Main unit
It is located under the hood of the car and contains most of all the fuses of the car. Their task is to ensure the uninterrupted operation of electrical systems, devices, and sensors. They prevent sudden voltage surges, extending the life of the car.
In addition to the main ones, the mounting block includes parts that are responsible for the operation of towing, lighting inside the car, and dimensions. There are protection elements for fuel injection, starting, and navigation systems. The panel itself contains space for installing additional components.
The Prado 150 fuse diagram is pasted on the back of the cover. Detailed information about the purpose of each part is found in the documentation that comes with the car. The table lists some of the parts along with their serial number, designation and function.
| Number | Name | Current strength | Function |
| 8 |
40 A*4 (diesel engine)
In total, the main block includes 62 components.
Mounting block
No modern car can do without a mounting block. Its location is inside the cabin. This device is a board on which safety elements are attached. Its design makes it easy to replace a component in the event of a malfunction.
As in the main unit, the Prado 150 fuse diagram is attached to the cover, and is also recorded in documents that describe in detail the number, name, and purpose in the following form:
| FUEL HTR*1 | 25 A | Fuse for Prado 150 with a diesel engine, responsible for heating the fuel | |
| 19 | A/C COMP | 10 A | Protects air conditioners from overload |
| 23, 24 | H-LP RH-HI, H-LP LH-HI | 15 A | Protects high beam headlights |
| 28 | ST | 30 A*3 (gasoline) | |
| Protects starter operation | |||
| 31 | TURN&HAZ | 15 A | Responsible for transmitting trailer, turn and instrument signals |
| 34 | FUEL PMP*5 | 15 A | Regulates the operation of the fuel pump |
| 38 | GLOW*4 | 80 A | Organizes the operation of glow plugs |
| 50 | TOWING BRK | 30 A | Responsible for correct towing |
| 59 | WSH RR | 15 A | Provides operation of the rear window washer |
| 60, 61, 62 | SPARE | — | Spare seats |
| Number | Name | Current strength | Function |
| 1 | P/OUTLET | 15 A | Prado 150 cigarette lighter fuse, as well as electrical socket |
| 12 | FOG FR | 15 A | Responsible for the operation of fog lights |
| 14 | A/C | 7.5 A | Regulates how air conditioners operate |
| 18 | IG1 | 7.5 A | Provides operation of turn signals, trailer lights, ALT, C/C switch, VSC |
| 20 | S/HTR FR | 20 A | Responsible for seat heating |
| 26 | S/ROOF | 25 A | Prevents opening and closing of the sunroof |
| 27 | WIP | 30 A | Responsible for cleaning and washing the windshield |
| 29 | COOLING | 10 A | Protects the cooling system in the bar compartment between the driver and front passenger seats (optional) |
| 31 | GAUGE | 7.5 A | Regulates the operation of interior instruments |
The total number of parts of the mounting block is 33.
Fuses and relays in the cabin
To eliminate a system malfunction in the vehicle's electrical network, all precautions must be taken. You cannot use devices of a higher rating, objects not suitable for these purposes, homemade “bugs” or just wire. In case of frequent breakdowns, you should find the main reason for the increase in current strength in the vehicle network, and then begin to eliminate it.
There are 2 options for location - right and left hand drive. Photo of fuses for Land Cruiser Prado 120 4 liters in the cabin:
In the Toyota Prado 120, all fuses are installed on the instrument panel behind a plastic cover, and the relay is on the back of the mounting block.
Cigarette lighter and dimensions
On the Prado 120 4 liter, the cigarette lighter fuse is located in the same place where the TEMS and SRS (airbag system) are located - on the instrument panel in the cabin, has the serial number 24 and the abbreviation “CIG”.
The fuse for Prado 120 dimensions, regardless of which steering wheel (right or left), is marked “TAIL” No. 22 of the interior block. If it malfunctions, the turns do not turn on (do not light up), and the vehicle license plate illumination disappears. Relay No. 2 is also responsible for the sidelights.
