but won't start
• 80 Series Land Cruiser (1991–1997): Cranks fine but won't fire

Other fuel & ignition problems on the 100 Series Land Cruiser / Lexus LX 470

• Rough idle, stumbling or a misfire code (P0300 to P0308)
• Check engine light with P0171, P0174 or air-fuel sensor codes (P2195, P2197)

More 100 Series Land Cruiser / Lexus LX 470 problems

• Timing belt due, squeal or rattle from the front of the engine, or coolant and oil weeping at the front (Engine)
• Engine temperature gauge climbing, overheating or losing coolant (Cooling)
• Turn the key: click or nothing, engine won't crank (Starting & Charging)
• Check engine light with secondary air injection codes (P2440, P2442, P2445, P0418), whirring at cold start (Emissions)
• LX 470: AHC lights flashing, truck sagging, uneven ride height or won't raise (Steering & Suspension)
• Clunk, rattle or wander in the front suspension (Steering & Suspension)

All 15 100 Series Land Cruiser / Lexus LX 470 symptoms in the interactive troubleshooter →

General guidance from owner experience. Confirm torque specs, fluid capacities and procedures in the factory service manual. Brakes, steering and anything structural: if in doubt, have a qualified shop inspect it before driving.