How does cruise control work on Camry 40?

Cruise control is designed to simplify the control of the vehicle, including during long trips. Regardless of the make and modification of the car, the driver a priori gets tired of driving. This negatively affects safety, reaction accuracy, attentiveness, the road situation is less controlled, accidents and collisions are allowed.

The main purpose of cruise control is to automatically maintain a given speed limit without the active participation of the driver. The shape is in the form of a lever - a regulator with a contact board. Fixation with two fastening bolts to the steering column of the car.

Principle of operation

When connected to the central fuel system of the Toyota Camry 40, the sensors read and analyze the throttle position online, recording speed and revolutions.

There are three speed control systems: proportional, integral, derivative. The higher the class of equipment, the better its technical characteristics. The Toyota Camry 40 is equipped with an average modification without a number of additional functions. Later versions of the Japanese brand are equipped by default with cruise control with maximum parameters, ESP and ABS modules.

Climate features in Kamra

Depending on the body model, cars are equipped with single-zone, dual-zone, and in the latest versions. Three-zone climate control system. The latest version is the most functional and easy to use. There are several types of climate systems:

On the Climate Control Camry 30, the old model is usually installed without a display. But later “thirty” appeared with LCD displays;
40 bodies are equipped with newer modifications of units with single-zone and dual-zone control, equipped with a liquid crystal display and push-button control;
The 50 body Camry features a modern display unit that is controlled by buttons.

Few people know, but units with displays allow you to fully diagnose the sensors and actuators used by the car's air conditioning system.

How does passive cruise control work?

PCC cruise control is an indispensable assistant on long car trips. To activate it, you need to briefly press the button on the control lever with your finger. The fixed speed will be maintained until the function is reset. When you press the accelerator or brake pedal with your foot, the speed increases or decreases. To return to the previous mode, simply remove your foot from the pedal.

summary: allows you to use previous (last) settings, parameters.
set: programming button, setting microprocessor parameters;
on / off - turns cruise control on and off. The yellow (green) indicator on the center instrument console lights up as an activation indicator;

How to understand what is wrong and how to fix it?

Task No. 1. One of the problems with this equipment is that one of the functions fails, for example, when you turn on the fan, this function works on the passenger side but not on the driver side. Also, the system may not respond to temperature control, but after a while it will start working normally.

The best option would be to contact a service center and install hardware diagnostics, but first you can check its operation yourself. To do this, turn off the ignition and hold down the automatic mode and recirculation buttons, then turn on the ignition and release the previously pressed buttons. You should see an error code on the monitor and determine the cause of the failure.

Task No. 2. Another fairly common reason. Air conditioner failure. It stops cooling the air, turns on the compressor, runs for 5 minutes and stops cooling. At the same time, the freon level and pressure are normal.

If you notice similar changes in the performance of your machine's equipment, you should consider checking the thermistor located on the evaporator fins. By assessing the temperature, it sends a signal to the air conditioning computer to turn off the compressor if the evaporator is about to freeze.

Task No. 3. Cold, barely warm air blows into the front seat passenger's legs, and the driver is very hot at the same temperature.

In this situation, you can try replacing the cabin filter and disconnecting the battery and then diagnose the problem.

If warm air starts blowing when you turn on the air conditioner, and the climate control shows an AC error, you need to check the condition and tension of the belt.

In some cases, it may be advisable to replace the climate control unit in your vehicle. This will help improve the functionality of your car's climate control system and even improve its interior. You can replace the faulty unit with a European one.

Task No. 4. Often Toyota Camry 40 stops using climate control on the steering wheel. This happens in cases where the driver tries to repair the steering wheel, removes it and puts it back in place. Under the steering wheel there is a loop with wires that are responsible for the operation of the functions, they can be accidentally damaged or torn off, and the loop itself can break, causing the above problem.

Task No. 5. Warm air blows, blows onto the passenger seat, the air is slightly warm, and then at speed while the radiator pipes are hot. If all the air ducts are sealed and no vision problems are detected, the cause may be the radiator.

