How to Diagnose and Solve B1790 Autolamp Sensor Input Circuit Failure Issues

Introduction

As a car owner, it’s essential to know how to diagnose and solve common car problems. One of the most common issues that car owners face is the B1790 Autolamp Sensor Input Circuit Failure. This problem can be frustrating, especially if you don’t know how to diagnose and solve it. In this article, we will provide you with a step-by-step guide on how to diagnose and solve B1790 Autolamp Sensor Input Circuit Failure issues.

What is B1790 Autolamp Sensor Input Circuit Failure?

The B1790 Autolamp Sensor Input Circuit Failure is a diagnostic trouble code (DTC) that indicates a problem with the autolamp sensor input circuit. The autolamp sensor is responsible for turning on the headlights when it gets dark outside. If the autolamp sensor input circuit fails, the headlights may not turn on, or they may turn on and off randomly.

Diagnosing B1790 Autolamp Sensor Input Circuit Failure

To diagnose B1790 Autolamp Sensor Input Circuit Failure, you will need an OBD-II scanner. Follow these steps:

Step 1: Connect the OBD-II Scanner

Connect the OBD-II scanner to the diagnostic port under the dashboard. Turn on the ignition and wait for the scanner to connect.

Step 2: Read the DTCs

Read the DTCs using the OBD-II scanner. Look for the B1790 code. If the scanner displays the B1790 code, it means that there is a problem with the autolamp sensor input circuit.

Step 3: Check the Autolamp Sensor Input Circuit

Check the autolamp sensor input circuit for any damage or loose connections. If you find any damage or loose connections, repair or replace them.

Step 4: Check the Autolamp Sensor

Check the autolamp sensor for any damage or malfunction. If you find any damage or malfunction, replace the autolamp sensor.

Solving B1790 Autolamp Sensor Input Circuit Failure

Once you have diagnosed the B1790 Autolamp Sensor Input Circuit Failure, you can solve the problem by following these steps:

Step 1: Repair or Replace the Autolamp Sensor Input Circuit

If you found any damage or loose connections in the autolamp sensor input circuit, repair or replace them.

Step 2: Replace the Autolamp Sensor

If you found any damage or malfunction in the autolamp sensor, replace it.

Step 3: Clear the DTCs

Clear the DTCs using the OBD-II scanner. Turn off the ignition and wait for a few seconds. Turn on the ignition again and check if the B1790 code has disappeared.

Useful Tips

Here are some useful tips to prevent B1790 Autolamp Sensor Input Circuit Failure:

– Regularly check the autolamp sensor input circuit for any damage or loose connections.
– Replace the autolamp sensor if it shows any signs of damage or malfunction.
– Use high-quality autolamp sensors and input circuits to prevent future problems.

Conclusion

B1790 Autolamp Sensor Input Circuit Failure can be a frustrating problem for car owners. However, with the right tools and knowledge, you can diagnose and solve the problem quickly and easily. Follow the steps outlined in this article to diagnose and solve B1790 Autolamp Sensor Input Circuit Failure issues.

FAQs

1. Can I drive my car with B1790 Autolamp Sensor Input Circuit Failure?

It’s not recommended to drive your car with B1790 Autolamp Sensor Input Circuit Failure. The autolamp sensor is responsible for turning on the headlights when it gets dark outside. If the autolamp sensor input circuit fails, the headlights may not turn on, or they may turn on and off randomly, which can be dangerous while driving.

2. How much does it cost to replace the autolamp sensor?

The cost of replacing the autolamp sensor varies depending on the make and model of your car. On average, it can cost anywhere from $100 to $300.

3. Can I replace the autolamp sensor myself?

Replacing the autolamp sensor requires some mechanical knowledge and experience. If you’re not confident in your abilities, it’s best to take your car to a professional mechanic. However, if you have experience working on cars, you can replace the autolamp sensor yourself by following the manufacturer’s instructions.