Checks, in order
- Battery voltageResting voltage should be about 12.4 V or more. Below 12 V, charge and test the battery before chasing other causes.easy $ · under about $50
- TerminalsCheck that the battery terminals are tight and clean. A loose clamp gives a click and no crank.easy $ · under about $50
- Fob and brake pedalPress the brake hard and try the backup fob position in the manual. A weak fob battery is a very common no-start on smart-key trucks.easy $ · under about $50
- Look for stored codesA basic OBD2 reader can show whether the computer logged a fault. Photograph any codes for the dealer.easy $ · under about $50
- Dealer diagnosisA starter, fuel pump or immobilizer fault is a warranty repair on a truck this new.hard $$$ · shop-level job, $500+
Applies to: 6th generation 4Runner, 2025 and newer, with the 2.4L turbocharged i-FORCE and the i-FORCE MAX hybrid, both with the 8-speed automatic. This is a new platform with little long-term history, so most entries are general symptoms; when the truck is under warranty, the dealer is the right first stop.
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 |
|---|---|---|
| Digital multimeter | Voltage, ground and continuity checks | Shop on Amazon |
| Battery load tester | Testing the battery under load before replacing parts | Shop on Amazon |
| Battery terminal cleaning brush | Cleaning corroded terminals and cable ends | Shop on Amazon |
| Bluetooth OBD2 scanner with live data | Reading and clearing codes and watching live sensor data | Shop on Amazon |
More 6th Gen 4Runner problems
- Something is wrong on a new 4Runner: warranty, recalls and where to start (Body & Electrical)
- Digital gauge cluster blank, missing speedometer, or warning lights not showing at startup (Body & Electrical)
- Clunk or abrupt shift, especially 1st to 2nd, or hesitation pulling away (Transmission)
- Front brakes squealing or chirping on a new truck (Brakes)
- Hybrid won't go to READY, or dead 12 V battery in the i-FORCE MAX (Hybrid System)
- Check engine light on, with or without a code (Engine)
All 14 6th Gen 4Runner 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.