This car model is quite modern, and its equipment is quite complex. So you don’t have to spend money on replacing it or expensive repairs; don’t be lazy to diagnose it in a timely manner.

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Adaptive cruise control

ACC cruise control is an upgraded version of the previous PCC. The main difference is that the system keeps the car at a certain distance from the car in front. The program automatically reduces the speed and works in systematic scanning mode. In the event of a risk of collision, the system warns the driver of the danger in advance.

To measure the distance to the vehicle ahead, one of two types of radar is used: microwave and infrared (lidar). The last option is a modernized development of the first.

Replacing the climate control unit

If the climate control on the Camry SV20 does not work , then by replacing it, you can solve 2 problems at the same time. Increase the functionality of the car's climate system and improve the interior. The fact is that climate size 30 is quite similar to “twenty”. There is a slight difference in the wiring, but there are more than enough working circuits for connecting the air conditioning system from another car model.

In the same way, you can answer questions about how to make climate control in a Camry America . It is enough to replace the faulty unit with a European one. But keep in mind that errors may occur during self-diagnosis, since American car models are equipped with additional sensors.

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Every driver wants the most comfortable driving conditions, so climate control systems are an integral part of every modern car. This system includes functions to control temperature, humidity and the chemical composition of the air in the cabin.

All Japanese cars and the Toyota Camry 40 in particular are distinguished by increased reliability and comfort, including an automatic climate control system that provides the driver and passengers with an excellent driving environment. The system can be controlled using a convenient control unit, which allows you not only to control the air temperature, but also to direct the air flow. But despite all the benefits, the system still breaks down over time, and there are reasons for this.

READ Replacing Thermostat VAZ 2112 Video

Which Camry 40 trim levels have cruise control installed?

Not all Toyota Camry 40 models are equipped with cruise control (hereinafter referred to as PCC) by default.

XV40 (06.2009 - 07.2011) fourth generation restyling: 2.4 AT Elegance (2AZ-FE), 2.4 AT Elegance + (2AZ-FE), 2.4 AT Prestige (2AZ-FE), 3.5 AT Luxe (2GR-FE).
XV40 sedan (01.2006 - 05.2009), fourth generation: 2.4 AT Elegance (2AZ-FE), 2.4 AT Prestige (2AZ-FE), 3.5 AT Luxe (2GR-FE);

The type of transmission does not affect quality and functionality. Installation is permitted on both automatic and manual transmissions.

A little about compressor blocking

A blocked compressor does not mean that it is stuck due to foreign objects.

Compressor blocking

The fact is that when the electromagnetic clutch is disconnected, only the pulley with the drive belt rotates. And when you press the AC button on the climate control unit, its signal activates an electromagnetic clutch that connects the pulley and the rest of the compressor mechanism. Its speed is regulated by a special sensor that transmits signals to the computer. If there is a discrepancy between the compressor speed and the engine speed by more than 20%, the air conditioning system will automatically turn off the solenoid, thereby stopping the compressor. At the same time, the AC indicator on the climate panel will flash once per second.

Therefore, if you turn on the air conditioner from the ducts, warm air and climate control for Toyota Camry 40 shows an AC error, the first thing to do is to check the condition of the belt and its tension.

What to do if you have problems with the cruise control

The failure of the unit took me by surprise. Even systematic technical control does not guarantee the quality and duration of work.

the PCC power indicator does not show: check the integrity of the electrical network with a multimeter.
speed mode does not decrease when pressing the “SET / -” switch: Solution: Replace the switch or check the continuity of the circuit with a multimeter;
increasing the range of deviations from the set speed, jerking when moving, uncontrolled acceleration, deceleration. Solution: The speed sensor is faulty and needs to be replaced with a new one. The electronic engine control unit is faulty;
the speed does not increase or is not restored by pressing “RES / +”: mechanical damage to the button, short circuit of the wiring;
pCC does not switch off when the brake pedal is pressed. Solution: circuit damage, fluid leak. Prevention, replacement of the electronic control unit;
PCC is activated at speeds below 40 km/h without automatic shutdown: replace the sensor with a new one;
PCC is not turned off by a mechanical button, but is turned off by pressing the brake pedal. Solution: Short circuit or open circuit. Checking circuit continuity with a multimeter, replacing damaged cable sections, ECU diagnostics;

