Why are my headlamps not working in auto mode in my 2013 Scion FRS

2013 Scion FR-S limited edition. Headlights and fog not coming on in auto. But works in high beam mode.

My car has 8436 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hello. When this occurs it is typically because of a short in the body control module. This is a common failure in this module and causes the lights to not function correctly. It may also be the switch itself, though that is not as common. I will usually test the switch first and if it is fine then I check the module with a scan tool to see what it is doing. If you are going to have this repaired, consider YourMechanic, as a certified mechanic can come to you to [diagnose why the lights do not work] https://www.yourmechanic.com/services/headlight-is-not-working-inspection

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

The likely cause is a fuse, headlight relay, headlight switch, dimmer switch or a wiring fault. About the only cause that is an easy fix is a blown fuse. Consult your owner`s manual to locate the main fuse for the headlight circuit and replace that fuse with one having the same amp rating.
All the electrical systems in your car, including the headlights, are protected with fuses. These are designed to `blow` and break the circuit if too much power comes through them. This protects all the components on the circuit. If a headlight fuse blows, it could cause the headlights to stop working.
There are several possible causes of adaptive headlight failure, including burnt-out bulbs, loose electrical connections, and a damaged control module. In some cases, the problem can be resolved quickly and easily by replacing a bulb or tightening a connection.
The Intelligent Auto Headlight system can turn on the headlights automatically when it is dark and turn off the headlights when it is light.
Today`s automatic headlamps come on whenever the switch is in the “auto” position and it`s dark enough to require them. They use a photoelectric sensor that`s usually mounted on top of the dash, or on the windshield near the rearview mirror.
A: Not all vehicles have automatic headlights, especially older vintages. But I agree that, if your car is so equipped, you should use the automatic setting. Although there are not reminder lights on the dash indicating that the headlights are off, that task often falls to oncoming motorists who flash theirs.
Knowing if your car has adaptive headlights may be as simple as going for a drive in the dark. If you notice your headlights changing their angle or brightness without you doing anything, your headlights are likely adaptive.
Ultrasonic Occupancy Sensors utilize sound waves to detect human activity. When disturbances in sound wave patterns are detected, the sensor turns on the lights.
The system works via a sensor located at the top centre of the windshield. Under what conditions will IntelliBeam turn high beams off?
When you turn on your headlights, that switch activates a relay. That relay, in turn, actually provides the electrical connection between your headlight bulbs and the battery. Fuses are also involved in order to provide a sacrificial failure point to protect the rest of the wiring.
It will most likely be under the hood of your vehicle where your main fuse panel is located. However, it may be located inside the cab of the vehicle if you vehicle is equipped with an interior fuse box.
The blown fuse will be apparent because the wire element within will have melted or burned from the higher electrical current. You can also use a test light or a multimeter to identify the dead fuse without having to pull it out. Both tools are affordable and easy to use.
Sometimes, the sensors do not react quickly enough when daylight is detected, either because the windscreen is dirty – hence limiting the amount of light passing through to the sensor – or the sensors are not sensitive enough. Solving the first problem is easy – just wash your windscreen.
The problem could be a faulty dimmer switch, or a bad headlight switch or delay timer or headlamp relay or a loose or shorted wire. On some vehicles there is also an ambient light sensor that controls when the headlamps turn on and off depending upon the level of natural daylight.
Sometimes, the sensors do not react quickly enough when daylight is detected, either because the windscreen is dirty – hence limiting the amount of light passing through to the sensor – or the sensors are not sensitive enough. Solving the first problem is easy – just wash your windscreen.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Why are my headlamps not working in auto mode in my 2013 Scion FRS
ANSWER : Hello. When this occurs it is typically because of a short in the body control module. This is a common failure in this module and causes the lights to not function correctly. It may also be the switch itself, though that is not as common. I will usually test the switch first and if it is fine then I check the module with a scan tool to see what it is doing. If you are going to have this repaired, consider YourMechanic, as a certified mechanic can come to you to [diagnose why the lights do not work] https://www.yourmechanic.com/services/headlight-is-not-working-inspection

Windshield wipers stopped working. They’ll suddenly stop working then suddenly start working again. Has been happening for a week.
ANSWER : The problem you are describing likely stems from an intermittent electrical fault in the wiper circuit. The windshield wiper system uses a small electric motor to move the wiper arms that you see on the windshield. That electric motor is controlled through a switch, relay, fuse, and wiring. One, or more, of those electrical components has failed although it is also possible that the mechanical arms are binding (seized, if the lubricant has dried out) thus causing the electric circuit to the motor to overload. Regardless of the underlying fault, if you request a non functioning wiper diagnostic/repair, the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

