MotorData Professional

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Pinouts of electronic control units (ECU)
in MotorData Professional software

We speed up the detection of faults and repair of electrical equipment
Toyota rav4 pindata

MotorData Professional is a great tool for the auto electrician

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MotorData Professional software is an ideal option for auto electricians and auto diagnosticians to eliminate all possible problems with the car’s electrical system.

Among the advantages of the program: more than 20,000 interactive electrical circuits and more than 4,000 pinouts of electronic control units. MotorData contains data on more than 600 models from leading manufacturers in Japan, Korea, China, Russia and other countries.

20 000

interactive wiring diagrams

60 000


4 500

ECU pinouts

Why do you need to know the exact pinout of ECU connector pins?

To connect new devices, for example, car alarms, xenon headlights or tuning, it is important for a car electrician to know how to connect them to the car’s electrical system. An auto electrician must understand which contacts of the ECU connectors and wires and sensors must be connected to each other for correct and error-free operation of the car. Each contact on the connector has its own function and purpose, so correctly connecting wires and sensors to the corresponding contacts is an important step when installing and configuring a car alarm, additional equipment, lighting or instruments.

Incorrect connection can lead to incorrect operation of the system engine control, diagnostic errors or even damage to the control unit.

Risks of incorrect connection of ECU contacts

Incorrectly identifying the electronic control unit (ECU) pinout can create risks, including potential damage to the ECU and connected components, as well as a safety hazard. If the pinout is not defined correctly, incorrect voltages or signals may be sent to the ECU, causing malfunctions or permanent damage to the unit and other vehicle systems. This can result in costly repairs and troubleshooting.

In addition, safety-critical functions such as engine management and emissions control may be impaired, affecting vehicle performance and emissions compliance. Therefore, it is extremely important to accurately determine the ECU pinout to ensure correct connections and prevent these risks.

Why choose pinouts in MotorData Professional?

MotorData has the following advantages for diagnosticians and technicians:

  • Quick access to 4500 pinouts of ECU contacts (no need to search on forums and the Internet);
  • Pinouts of popular car models Japan, China, Korea, Russia;
  • Images of connectors from the side of blocks and from the side of wiring harnesses;
  • Pop-up names of outputs (connector pins) when hovering the cursor;
  • Search for connector pins by element name;
  • Links to go to electrical circuit diagrams;
  • Reference oscillograms to compare with current indicators for possible errors;
  • Values voltages and conditions under which tests need to be carried out.

ECU pinouts in MotorData by system

MotorData Professional presents pinouts of ECU contacts for the following systems:

  1. Fuel injection system.
  2. Ignition system.
  3. Engine management system.
  4. Emission control system
  5. Automatic transmission system
  6. Anti-lock brake system
  7. Stability control system
  8. Cruise control system
  9. Climate control system
  10. Security system

ECU pinouts in MotorData by car

MotorData Professional provides ECU pinouts for the following car brands:
  • Japan: Acura, Daihatsu, Datsun, Honda, Infiniti, Isuzu, Lexus, Mazda, Mitsubishi, Nissan, Scion, Subaru, Suzuki, Toyota;
  • Korea: Daewoo, Genesis, Hyundai, Kia, SsangYong;
  • China: BYD, Changan, Chery, DongFeng, FAW, Foton, GAC, Geely, Great Wall, Haval, JAC, Lifan;
  • Russia: Lada, GAZ, UAZ, PAZ;
  • And other countries.

Examples of pinouts and wiring diagrams for cars in MotorData Professional

Nuances of connecting new devices and determining pinouts

Determining the pinout of an electronic control unit (ECU) involves understanding the connections and functions of the pins on the ECU. Here are a few steps to help you determine the ECU pinout:

  1. Search for the correct wiring diagrams with the correct pinouts in MotorData Professional. ECU pinouts vary depending on the specific make and model of the ECU. It is important for an auto electrician to determine in MotorData the necessary systems, ECUs, locations of systems and components, grounding points, sensors with inputs and output signals for a specific model.
  2. Identification of contacts on the ECU connector. You can count the number of pins on a connector by looking at the back of the connector where the wires come out. The mating harness connector is then numbered by looking at the reverse side. Look in the MotorData Professional software for the wiring diagram and which wires go to the connectors to make it easier for you to understand the numbering and color of the wires.
  3. In some cases, it is recommended to visit online forums and watch videos on Youtube that will introduce you to understanding the ECU pinout and connections.
  4. Look at vehicle maintenance manuals. The manuals are a reliable source of vehicle-specific service and repair information.
  5. Remember that ECU pinouts may vary depending on the specific ECU make and model. Please check MotorData for the appropriate pinout diagram for your specific model.
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