TEMS system
The fuses of the TEMPS system in the Land Cruiser Prado 120 4 liters on the specified panel have serial number 6 and are marked “TEMS”. This electronically adjustable suspension was developed by Toyota for its line of cars. This system has several driving options (comfortable, sporty, ultra-comfortable, semi-sporty) and allows the car to respond adequately in the event of sharp turns, fast braking, and off-road driving. TEMS itself reconfigures the load on the Toyota Prado 120 axle, the stiffness of the shock absorbers, the height of the chassis, maintains vehicle stability and counteracts body roll to the side and in the transverse direction, as well as “nose dive” in case of braking.
Other
The following are responsible for lifting, cleaning and washing the front, side, rear windows and hatch:
- FR WIP−WSH (5);
- RR WIP (8);
- RR WSH (14);
- P FR P/W (18);
- P RR P/W, D RR P/W (19);
- P RR P/W, D RR P/W (20);
- POWER(20);
- power relay – R3.
Fuses for the socket in the cabin - PWR OUTLET (12), for the seats - DP/SEAT, PP/SEAT (10, 11), for the fuel pump - STA (17).
Replacing fuses for Toyota Land Cruiser Prado 150
The occurrence of a problem with an electrical appliance (the signal on the panel does not light, the air conditioner does not work, etc.) is most often associated with a malfunction of the corresponding part. Due to a power surge, it burns out - it is replaced with a new one. This procedure is simple, but before carrying out it the driver should familiarize himself with some rules:
- Turn off the ignition and disconnect the battery from the main system to avoid electric shock.
- Select the same element by marking and function. For example, the number of the HORN horn fuse for Toyota Prado 150 is 12, so to replace it you need to take the same one.
- Do not use metal tweezers.
Changing fuses Prado 150
It often happens that drivers do not consider it necessary to replace fuses in a timely manner But, if the circuit burns out or starts to melt , the driver does not know what to do first.
Before you start replacing the element, you need to make sure that it has burned out . To do this, you need to identify the block associated with the damaged devices, and then select a specific fuse . The element to be replaced must be removed from the block using pliers or tweezers . The diagram needs to be carefully studied.
If external defects , the element must be replaced . You can purchase a new electrical fuse for the Prado 150 at any car store, but it is important to choose a good spare part . The sample should be carefully examined to ensure that there are no distortions , notches on the metal part, or manufacturing defects in the plastic .
Before installing a new block, it is tested:
- A spare electrical fuse is purchased.
- Wiring is attached to the metal parts of the fuse and connected to the battery.
- A high-quality element will burn out, a defective element will melt.
- If a defective part is mistakenly installed in the machine, it will cause a fire.
- After the test, you can start replacing - install the working part in place of the old one in the Prado 150.
- Before directly installing the circuit, you need to eliminate the conditions that led to damage to the previous element.
There are three possible fuse sizes: mini , medium , maxi . In each case, a special place in the block is allocated for it. The current strength in the fuse must be greater than the current strength in the corresponding device; it can be determined by the color of the case . There should be no bare wires on the circuit, as they can again damage the circuit, causing a short circuit. At the end of the work, you should make sure that all electrical circuits are working properly. The unit has been correctly replaced if there are no problems in its functioning, as well as in the operation of other systems.
Video
Fuse blocks
Fuses and relays are necessary in a car in order to ensure the safe and uninterrupted operation of devices, sensors and systems that are part of the electrical circuit.
The presence of these elements allows you to avoid sudden voltage surges with subsequent short circuits. Thus, the service life of the vehicle is significantly increased.
The Toyota Land Cruiser Prado 150 has two built-in fuse and relay blocks:
- Basic. Located under the hood of the vehicle. Sometimes this block is also called the motor block.
- Mounting. It can be found in the car interior.
Next, each of the blocks will be discussed in more detail.
Main unit
The main block contains most of the fuses and relays. They are responsible for the performance of many systems.
