What is fi ECU fuse?

An engine control unit (ECU), also known as an engine control module (ECM), is a type of electronic control unit that manages a set of actuators in an internal combustion engine. In a fuel injection (FI) system, the ECU controls the amount of fuel injected into the engine.

What does fi main fuse mean?

FI = Fuel Injection = part of the full acronym PGM-FI = Programmed Fuel Injection. Fuse 14 is "FI Sub", because it's the fuse for the PGM-FI subrelays as well as other stuff: Doesn't seem to control anything specifically SH-AWD related.

What is the IG1 fuse?

The 40A IG1 fuse provides power to the ignition switch. The ignition switch controls 4 separate circuits. The 4 circuits of the ignition switch provide power to about 16 other fuses.

What is the ACC fuse in a car?

What is ACC in car wiring? It saves battery power for when you need to operate vehicle components without engine being on. The ACC wire offers power/electricity only when you insert car key into ignition switch and turn it to the left. The ACC wire needs to be connected to car igniton.

What happens if ECM fuse is blown?

If an electrical wire gets burned or damaged, the cables pointing to the ECM is going to short-circuit. Once that happens, a power surge can result, and if it the exceeds the fuse's limitations, the fuse is going to blow.

Hyundai Santa Fe - Blows ECU Fuse

Where is ECM fuse located?

The power distribution center, or fuse block, located under the hood houses most or all of the vehicle's fuses and relays. It contains a relay for the ECM that is powered up when the ignition key is turned to the on position. This ECM power relay acts as a switch that supplies power to the ECM.

What does the engine fuse do?

Engine-compartment fuse panel

The main job of the fuse is to protect the wiring. Fuses should be sized and located to protect the wire they are connected to. If a device like your car radio suddenly draws enough current to blow the fuse, the radio is probably already toast.

What controls the electronics in a car?

An electronic control unit (ECU), also known as an electronic control module (ECM), is an embedded system in automotive electronics that controls one or more of the electrical systems or subsystems in a car or other motor vehicle.

What does the engine management fuse do?

What Does Engine Management Fuse Do? There's a computer known as the ECM1; it has a fuse installed, and thus, a component component will blow up if anything surges on or damages its electrical components.

Where is the PGM-FI relay located?

The PGM-Fl main relay actually contains two individual relays. This relay is located at the left side (LHD) or right side (RHD) of the cowl. One relay is energized whenever the ignition is on which supplies the battery voltage to the ECM, power to the fuel injectors, and power for the second relay.

Why is my PGM-FI light on?

The PGM-FI light just indicates the computer detected a problem, a sensor failed to report data or something seems 'out of bounds' for the computer (ECU) to process. The PGM-FI light is reset during the start sequence but the stored code is not erased.

How do I know if my main relay is bad?

Common signs include the engine not starting, inability to stay running for a long time, and the Check Engine Light coming on.

What does ECU stand for?

An electronic control unit (ECU) is a small device in a vehicle's body that is responsible for controlling a specific function.

What does an ECU reset do?

"Resetting the ECU" is the process of clearing all the long term memory from the ECU's memory. These variables trim idle speed, fuel, spark, and more. The ECU will also store trouble codes for diagnostic capability.

How much does a ECU cost?

The part alone can cost between $1,000 and $3,000, depending on the make and model of your vehicle. Fortunately, an ECU can be repaired or reprogrammed in many cases—thus preventing the need to actually replace an ECU.

Why does my PCM fuse keep blowing?

Check the oxygen sensor wiring for melted wires against the exhaust. If that is ok then unplug the harness on the top of the transmission then see if it blows the fuse. The internal wiring could short against the inside of the pan or the case of the transmission.

How do I know if my cars computer is bad?

What does St mean in fuse box?

ST = Starter. And those arent fuses, they are actually relays.

What is IG2 main fuse?

IG2 fuse supplies constant battery voltage to one side of IG2 relay. When ignition is turned on, voltage is supplied from ignition switch to other side of IG2 relay which is then energized. When IG2 relay is energized, it provides battery voltage to fuel injectors and ignition coils.

What does ACC wire connect to?

ACC wire connects to the accessories wire from the ignition switch so when you turn the key on acc you can listen to the radio without starting the car.