Checks, in order
- Shift procedureFollow the manual's procedure for 4H and 4L, including stopping and shifting the transmission to neutral for low range. Make sure the lever goes fully into the detent.easy $ · under about $50
- Indicator light or switchIf the truck feels like it is in 4WD but the dash light does not come on, the transfer case indicator switch is the likely culprit. Try the other range to see if the light follows.easy $ · under about $50
- Tire sizes and pressuresA-TRAC, VSC or ABS lights that appear in 4WD often come from a mismatch in tire diameter between axles. Make sure all four tires are the same size and similarly worn.easy $ · under about $50
- Wheel speed sensors and wiringA scan tool will show a wheel speed sensor code. Check the sensor and its connector at each wheel for damage or a dirty tone ring.medium $$ · about $50 to $500
- Front differential and transfer case fluidCheck the level on both. Toyota has issued a bulletin for front differential groaning or grinding in 2WD on trucks like this, so note when the noise happens and tell the shop.medium $ · under about $50
Applies to: US-market FJ Cruiser, 2007 to 2014, with the 1GR-FE 4.0L V6 (timing chain) and either the 5-speed automatic or the 6-speed manual. Assumes the part-time 4WD model with a floor-mounted transfer case lever; 2WD trucks skip the 4WD checks.
Tools and parts for these checks
Links below are Amazon affiliate links: as an Amazon Associate, toyotadata earns from qualifying purchases, at no extra cost to you. Confirm fitment for your exact truck before you order.
| ITEM | USED FOR | BUY |
|---|---|---|
| Gear oil for your truck | Changing front diff and transfer case oil to the factory spec | Shop on Amazon |
| Fluid transfer pump | Filling through the fill or check plug | Shop on Amazon |
| Digital multimeter | Voltage, ground and continuity checks | Shop on Amazon |
| 1/2" drive click torque wrench | Tightening suspension and driveline bolts to spec | Shop on Amazon |
Go deeper
The same problem on other Toyotas
- 2nd Gen Tacoma (2005–2015): 4WD won't engage, 4WD light flashing, or grinding in four-wheel drive
- 1st Gen Tacoma (1995.5–2004): 4WD won't engage or front axle doesn't seem to drive
- 4th Gen 4Runner (2003–2009): 4WD won't engage, front axle stuck or binding
- 3rd Gen 4Runner (1996–2002): 4WD won't engage or front axle seems stuck
Other drivetrain problems on the FJ Cruiser
- Clunk or thump from the rear when coming to a stop or pulling away
- Vibration that changes with vehicle speed, felt in the seat or floor
- Oil leaking from the rear differential, or whining, howling or grinding from the rear axle
More FJ Cruiser problems
- Rust on the frame, especially at the rear crossmember (Frame & Body)
- Steering wheel shimmy or flutter at highway speed (Steering & Suspension)
- Shudder or vibration under light throttle, or hunting and harsh shifts (automatic) (Transmission)
- Turn the key: click or nothing, engine won't crank (Starting & Charging)
- Engine cranks normally but won't start (Fuel & Ignition)
- Rough idle, stumbling or a misfire code (P0300 to P0306) (Fuel & Ignition)
All 16 FJ Cruiser 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.