What are the components of the ECU in a car?
Some of the other components in the ECU that support the processor are: Analog-to-digital converters – These devices read the outputs of some of the sensors in the car, such as the oxygen sensor.
Why does an ECU need a signal conditioner?
Since the processor on the ECU is a digital device, it needs a component that can convert the digital number into an analog voltage. Signal conditioners – Sometimes the inputs or outputs need to be adjusted before they are read.
How many volts does a 3 foot DC coil lose?
Using a voltage drop calculator, 10 amps @ 12 V dc, 20 foot #10 wire = 6.7% voltage drop = 11.2 volts at the coil; versus a 3 foot run loses 1% = 11.9 volts at the coil.
What do you need to know about igniters in an ECU?
Those without igniters need a high current drain from the ECU to sink the coil’s primary current (along with high voltage protection on the drain). Those with igniters have separate +12V primary supplies and grounds, and the ECU need only control a low voltage ‘TTL’ signal to the coil (typically 5 Volts).
How many volts does an ECU usually have?
Then you will have a malfunctioning ECU. The average ECU is expected to have at least 9 volts, but preferably 12 volts. There is wiring that runs into the harness of the ECU where you can check the voltage amount.
Where does the battery ground go on an ECU?
Running proper grounds from the battery to the engine block, frame and body, is just as important as running the ECU’s main power directly from the battery. Connect the main battery ground to the stock location on the alternator bracket with a star washer and make sure the surface is clean.
How can I tell if my ECU is bad?
There is wiring that runs into the harness of the ECU where you can check the voltage amount. All you need to do is connect a voltmeter gauge to it. This device will be able to detect how much voltage is running through the ECU. If the voltage is 6 or less, then this is likely causing your ECU problems.
What is the ECU in a car called?
The ECU is the engine control unit of your vehicle. It is also often referred to as the PCM (powertrain control module) or ECM (engine control module). This electronic module is a built-in computer which your vehicle depends on for managing a variety of its systems and functions.