The car turns on the key indicator light does not light up, the key turns on the fault light does no

Under normal circumstances, when we insert the key in the vehicle and open the key door, the instrument lights will have a process of all lighting, and some of the lights will go out by themselves after a while, and the engine lights will go out after starting, we call this situation the instrument indicator self-test. Under normal circumstances, the vehicle instrument lights need to be self-tested. If you don't self-test, it's faulty.

Today, we take the engine fault light as an example to illustrate that the possible failure reasons for the self-test light not to light are:

After the car opens the key, the engine indicator does not light up and cannot start, mainly because the circuit is not working, specifically:

1. The two contacts between the battery and the starter are loose;

2. The two contacts between the starter and the key door are loose;

3. The two contacts between the key door and the switch are loose;

4. The computer board socket is bent, deformed and loose, and the jack is oxidized and rusty. Disassemble the socket of the computer board to check the jack, and use a steel needle to remove the rust. ECU socket deformation correction: use a hair dryer.

After properly heating the socket, quickly insert the ECU, tie it tightly with tape, and release it after cooling to restore the normal shape of the socket.

5. Check the total fuse box and ECU fuse.

If the instrument indicator is not lit, first check the power supply fuse of the dashboard, and replace it if it is blown. Disassemble the dashboard, the lights are generally at the back of the dashboard, replace the lights that are not lit, and generally the individual lights are not lit to indicate that there is no problem with the fuse and wire, the main reasons are as follows

1. The lamp of the dashboard is damaged and needs to be replaced in time;

2. If the power supply line of the dashboard is broken, there is an open circuit or short circuit, which will also cause the car dashboard to not light up;

3. If the power supply fuse of the car dashboard is broken, there will naturally be no power supply, and the dashboard will not light up.

Precautions in the use of the car dashboard:

1. When the indicator light is on, the odometer should be observed immediately, if the cumulative mileage reaches or exceeds l00,000km, the timing toothed belt must be replaced, otherwise the timing toothed belt may break, so that the engine can not work normally.

2. After replacing the new timing toothed belt, it is necessary to open the rubber plug outside the reset switch on the mileage dial, and press the reset switch inside with a small round bar to extinguish the indicator light of the timing toothed belt.

3. After replacing the new timing toothed belt, remove the odometer and adjust all the readings on the odometer to the 0 position.

2. The two contacts between the starter and the key door are loose;

3. The two contacts between the key door and the switch are loose;

4. The computer board socket is bent, deformed and loose, and the jack is oxidized and rusty. Disassemble the socket of the computer board to check the jack, and use a steel needle to remove the rust. ECU socket deformation correction:

After heating the socket properly with a hair dryer, quickly insert the ECU, tie it tightly with tape, and release it after cooling to restore the normal shape of the socket.

5. Check the master fuse, ECU fuse, main relay, etc.

Hello 1. Is the battery out of power? Is the battery post virtually connected?

2. Is the engine computer insurance burned? Check the fuse.

3. The key switch is damaged, etc. Screw the key instrument light is not lit, simply put, the engine computer is now out of power (or the dashboard is damaged, the probability is not large) to check the above problems, you may also need to check whether the live wire enters the computer, if the computer is not powered, the oil pump, high-voltage electricity will not have, do not have to find faults, just need to find the reason why the computer is out of power.

Check the power fuse, it may also be caused by a short circuit in the CAN line or a problem with the computer

You can try to press the horn first, according to the loudness of the horn to judge the power of the battery, if the horn does not sound or the sound is very small, it means that the battery is losing power; In addition, you can also try to run the key, and if there is no sound, you can basically determine that the battery has no power.

The common faults of low-voltage circuits are insufficient battery storage, poor line contact or disorderly knotting, poor battery tie-up, damage to distributors or Hall sensors, damage to ignition switches or poor wiring, and damage to transistor ignition control units or poor wiring.

Common faults in high-voltage circuits are high-voltage wire detachment or leakage, breakdown of distributor cover, ablation and breakdown of distributor distributor head, excessive or small spark plug electrode gap, excessive carbon deposition in spark plugs, damage to spark plug insulator, damage to ignition coil or wiring off.

Check if the fuse is damaged, if it is normal it is a problem with the ignition switch and wiring, light bulb.

