Electrical Equipment and Appliances Toyota Highlander 1 (XU20)

General information and precautions
The electrical system has a supply voltage of 12 V, the negative terminals are connected to the "ground". Power for all lighting and additional electrical devices is provided by a lead-acid battery, which is recharged...

Troubleshooting Electrical Circuits — General Information
1. A typical electrical circuit consists of an electrical component, switches, relays, motors, fuses, fuse links, or circuit breakers associated with the component, and the wiring and electrical connectors that link the...

Fuses and fuse links — general information
Fuses and fuses 1. Protection of the vehicle's electrical circuits is ensured by using a combination of fuses and circuit breakers (breakers) circuits and fuse links. Fuse boxes are located under the front panel and in...

Circuit breakers — general information
1. Automatic switches (or breakers) are used to protect the electrical circuits of certain functions, such as electric window motors or seat heating. Depending on the vehicle's equipment, circuit breakers may be located...

Relays — General Information and Testing
General information 1. Some electrical systems and devices in a car, such as fuel injection systems, horns, starters, and fog lights, use a relay to transmit an electrical signal to a component. Each relay contains a...

Direction indicator and hazard warning light relay — testing and replacement
Examination Warning! The models covered by this manual are equipped with a Supplemental Restraint System (SRS), commonly known as the "airbag system". To prevent accidental airbag deployment, which could result in...

Ignition Switch and Cylinder Replacement
Warning! The models covered by this manual are equipped with a Supplemental Restraint System (SRS), commonly known as the air bag system. To prevent accidental air bag deployment, which could result in injury, be sure...

Multi-function switches — replacement
Warning! The models described in this manual are equipped with a Supplemental Restraint System (SRS) - "airbag system". To prevent accidental deployment of the airbags, which could result in injury, be sure to disable...

Front Panel Switches — Replacement
Warning! The models described in this manual are equipped with a Supplemental Restraint System (SRS) - "airbag system". To prevent accidental deployment of the airbags, which could result in injury, be sure to disable...

Instrument cluster — removal and installation
Warning! The models covered by this manual are equipped with a Supplemental Restraint System (SRS), commonly known as the air bag system. To prevent accidental air bag deployment, which could result in injury, be sure...

Radio and speakers — removal and installation
Warning! The models covered by this manual are equipped with a Supplemental Restraint System (SRS), commonly known as the air bag system. To prevent accidental air bag deployment, which could result in injury, be sure...

Antenna — replacement
A common antenna dream 1. Unscrew the antenna mast from the base (Fig. 12.1). Fig. 12.1. To remove the antenna mast from its base, simply unscrew it Antenna base 2. Remove the antenna mast (Fig. 12.1). 3. Working inside...

Windscreen wiper motor — checking and replacing
Checking the electrical circuit of the windshield wiper motor Note: Refer to the electrical diagrams to perform the following tests. When checking for voltage, apply the probe of a grounded 12-volt test lamp to each...

Rear Window Defogger System — Checking and Repairing
1. The rear window heating grid consists of a series of horizontal heating elements located on the glass surface. 2. Small breaks in the heating element can be repaired without removing the rear window. Examination 3....

Headlight bulbs — replacement
Warning! The gas in gas-discharge lamps is under pressure. Therefore, if the lamp hits or scratches the glass surface, it may break. Use eye protection when handling lamps. If possible, hold the lamp only by the base....

Headlight housing — replacement
Warning! The gas in gas-discharge lamps is under pressure. Therefore, the lamps may break if dropped or scratched on the glass surface. Use eye protection when handling lamps. If possible, hold the lamp only by the...

Headlights — adjustment
Note: The headlights must be correctly adjusted. If the headlights are not adjusted correctly, they can blind oncoming drivers and cause a serious accident or seriously impair your visibility. The headlight adjustment...

Sound signal — check and replacement
Warning! The models described in this manual are equipped with a Supplemental Restraint System (SPS), commonly known as the "air bag system". To prevent accidental deployment of the air bags, which could result in...

Replacing lamps
Lamps for external lighting devices Front direction indicators/parking lights and side lights Note: The front turn signal/parking light and side light bulbs are located in the headlight housing. 1. Remove the headlight...

Electrically adjustable exterior rear view mirrors — description
1. Most power rearview mirrors use two motors to move the glass: one to move up and down and one to move left and right. 2. There is a selector on the control switch that sends voltage to the mirror on the left or right...

Cruise control system — description
Models 1999-2003. 1. The cruise control system maintains vehicle speed using a vacuum-operated actuator located in the engine compartment. This actuator is connected by a cable to the throttle body. The system consists...

Electric window lifter — description
1. The electric window lift system uses electric motors installed in the doors to lower and raise the windows. The system includes relay control switches, electric motors, window lifters, glass locking mechanisms and...

Electric door lock drive — description
1. The power door lock system uses actuators installed in each door. The system includes switches, actuators, a control unit, and the corresponding electrical wiring. Diagnostics can usually be limited to simple checks...

Daytime Running Lights (DRL) — General Information
The Daytime Running Lights (DRL) system used on Canadian models is designed to require the headlights to be on whenever the engine is running. The only exception is when the parking brake is applied while the engine is...

Airbag system — general information
All models are equipped with a supplemental restraint system (SRS), commonly known as the air bag system. The air bag system is designed to protect the driver and front seat passenger from serious injury in the event of...

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