Video: How to Use Climate Control Camry 40

We are trying to carry out self-diagnosis of climate systems in cars, we must perform the following steps:

Stop the engine and turn off the ignition.
Simultaneously press the Auto button on the climate control panel and the button that activates the internal air circulation.
While holding the buttons, turn on the ignition. At the same time, all indicators located on the remote control display flash, indicating the start of the self-diagnosis process.
After checking the display and diagnosing the sensors, the display will show an error code in the place where the temperature is displayed normally.
If 2 or more errors occur, they are displayed in order, starting with the smallest code.

Climate control in Toyota Camry It is equipped with a significant number of electric drives, the effectiveness of which can be checked when switching to self-diagnosis mode. To do this you need:

Run the system self-test process as described above, then press the button that activates air circulation inside the cabin. Important: Diagnostics must be performed with the engine fully warmed up.
During the test, the different fan operating modes will turn on alternately with a delay of 1 second, and the leaf will open/close.
You can increase the interval between modes by pressing the windshield fan button.
To exit test mode for drives, relays and fans, press the AUTO button. In this case, the control unit will switch to sensor test mode.

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The diagnostics is completed by pressing the Off button.

Climate control in Toyota Camry

Toyota Camry climate control unit The memory clearing function is supported. This should be done after eliminating errors that occurred during self-diagnosis. This is done as follows:

The control unit enters diagnostic mode.
The front and rear defroster buttons are pressed simultaneously.
Memory error cleared.

There are many reasons for this: the climate control on a Camry 50 or 40 shows errors during self-diagnosis: from lack of contact to sensor failure.

Possible malfunctions that occur during climate control operation:

The sensor malfunction was corrected by replacement;
Control unit malfunction. Often, to solve the problem, it is enough to simply disassemble it and solder all the contacts;
Connectors or sensors are damaged. This often occurs as a result of unqualified intervention in the electrical equipment of the car;
Low tension of the compressor drive belt or damage to it. In this case, check the integrity of the belt;
Failure of the electromagnetic communication sensor installed in the compressor;
Compressor malfunction or blockage;
Leaking or missing refrigerant or not meeting the level set by the car manufacturer;
There is no contact with the instrument panel or engine ECU.

Sequencing

insert the battery clamp, insert the key, turn, start the engine.
pull out the PCC lever through the internal hole, fasten it with two bolts to the steering wheel frame;
the car is in transport position;
Unscrew the airbag mounting bolts and set them aside. Removing contacts from the pillow is strictly prohibited. The usual length on the sides is sufficient;
remove the two standard plugs on the sides of the steering column. You can use a flat head screwdriver;
We connect two terminals to the standard contacts. You can't go wrong as you only need one free chip to connect;
the final stage is installing the airbag assembly in its normal position, fixing it with bolts;
disconnect the negative terminal of the battery to avoid a short circuit;

For the first five minutes, engine speed will not exceed 400 rpm. This is normal practice as the system reconfigures the ECM for new equipment. At the end of idling, the speed will return to its previous value.

Move the selector to the “Drive” position, accelerate the car to a speed of 60 - 80 km/h, activate the PCC by briefly pressing the lever.

Mechanically move the lever up and down to adjust the speed, increase or decrease. To turn it off, use a standard button or brake pedal. When PCC is activated, the green warning light on the center instrument console lights up, and when disabled, it goes out.

Installation of PCC on different types of gearboxes

The least problematic option is a manual transmission. Just install correctly, insert the chip into the contact card and that's it. The engine ECU recognizes the new equipment and automatically adds it to the list of standard equipment.

Worst option with automatic transmission. Despite the general susceptibility, some Toyota Camry 40s do not see connected equipment. The solution to the problem is simple: make the engine ECU blink. The service is paid and is carried out exclusively in car services with portable scanners. It is not recommended to reflash the ECU data at the stage of warranty service of a technical device.

Subject to installation technology and moderate operation, the service life is more than 200,000 km.