Answer: If the indicator light of the remote control is not on or is very dim when pressing the button, then the battery of the remote control may be insufficient; If the remote control indicator is still not on after replacing the battery, you should check whether the positive and negative polarity of the battery is reversed and whether the battery is in good contact with the mount; If there is no problem with the above check, but the remote control indicator is still not on, you should check whether the keys are damaged, if you press some key indicators and some keys do not respond, it is likely that the keys are damaged, or the remote control is damaged.

What happens when you turn on the watch face and it doesn't light up?

When you open the key, the instrument doesn't light up or ignite, and the door doesn't lock. What is the reason.

If the remote control indicator is not on or is very dim when the button is pressed, then the remote control battery may be low; If the remote control indicator is still not on after replacing the battery, you should check whether the positive and negative polarity of the battery is reversed and whether the battery is in good contact with the mount; If there is no problem with the above check, but the remote control indicator is still not on, you should check whether the keys are damaged, if you press some key indicators and some keys do not respond, it is likely that the keys are damaged, or the remote control is damaged.

The solution to the car key dashboard not lighting up and not being able to start the car is: you can try to press the horn firstJudge the power of the battery according to the loudness of the horn, if the horn does not sound or the sound is very small, it means that the battery is losing power; You can also try to run the key, and if you listen carefully, you can basically determine that the battery has no power.

The instrument panel does not light up and cannot be started, and there are problems with the car battery, such as the battery life cycle reaches the limit, the pile head of the battery is loose, the contact is poor and the pile head is oxidized, which are all battery problems, and it is also necessary to check whether the starting fuse is burned out.

Precautions for the use of car keys.

1. Ordinary key: First, the key needs to be released immediately after ignition, if it is screwed for a long time, it will damage the engine strip. The second is to pay attention to the car key and try not to hang it with other keys or accessories.

2. Smart key: First, the smart key uses low-intensity radio waves, so the smart key cannot be put together with electronic devices. The second is not to litter, because the internal circuit of the smart key has weak impact resistance and is easy to be damaged in the event of a violent collision.

Summary. Hello, dear, it's a great honor to solve the problem for you here, our car instrument shows this key fault light. This causes the vehicle to not start.

There are two reasons for this failure, and the first one is because of our remote control key. The battery in the remote control key is too low, causing the remote control to not send this unlock signal normally. As a result, the anti-theft module of our vehicle cannot work normally, and the indicator light is lit.

If you want to solve the problem, let's replace the battery on this remote control, and solve this problem first, dear. Here's wishing you a happy life, all the best, and all the best! <>

The car instrument shows that the key is faulty, and the light is on and can't start, what's going on.

Hello, dear, it's a great honor to solve the problem for you here, our car instrument shows this key fault light. This causes the vehicle to not start. There are two reasons for this failure, and the first one is because of our remote control key.

The battery in the remote control key is too low, causing the remote control to not send this unlock signal normally. As a result, the anti-theft module of our vehicle cannot work normally, and the indicator light is lit. If you want to solve the problem, let's replace the battery on this remote control, and solve this problem first, dear.

Here's wishing you a happy life, all the best, and all the best! <>

<>Hello, dear, there is a second reason because of the anti-theft module on our vehicle, the anti-theft module is damaged. Data loss can also cause this failure. In this case, we need to use a diagnostic computer to connect to the vehicle.

Then according to the computer reads out the anti-theft fault, the anti-theft module is repaired or the anti-theft module is upgraded. Rematch the key fob to fix this, pro. <>

<>Hello, dear. The above fault you described is a fault phenomenon caused by these two problems. You can replace the remote control battery first according to what I told you, and start with simple maintenance.

After replacing the battery, if this solves the problem, you don't need to check this anti-theft module, dear. <>

Hello, this is normal, it is the self-test mode of the instrument, if it can help you, I hope to set the best, thank you.

That's the coolant level indicator, see if there is a lack of water, if not, the sensor on the kettle is broken.

This is to let you see if the gauge indicator is working properly, and if it doesn't light up after starting, it means that the car is working properly.

When the key is opened, there are some indicators on the meter that will turn on. When the vehicle is started, there should be no indicator light on the instrument. If there is an indicator light, it means that it is not normal. This phenomenon is normal.