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The diagnostic trouble code E11490 indicates that there is no message being received from the DSC (Dynamic Stability Control) module to the KOMBI (Instrument Cluster) module for the Check Control display bypass. Here’s more information about this code:

Definition/Description: E11490 is a code generated when the KOMBI module does not receive any message from the DSC module for the Check Control display bypass. The Check Control display is responsible for showing warnings or notifications to the driver regarding various vehicle systems.

Meaning: The code suggests that there is a communication issue between the DSC module and the KOMBI module specifically related to the bypassing of Check Control display messages. The Check Control display messages provide important information to the driver about the vehicle’s systems and potential issues.

Causes: Some potential causes for this code include:

1. Faulty or malfunctioning communication between the DSC module and the KOMBI module.
2. Wiring or connector problems, such as loose connections or damaged wires, affecting the signal transmission.
3. Issues with the DSC module or KOMBI module itself, preventing the proper transmission of messages.
4. Software or programming issues related to the communication protocol between the modules.

Symptoms: The symptoms associated with this code may include:

1. No Check Control display messages or warnings appearing on the instrument cluster.
2. Limited functionality or absence of important notifications about vehicle systems or issues.
3. Difficulty in diagnosing or addressing potential problems due to the lack of Check Control display messages.

Diagnosis: Diagnosing the exact cause of the missing Check Control display bypass message requires performing a series of tests and inspections, including:

1. Using a diagnostic scanner to retrieve and interpret the E11490 code.
2. Checking for any additional related codes or warnings related to the DSC or KOMBI modules.
3. Inspecting the wiring and connectors between the DSC and KOMBI modules for damage or loose connections.
4. Verifying the communication between the modules by performing a module scan or communication test.
5. Checking for any software or programming updates available for the modules.

Common Mistakes: Common mistakes when dealing with this code include:

1. Overlooking wiring and connector issues that may cause communication problems.
2. Assuming the problem is solely related to one module without considering the communication between modules.
3. Neglecting to check for software updates or programming issues that may affect the communication.

How serious is this? The severity of this code depends on the specific vehicle and the importance of the Check Control display messages for proper vehicle operation and maintenance. The absence of Check Control display bypass messages may limit the driver’s awareness of potential issues or warnings, making it important to address the communication problem.

What repairs can fix the code? