Jeep Cherokee Service Transmission Message: Diagnosing and Understanding Dashboard Light Codes

Do you understand what your car’s dashboard lights are trying to tell you? In this post, we will delve into a comprehensive guide to diagnosing car issues through the dashboard lights and understanding the importance of using the right scan tools.

When your car’s dashboard lights up like a Christmas tree, it’s easy to feel overwhelmed. The various lights – check engine, transmission, ABS, traction control, and more – can be perplexing for DIY enthusiasts. But fear not, understanding these lights and using the right scan tools can demystify the issue at hand.

Using the Right Tools for Diagnosing Car Issues

Most generic scan tools will only read trouble codes from the PCM (Powertrain Control Module) but might not access codes from other modules like ABS or traction control. The importance of investing in a scan tool that can read every single module cannot be stressed enough. The ability to access codes from various modules is crucial for an accurate diagnosis of the issues indicated by the dashboard lights.

Understanding Dashboard Light Codes

Dashboard lights like ABS and transmission indicate specific issues that require attention. For instance, a code related to a wheel speed sensor can point to a problem in the ABS or traction control system. It’s essential to understand the interconnectivity between these systems and how codes from one module can affect the functioning of another.

Importance of Tire Maintenance

One often overlooked aspect that can trigger multiple dashboard lights is tire maintenance. The importance of having all four tires of the same size and tread is crucial. A slight variation in tire size or tread wear can lead to erroneous wheel speed readings and trigger a cascade of dashboard lights related to ABS, traction control, and even the transmission.

Inspecting the Vehicle for Issues

When faced with dashboard lights indicating issues, it’s essential to inspect the vehicle thoroughly. In the case of a wheel speed sensor code, a visual inspection of the sensor and related components can provide valuable insights. Additionally, using data screens to check the speed of individual wheels can help pinpoint the source of the problem.


Understanding a vehicle’s dashboard lights and using the right tools for diagnosis is critical for resolving car issues effectively. Moreover, paying attention to maintenance aspects like tire size and tread can prevent unnecessary dashboard light triggers. The next time your car’s dashboard lights up, remember that it’s not just a cause for concern but an opportunity to delve into the intricacies of your vehicle’s functioning.

What are the lights appearing on the dashboard?

The dashboard is showing lights for check engine, check translight, ABS, battery, brake, traction control, and service transmission. These indicate various issues with different systems of the car.

Why is it important to have a comprehensive scan tool for troubleshooting?

It’s important to have a comprehensive scan tool because many generic scan tools only provide access to certain modules, such as the PCM (Powertrain Control Module), and may not be able to read trouble codes from other modules like ABS or traction control. A comprehensive scan tool allows for thorough troubleshooting by accessing every single module in the car.

What are the potential issues indicated by the fault codes?

The fault codes indicate problems with the right front wheel speed sensor, invalid data received from the analog brake module, and implausible vehicle speed in the TCM (Transmission Control Module). These issues could affect shifting patterns and overall vehicle control.

How can the wheel speed sensor problems be diagnosed?

To diagnose wheel speed sensor problems, one can use a comprehensive scan tool to check the speed of each wheel. If one wheel’s speed does not match the others, it indicates a problem with that wheel’s speed sensor. It’s also important to ensure that all tires are the same size and have the same amount of tread, as mismatched tires can cause similar issues.

What steps are recommended for troubleshooting the right front wheel issue?

The recommended steps for troubleshooting the right front wheel issue involve inspecting the wheel speed sensor and ensuring that the right front wheel’s speed matches the other wheels. Additionally, checking for any abnormalities in the wheel or its surroundings can help identify the root cause of the problem.

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