Checks, in order
- Restart the systemShut off the truck, open and close the driver door, and restart. Some infotainment and camera faults clear this way, but note if they return.easy $ · under about $50
- Phone and cableTry a different cable and forget and re-pair the phone. Many connection issues come from a bad cable.easy $ · under about $50
- Check for software updatesSee if Toyota offers an over-the-air or dealer update for the head unit and ask the dealer at your next visit.easy $ · under about $50
- A/C basicsReplace a dirty cabin filter and check that the compressor engages when A/C is on. If the air is warm, the system may be low on refrigerant, which on a new truck suggests a leak.easy $ · under about $50
- Dealer diagnosisAny persistent electrical or A/C fault should be documented and repaired under warranty.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 affiliate links: toyotadata earns a commission from VEVOR and, as an Amazon Associate, from qualifying Amazon purchases, at no extra cost to you. Confirm fitment for your exact truck before you order.
| ITEM | USED FOR | BUY |
|---|---|---|
| A/C manifold gauge set | Reading high and low side pressures | Shop on Amazon |
| A/C UV leak detection light | Finding refrigerant leaks in systems with UV dye | Shop on Amazon |
| A/C vacuum pump and gauge set (R134a and R1234yf) | Pulling a vacuum after the system has been opened, before recharging | Shop on VEVOR |
| Digital multimeter | Voltage, ground and continuity checks | Shop on Amazon |
Other body & electrical problems on the 6th Gen 4Runner
- Something is wrong on a new 4Runner: warranty, recalls and where to start
- Digital gauge cluster blank, missing speedometer, or warning lights not showing at startup
More 6th Gen 4Runner problems
- 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)
- Won't start or crank on the 2.4L turbo (non-hybrid) (Starting & Charging)
- Check engine light on, with or without a code (Engine)
- Rough idle, stumbling, hesitation, or stalling (Fuel & Ignition)
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.