Toyota Highlander Service & Repair Manual 2014-2019 PDF

2014-2019 Index

General Information & Maintenance

• Introduction, troubleshooting procedures for ECU-controlled systems, vehicle identification, repair instructions, maintenance schedules, preparation, and technical specifications for 1AR-FE, 2GR-FE, and 2GR-FKS engines.

Engine & Emission Control Systems

• Comprehensive mechanical service, overhaul procedures, cylinder blocks, cylinder heads, camshafts, drive belts, valve clearances, and engine assemblies for 1AR-FE (2.7L), 2GR-FE (3.5L V6), and 2GR-FKS (3.5L V6) petrol engines.
• Fuel delivery systems, direct and port fuel injectors, high-pressure fuel pumps, emission controls, intake and exhaust manifolds, cooling systems, lubrication circuits, and starting systems.
• Dynamic radar cruise control, forward recognition cameras, lane departure alert, and road sign assist systems.

Transmission & Drivetrain

• Automatic transaxle overhaul and service procedures for U660E, U660F, U760E, UA80E, and UA80F units, including transaxle fluids, valve bodies, TCMs, shift levers, and speed sensors.
• Axle systems, differential carrier assemblies, front and rear drive shafts, propeller shafts, and MF1A dynamic torque control 4WD/AWD transfer systems.

Brakes, Suspension & Steering

• Front and rear brake systems, flexible hoses, brake boosters, master cylinders, brake lines, parking brakes, and dynamic control systems including Anti-Lock Brakes (ABS), Vehicle Stability Control (VSC), downhill assist control, and speed sensors.
• Front and rear suspension overhaul, shock absorbers, stabilizer bars, control arms, trailing/upper arms, wheel alignment specifications, tire pressure monitoring systems (TPMS), and tires and wheels.
• Power steering systems, power steering ECUs, steering column assemblies, heated steering wheels, steering locks, and steering gear linkages for 2WD and AWD models.

Body, Exterior & Interior Equipment

• Body panels, front and rear doors, back doors, hoods, bumpers, mouldings, roof racks, rear spoilers, and sliding roof/sunroof systems.
• Instrument panels, center consoles, roof headlining, outer mirrors, and power mirror control systems with and without memory.
• Windshield and window glass, power window control systems with jam protection, window defoggers, windshield deicers, and front and rear wiper and washer systems.

HVAC, Audio, Navigation & Telematics

• Automatic and manual front and rear heating and air conditioning (HVAC) climate control systems, amplifiers, control panels, servo motors, blowers, PTC heaters, and cabin temperature/evaporator sensors.
• Audio and visual systems, radio receivers, amplifiers, speakers, digital DAB antennas, rear seat entertainment systems, and stereo jack adapters.
• Navigation systems, multi-information displays, navigation ECUs, and antennas.
• Park assist and monitoring features including blind spot monitors, clearance warning sonars, panoramic view monitors, rear view monitors, television cameras, and telematics systems.

Safety, Restraints & Security Systems

• Supplemental Restraint System (SRS) airbags, center and front airbag sensors, curtain shield airbags, knee airbags, seat cushion airbags, spiral cables, and steering pad modules.
• Seat belt systems, pretensioners, occupant detection sensors, and seat belt warning systems.
• Pre-collision safety systems, warning buzzers, smart entry and start systems, immobiliser systems, electrical key oscillators, theft deterrent systems, and transponder key amplifiers.

Mitigating Catastrophic Wear in the XU50 Powertrain

Rebuilding a direct-injected V6 engine or a multi-speed transaxle without verified physical clearances usually ends in disaster. A frequent mistake during reassembly of the late-model 2GR-FKS involves misaligning the camshaft timing marks, which instantly bends valves upon the very first crankshaft rotation. Diagnosing physical engine ticking or low compression without accurate data often leads to costly, repetitive teardowns.

This 27,011-page engineering archive delivers the exact structural limits required to keep the third-generation platform on the road. For the 1AR-FE 4-cylinder and the 2GR-FE/2GR-FKS V6 powerplants, mechanics will find exhaustive physical teardown instructions. The factory data covers everything from piston ring end-gaps and thrust washer measurements to precise lubrication system routing and oil pump rotor clearances.

In many engine rebuild cases, technicians fail to properly secure the aluminum cylinder heads using the mandatory multi-stage, angle-tightening method. Such an oversight guarantees head gasket failure and coolant ingestion. By strictly following the provided fastener sequences, you protect the engine block from destructive thermal and mechanical stress.

Eradicating Transaxle and Drivetrain Shudder

Moving power from the crank to the wheels involves an incredibly tight network of rotating assemblies. A common issue technicians encounter is aggressive gear whine from the MF1A transfer case. If the internal drive chain stretch exceeds the published limits, or if the case halves are mated without the exact specified sealant bead thickness, the unit will bind and leak under heavy all-wheel-drive loads.

Servicing the U660, U760, and the newer UA80 8-speed automatic transaxles demands pristine workbench conditions. Through this technical document, you gain the exact factory procedures needed to physically measure clutch pack clearances, inspect planetary gear tooth contact patterns, and rebuild the mechanical fluid channels within the valve body. Proper physical adjustment of the transmission control cable and shift lever detents is also fully documented to ensure crisp, positive gear engagement.

Restoring Ride Quality and Structural Integrity

Aligning a wandering front end takes far more than just adjusting the steering tie rods. Restoring the factory ride on the Highlander involves checking the physical runout of the wheel hubs, pressing new bushings into the lower suspension arms at the correct depth, and verifying the geometry of the rear trailing arms. One frequent mistake during reassembly is tightening suspension pivots while the chassis is drooping on a two-post lift. This locks the rubber bushings in a twisted state, causing them to physically shred apart once the vehicle's weight settles on the tires.

Stopping a heavy SUV requires absolute hydraulic brake pressure and perfect caliper slide pin lubrication. This guide details the physical overhaul of the brake booster, master cylinder, and disc brake assemblies. Even the advanced driver assistance hardware—such as the millimeter-wave radar sensor—requires precise mechanical leveling and rigid bracket alignment to target correctly.

Delivered as a highly detailed, 757 MB PDF, this structural reference allows you to instantly zoom in on intricate mechanical linkages, sliding roof tracks, and physical door lock latch mechanisms. Get immediate access to the full service manual and start diagnosing with precision.

Shop Floor Procurement Protocol

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Practical Diagnostic Use Cases (FAQs)

What are the specific physical tolerances for rebuilding the UA80F 8-speed transaxle?
The drivetrain section breaks down the entire UA80 series, detailing the required physical measurements for the mechanical clutch drum, input shaft end-play, and the torque sequences needed to secure the valve body assembly without physically distorting the internal hydraulic fluid channels.

Does this file contain the mechanical timing chain alignment procedures for the 2GR-FKS engine?
Yes. The engine mechanical chapter provides an exhaustive teardown of the late-model 3.5L V6. It outlines the exact physical positioning of the camshaft sprockets, tensioner guide wear limits, and the required sealant application paths for mating the timing chain cover to the block.

How do I properly adjust the physical alignment of the millimeter-wave radar sensor?
While a highly advanced system, the radar hardware relies entirely on strict physical positioning. The documentation supplies the exact bracket leveling measurements, mounting torque specifications, and physical targeting board setup distances required to mechanically align the sensor module behind the front grille.

Are the pressing tolerances for the front lower suspension arm bushings included?
Absolutely. The suspension chapters provide the exact dimensional depths required when pressing new bushings into the front lower suspension arms, ensuring the arm seats correctly in the subframe and maintains proper caster and camber geometry.