The location diagram is shown in the image below. Also, after the diagram there is a table showing a breakdown of the main elements of the unit.
| Designation | Purpose |
| 2 | Responsible for the operation of the RTS heater. |
| 5 | Controls the operation of the rear window heating. |
| 6 | Responsible for turning the rear fog lights on and off. |
| 12 | Provides timely and uninterrupted sound signal. |
| 20 | Controls the operation of the condenser fan. |
| 23,24 | Provides switching on and off of high beam headlights. |
| 26 | Responsible for the performance of the windshield wiper. |
| 34 | Regulates the operation of the fuel pump. |
The block also contains fuses and relays that ensure the functionality of towing the vehicle, are responsible for the lighting inside the car, and turn its side lights on and off.
Among other things, you can find elements with the help of which fuel injection is carried out, the starting system and navigation system come into operation. Finally, some of the elements of the block are designed to accommodate additional fuses if necessary.
A more detailed diagram is located under the cover of the main unit. Also, together, the car from the manufacturer is equipped with appropriate documentation, with the help of which you can find the necessary element and find out what it is responsible for.
Mounting block
This unit is located inside the Toyota Prado 150 car. You can find it under the dashboard, located on the driver’s side.
The layout of fuses and relays is shown in the image. After the image there is a table with a breakdown of the main elements.
| Designation | Purpose |
| 1 | Responsible for turning the cigarette lighter on and off, ensuring the operation of the socket in the car. |
| 2,13 | Responsible for the operation of the electric mirror motor, it also ensures the operation of the air conditioning system and audio system. |
| 3 | Responsible for turning on and off the reversing lights. |
| 12 | Ensures the functionality of fog lights. |
| 15 | Responsible for the vehicle starting system and supplying fuel to the fuel pump. |
| 17,27 | Organizes the operation of the electric power steering. It also ensures the functionality of the windshield wipers and regulates the steering and speed sensors. |
| 20 | Provides seat heating. |
| 24,25 | Regulates the operation of the electric window drive. |
| 32 | Responsible for illuminating switches and instrument panel. |
| 33 | Regulates the operation of side lights. |
Also, the fuses of this unit are responsible for the operation of devices and sensors inside the cabin.
Fuse links in the Prado 150 interior
In addition to the blocks under the hood, the Prado 150 has circuits in the interior. The Prado 150 cabin fuse box is a complex system under the panel on the driver's side (usually on the left). It provides many processes in conjunction with the circuitry under the hood. Below is a diagram of the arrangement of parts in the block.
1 – cigarette lighter fuse, as well as an electrical outlet. Elements 2 and 3 are distinguished by their versatility - they regulate many important systems, including the electric motor of the rear-view mirrors, air conditioning, audio system, navigation, parking assistance, reversing lights, interactive car display and more. The fourth element is necessary for proper towing operation, the fifth regulates the air suspension. Number 8 is directly linked to the power driver's seat. The ninth, as a rule, is activated in emergency situations; it is needed to lock the doors and open the hatch. To regulate the position of the steering wheel, the eleventh element of the circuit works. Number 12 ensures safe movement in bad weather conditions and in conditions of poor visibility; it participates in the operation of fog lights.
14 – cabin air conditioner, 15 is necessary for proper operation of the starting system. Block parts with numbers 16, 22, 23, 24, 25 are car window lifters. Element 16 is also multifunctional - it controls the operation of the gearbox, steering, adjustment of the steering wheel, the automatic process of turning on the wipers, heated mirrors, and more.
Sensors 17 and 19 are no less multifunctional - they ensure the operation of the gearbox, window wipers and steering, and are also necessary for the proper operation of the turn signals. The functionality of number 18 is similar to the previous ones. Electric fuse 20 provides heated car seats, 21 is directly connected to the electric drive of the front right seat, 26 is connected to the sunroof.
The operation of the windshield wipers is regulated by the twenty-seventh element of the circuit, and the twenty-eighth works with cleaning the rear window. Fuse 31 ensures the safety of the devices. Circuits 30, 32, 33 are involved in many processes that occur in the car, including turning on the airbags, the intelligent and mechanical starting system, the steering unit, turning the headlights and fog lights on and off, the operation of the user display, rear-view mirror switches, and more.