My dash board don’t work my front light work when I change my light into high beam and my back window won’t go down
ANSWER : As unfortunate as it is, your vehicle would be considered flood damaged. Diagnosing electrical problems in a flood damaged vehicle is nearly impossible. This would take many hours or even days to determine which wiring harnesses and circuits have been affected. Then nearly all of the wiring under the dash would likely require replacement as well as many sensors and switches. On a BMW vehicle, the amount of wires and switches are likely more than that of a lower end vehicle. Due to the inefficiency in cost, you would likely be able to purchase another BMW like yours for less than what it would cost to fix your car. Many insurance companies would consider this type of damage to total out the vehicle unfortuantely.

My AC does not always work. If I fiddle with the blower knob I can ususally get it to work on the lowest setting.
ANSWER : Hi There,
It sounds like you may have a faulty blower motor resistor. The highest speed setting may still work because in most cars in the highest fan speed settings the current bypasses the blower motor resistor. In some cars, if the resistor is failed, the fan may stop working completely. Another reason a blower motor resistor may fail is when the blower motor has a mechanical problem or when a foreign object jams the blower motor fan blade and prevents it from spinning freely. This leads to increased current through the resistor and causes it to overheat and fail. I would suggest having an expert from YourMechanic come to your location to diagnose your system to determine what may be causing the fan not to work properly.

I shifted the lever to drive mode, but it goes to reverse mode. What is the problem?
ANSWER : You are very nearly right. There is a bowden type cable that connects the the shifter to the transmission. It has adjustable ends and one or more of those adjustments has probably worked loose. That or you might need a new shift cable or new bushings at the connections. Either way, you can have the problem conveniently solved by contacting Your Mechanic. They will send a technician to your home or office to check out your shifter and transmission and tell you exactly what you need to repair it. Meanwhile, be very careful with this car, it might not go into park when you expect it to so be sure to set the brake and park it very carefully.

All dashboard lights and tail lights do not work after driving through a lot of snow. Headlights work. And brake lights work.
ANSWER : Hello. We’ll be happy to help you. There are a few things that I recommend checking to discover why your lighting system is malfunctioning. The headlight dimmer switch should be checked. Along with the wiring harness above the right front tire behind the fender well cover. Also
the main fuse under the hood should be inspected because other people with your particular vehicle have had similar lighting issues if that fuse goes bad. It will be a great idea to check the rest of the fuses in that area too while checking the main fuse. Once the fuses are checked inside of the main fuse box then I would check the fuses inside of their interior fuse box. The interior fuse box should be located on the driver side of the dashboard near where your legs would be. If you need more assistance with repairing your vehicle please keep in mind that our organization provides Mobile Mechanics who can help you diagnose and repair your vehicle, all at competitive rates.

Dash, Tail/brake, dome, trunk, glovebox, and door lights won’t work, dash doing weird things.
ANSWER : Hi there. Sure would appear a lot is going on electrically all at once. This could be, a problem in the PDC (power distribution center). The PDC is typically located under the hood and contains numerous fuses and relays. I don’t believe any one fuse will resolve all of the electrical issues. There is a possibility, it is not a power supply issue. It may be, the result of a poor electrical ground common to the inoperative components. Proper circuit testing should be performed. This would confirm the cause of multiple electrical failures. I recommend having your vehicle’s electrical problems be diagnosed and repaired by a certified technician, such as one from YourMechanic.

How long can a car run like when driving back and forth from work when battery saver mode is on? I plan to have it checked after w
ANSWER : The primary function of the battery is to start the vehicle. Once it is running, the alternator provides the electrical needs of the engine, lights,radio,heater,etc. If the alternator is faulty and not producing power, these systems will draw power from the battery. Since the battery can’t recharge itself – the alternator keeps it charged – the battery will eventually die and the vehicle will shut down. It is difficult to predict how long the vehicle will run on battery power alone. Everything you use – lights, signals, heater, wipers,etc – will all draw more power from the battery and drain it quickly. Cold temperatures will also shorten the amount of time the battery will last under those conditions. The vehicle may run for mere minutes, or maybe an hour or more.