Toyota Highlander XU70 Fuses: Complete Guide (2019+)

The Toyota Highlander XU70 (2019 and newer) uses a multi-box fuse and relay system to protect every electrical circuit in the vehicle. Understanding the exact layout of each fuse box, the amperage of each fuse, and its specific function is essential for diagnosing electrical faults, replacing blown fuses correctly, and avoiding damage to sensitive components. This guide covers every fuse box location and every individual fuse in the Toyota Highlander fourth generation (XU70) produced from 2019 onward.

Fuse Box Locations on the Toyota Highlander XU70

The Toyota Highlander XU70 has three primary fuse and relay centers:

• Engine Bay Fuse Box (Main Relay Block) — located on the left side of the engine compartment, near the battery
• Driver Side Instrument Panel Fuse Box — located behind the lower left trim panel on the driver’s side dashboard
• Passenger Side Instrument Panel / Junction Block — located behind the glove box or lower right trim panel

Engine Bay Fuse Box — Toyota Highlander XU70

The engine compartment fuse block handles high-amperage circuits powering critical drivetrain and body systems. Below is the complete listing:

• ALT — 120A — Alternator charge circuit
• AM1 — 80A — Main ignition supply fuse
• AM2 — 60A — Secondary ignition supply
• EFI — 40A — Engine control and fuel injection system
• EPS — 40A — Electric power steering
• ETCS — 30A — Electronic throttle control system
• HTR — 30A — Heater blower motor main supply
• ABS/VSC — 30A — Anti-lock braking and vehicle stability control
• RDI FAN — 30A — Radiator cooling fan relay circuit
• ECU-B — 20A — Engine ECU battery-direct feed
• D/S — 20A — Driver side power components
• HORN — 15A — Horn relay and circuit
• HAZ — 15A — Hazard flasher and turn signals
• DOME — 15A — Interior dome and courtesy lights
• OBD — 7.5A — Diagnostic port (OBD-II) constant feed
• TAIL — 15A — Tail lights and parking lights
• HEAD LH — 15A — Left headlight low/high beam
• HEAD RH — 15A — Right headlight low/high beam
• FOG — 15A — Front fog lights
• AMP — 20A — Audio amplifier (JBL or premium audio)
• CAMERA — 10A — Backup and surround view camera system
• 4WD — 20A — Four-wheel drive system (AWD models)
• COOLING FAN1 — 40A — Primary electric cooling fan
• COOLING FAN2 — 30A — Secondary cooling fan circuit
• IGN — 7.5A — Ignition relay coil supply
• STARTER — 7.5A — Starter relay control signal

Driver Side Instrument Panel Fuse Box — Toyota Highlander XU70

This fuse block is accessed by removing the lower trim panel to the left of the steering column. It controls cabin and driver-focused systems:

• 1 — 10A — Stop (brake) lights
• 2 — 10A — Turn signal and hazard lamps
• 3 — 15A — Cigarette lighter / accessory socket (driver side)
• 4 — 20A — Power windows (driver and passenger front)
• 5 — 20A — Power door lock actuators
• 6 — 10A — Instrument cluster and gauges
• 7 — 10A — Combination meter and multi-information display
• 8 — 7.5A — Keyless entry and smart key system
• 9 — 10A — Steering column controls and clock spring
• 10 — 10A — Cruise control and lane departure warning
• 11 — 10A — Pre-collision system (PCS) and radar sensor
• 12 — 10A — Parking assist sensor (front and rear)
• 13 — 15A — Heated steering wheel
• 14 — 15A — Driver seat heater and ventilation
• 15 — 15A — Passenger seat heater and ventilation
• 16 — 10A — Mirror adjustment and auto-dimming rear view mirror
• 17 — 10A — Wiper intermittent and speed control relay
• 18 — 20A — Front wiper motor
• 19 — 15A — Rear wiper motor
• 20 — 10A — Washer pump (front and rear)
• 21 — 10A — Interior ambient lighting
• 22 — 10A — Head-up display (HUD) unit
• 23 — 7.5A — Immobilizer and security system
• 24 — 10A — SRS airbag system control unit

Passenger Side / Junction Fuse Box — Toyota Highlander XU70

Located behind the glove box on the passenger side. Governs infotainment, HVAC, rear systems and convenience features:

• 1 — 15A — Audio head unit and display screen
• 2 — 10A — Navigation and GPS antenna module
• 3 — 10A — Bluetooth and telematics (Toyota Connected Services)
• 4 — 20A — Front USB and 12V accessory sockets
• 5 — 20A — Rear USB ports and rear entertainment system
• 6 — 15A — Rear seat 12V accessory outlet
• 7 — 30A — HVAC blower motor control
• 8 — 20A — Air conditioning compressor clutch relay
• 9 — 10A — Climate control panel (dual-zone or tri-zone)
• 10 — 10A — Rear HVAC controls (Tri-Zone models)
• 11 — 20A — Power rear liftgate motor
• 12 — 10A — Rear liftgate sensor and control module
• 13 — 20A — Third-row power seat fold mechanism
• 14 — 15A — Second-row power seat adjustment
• 15 — 15A — Driver power seat motor
• 16 — 15A — Passenger power seat motor
• 17 — 20A — Sunroof / moonroof motor
• 18 — 15A — Rear window defogger (heating element)
• 19 — 10A — Heated mirrors
• 20 — 10A — Blind-spot monitoring and rear cross-traffic alert
• 21 — 10A — Tow package wiring and trailer socket (if equipped)
• 22 — 7.5A — ECM memory keep-alive power
• 23 — 10A — Power back door sensor (proximity kick sensor)
• 24 — 15A — Wireless device charger (Qi pad, if equipped)

Fuse Identification and Replacement Tips for XU70 Highlander

• Fuse types used: The XU70 Highlander uses Mini (ATM), Regular (ATC/ATO), and Maxi/Mega blade-style fuses depending on the circuit
• Always replace a blown fuse with the exact same amperage — never use a higher-rated fuse as this can cause wiring harness fires
• A fuse blowing repeatedly indicates a short circuit or overloaded component — do not just replace without diagnosing the root cause
• The fuse box covers on the XU70 have a printed diagram — always cross-reference with this guide for accuracy as production variations may exist
• Use a fuse puller tool included in the driver’s side fuse panel to avoid damage to adjacent fuses
• Hybrid Highlander XU70 variants have additional fuse protection within the hybrid battery assembly — these should only be serviced by a qualified Toyota technician