How to Fix B1370 Ignition Tach Circuit Short to Ground

Introduction

If you’re experiencing issues with your car’s ignition system, specifically the B1370 code, you may be wondering what steps you can take to fix the problem. The B1370 code indicates that there is a short circuit in the ignition tach circuit, which can cause a variety of issues with your car’s performance. In this article, we’ll provide you with step-by-step instructions on how to fix the B1370 code and get your car running smoothly again.

What is the B1370 Code?

The B1370 code is a diagnostic trouble code that indicates a short circuit in the ignition tach circuit. This circuit is responsible for measuring the engine’s RPM and sending that information to the car’s computer. When there is a short circuit in this circuit, it can cause a variety of issues with your car’s performance, including stalling, misfiring, and difficulty starting.

Step-by-Step Guide to Fixing the B1370 Code

Step 1: Check the Wiring

The first step in fixing the B1370 code is to check the wiring in the ignition tach circuit. Look for any signs of damage or wear, such as frayed wires or loose connections. If you find any issues with the wiring, repair or replace the damaged components.

Step 2: Check the Ignition Coil

If the wiring appears to be in good condition, the next step is to check the ignition coil. The ignition coil is responsible for generating the spark that ignites the fuel in the engine. If the ignition coil is faulty, it can cause a short circuit in the ignition tach circuit. Use a multimeter to test the resistance of the ignition coil. If the resistance is outside of the manufacturer’s specifications, replace the ignition coil.

Step 3: Check the Ignition Control Module

If the ignition coil appears to be in good condition, the next step is to check the ignition control module. The ignition control module is responsible for controlling the timing of the spark that ignites the fuel in the engine. If the ignition control module is faulty, it can cause a short circuit in the ignition tach circuit. Use a multimeter to test the resistance of the ignition control module. If the resistance is outside of the manufacturer’s specifications, replace the ignition control module.

Step 4: Check the Crankshaft Position Sensor

If the ignition control module appears to be in good condition, the next step is to check the crankshaft position sensor. The crankshaft position sensor is responsible for measuring the position of the crankshaft and sending that information to the car’s computer. If the crankshaft position sensor is faulty, it can cause a short circuit in the ignition tach circuit. Use a multimeter to test the resistance of the crankshaft position sensor. If the resistance is outside of the manufacturer’s specifications, replace the crankshaft position sensor.

Conclusion

Fixing the B1370 code can be a complex process, but by following these step-by-step instructions, you can diagnose and repair the issue with your car’s ignition tach circuit. Remember to always check the wiring first, and then move on to the ignition coil, ignition control module, and crankshaft position sensor if necessary. By taking the time to properly diagnose and repair the issue, you can ensure that your car is running smoothly and safely.

FAQs

1. Can I drive my car with the B1370 code?

It is not recommended to drive your car with the B1370 code. This code indicates a short circuit in the ignition tach circuit, which can cause a variety of issues with your car’s performance, including stalling, misfiring, and difficulty starting. It’s best to diagnose and repair the issue as soon as possible to avoid further damage to your car.

2. How much does it cost to fix the B1370 code?

The cost to fix the B1370 code can vary depending on the cause of the issue. If the issue is with the wiring, the cost may be relatively low. However, if the issue is with the ignition coil, ignition control module, or crankshaft position sensor, the cost may be higher. It’s best to get a quote from a trusted mechanic to determine the exact cost of the repair.

3. How can I prevent the B1370 code from occurring again?

To prevent the B1370 code from occurring again, it’s important to properly maintain your car’s ignition system. This includes regularly checking the wiring, ignition coil, ignition control module, and crankshaft position sensor for signs of wear or damage. Additionally, following the manufacturer’s recommended maintenance schedule can help prevent issues with your car’s ignition system.