How to Diagnose and Solve B1836 Door Unlock Disarm Output Circuit Short To Battery Issues

Introduction

If you’re experiencing issues with your car’s door unlock and disarm output circuit, specifically the B1836 code, you’re not alone. This problem can be frustrating and even dangerous if not addressed promptly. In this article, we’ll discuss how to diagnose and solve B1836 door unlock disarm output circuit short to battery issues.

What is the B1836 Code?

The B1836 code is a diagnostic trouble code (DTC) that indicates a short circuit in the door unlock and disarm output circuit. This circuit is responsible for unlocking and disarming the car’s security system when the key is inserted into the ignition or the remote is used to unlock the doors.

Diagnosing the Problem

To diagnose the problem, you’ll need a diagnostic scanner that can read DTCs. Connect the scanner to your car’s OBD-II port and retrieve the code. Once you have the code, you can begin diagnosing the problem.

Step 1: Check the Fuses

The first step is to check the fuses related to the door unlock and disarm output circuit. Look for any blown fuses and replace them if necessary.

Step 2: Check the Wiring

If the fuses are okay, the next step is to check the wiring. Look for any damaged or frayed wires in the door unlock and disarm output circuit. If you find any damaged wires, repair or replace them as necessary.

Step 3: Check the Door Lock Actuator

If the wiring is okay, the next step is to check the door lock actuator. The actuator is responsible for locking and unlocking the doors. If the actuator is faulty, it can cause the B1836 code to appear. Check the actuator for any signs of damage or wear and replace it if necessary.

Step 4: Check the BCM

If the actuator is okay, the next step is to check the body control module (BCM). The BCM is responsible for controlling the door unlock and disarm output circuit. If the BCM is faulty, it can cause the B1836 code to appear. Check the BCM for any signs of damage or wear and replace it if necessary.

Solving the Problem

Once you’ve diagnosed the problem, it’s time to solve it. Depending on the cause of the problem, you may need to replace a component or repair a damaged wire. Follow the steps below to solve the problem.

Step 1: Replace Blown Fuses

If you found any blown fuses during the diagnostic process, replace them with new ones.

Step 2: Repair or Replace Damaged Wires

If you found any damaged wires during the diagnostic process, repair or replace them as necessary.

Step 3: Replace the Door Lock Actuator

If the door lock actuator is faulty, replace it with a new one.

Step 4: Replace the BCM

If the BCM is faulty, replace it with a new one.

Conclusion

The B1836 code can be a frustrating problem to deal with, but with the right diagnostic tools and a little know-how, it can be solved. By following the steps outlined in this article, you can diagnose and solve B1836 door unlock disarm output circuit short to battery issues.

FAQs

1. Can I drive my car with the B1836 code?

It’s not recommended to drive your car with the B1836 code. This code indicates a problem with the door unlock and disarm output circuit, which can affect the security of your car.

2. How much does it cost to replace the BCM?

The cost of replacing the BCM can vary depending on the make and model of your car. On average, you can expect to pay between $300 and $500 for parts and labor.

3. Can I diagnose the B1836 code without a diagnostic scanner?

No, you’ll need a diagnostic scanner that can read DTCs to diagnose the B1836 code. Without a scanner, you won’t be able to retrieve the code and diagnose the problem.