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Modern cars with the latest technology already use the ECU or Electronic Control Unit. This car ECU component is very useful for four-wheeled vehicles that already use injection technology. However, the actual ECU is not a new technology.

Let’s look at the function of the ECU on the car, the type of ECU, the cause of the damaged ECU and how to fix it, as well as the price of the car ECU.

ECU Function on Car

The function of the car ECU component is as the main electronic circuit system to control other parts. The ECU can affect the car, some of which are as below:

  • Mixing fuels easily and precisely
    For the car to run, the fuel must be mixed with air. This car’s ECU components can mix it properly because the system is already computerized. Before using the ECU, fuel mixing, engine rotation speed, and ignition timing are done mechanically. The ECU makes this process easier.
  • More precise fuel supply
    The fuel used during the combustion process must also be appropriate. The ECU that already uses a computer program can access the data so that the movement of the engine according to the needs of the fuel dose.
  • Determine the fuel injection duration
    In addition to the number, the ECU also serves to determine the duration of fuel injection. So that the injector can supply fuel at the most appropriate time. The combustion process becomes optimal.
  • Setting up other systems
    In addition to the car’s combustion system, using the ECU can also regulate other systems such as the engine cooling fan, turning on the car alarm, identifying car keys, car air conditioning, and other functions.
  • Indicates component damage
  • With the ECU component, the car can also detect component damage, and then the damage is displayed on the dashboard. So the driver does not need to check the components too often.

Car ECU Component Type

ECU turns out to have at least 7 types, including TCM, ECM, BCM, and others. What do all these types mean?

  1. TCM (Transmission Control Module)
    This TCM is a module in cars with automatic transmissions. The function of this module is to adjust the transmission shift according to engine RPM and driving conditions.
  2. ECM (Engine Control Module)
    This type of ECU regulates engine work. The engine work starts from starting, turning on the spark plugs, supplying fuel, to the engine cooling process.
  3. BCM (Body Control Module)
    This car ECU component regulates the work of the car’s electrical system. Among them are lights, wipers, horns, to entertainment features in the car cabin on the dashboard.
  4. PCM (Powertrain Control Module)
    As the name suggests, this module regulates the performance of the power train. So that the flow of power from the engine to the wheels runs efficiently. This module is found on cars with four-wheel drive or four-wheel drive
  5. ABS Control Module
    This module is used in cars with brake systems that have ABS technology. This module plays a role so that the tires do not slip and regulate braking when driving on slippery roads. It can be said to also play a role in safety systems such as ESC (Electronic Stability System) and HSA (Hill Start Assist).
  6. HVAC Control Module
    This ECU module plays a role in controlling the circulation in the car cabin according to the weather conditions outside. This module is found in cars with automatic air conditioning systems.
  7. Airbag Control Module
    The last is the ECU module to develop airbags (airbags) when there is a hard impact on the car.

Causes and Characteristics of a Damaged Car ECU

Car ECU components can be damaged, just like any other car component. When the car’s ECU is damaged, it will be very troublesome. This damage generally occurs due to several things, for example, the long-distance traveled and the old age of the vehicle. Injection cars aged 10 years and over are usually susceptible to this damage.

Some of the characteristics below you can feel when the ECU component is damaged. If you feel or find the signs below, you should check at the nearest repair shop.

  1. Difficulty starting the car.
  2. The use of fuel becomes wasteful even though the distance is not too far.
  3. The engine often stalls when the car is moving.
  4. Engine power feels reduced and heavy when driving.
  5. The check engine light on the dashboard continues to light up. It could also be that the lights go out completely.

How to Repair ECU

Before taking the car to the repair shop, you should know what the repair shop mechanic will do for repairs when the car’s ECU is damaged. So you can discuss with the technician when doing their job.

First, the mechanic will check the PCB path. whether the line is exposed to liquid or there are broken parts. Second, the electronic components on the car’s legs will be checked. Then the third, the Elco (electrolyte capacitor or electrolytic capacitor) of the car will be replaced with Farad (unit of electrical capacitance) and the same voltage.

If necessary, a physical inspection will be carried out to determine the location of the damage as a whole. In addition, maybe the car will also be dismantled so that the components in the car can be checked with a multitester.

Car ECU Price

What if it turns out that the car’s ECU cannot be repaired? The solution is to replace the car’s ECU as a whole. Car ECU components have a price of around IDR 1 million and above. This price depends on the type of car and its quality.

There are also used or removed ECUs from other cars. The price can be cheaper if you use a used ECU. Meanwhile, as mentioned above, the price is also influenced by the sophistication and type of car. European cars usually have a higher ECU price than Japanese cars.

For example, the ECU price for the Toyota Avanza is only Rp. 2 million, while for the Camry it can be Rp. 4 million. ECU prices for European cars can be much more expensive, up to IDR 30 million. This includes coding services.

Therefore, you need to carry out regular car maintenance so that you can detect early if there is damage to the car’s ECU components.

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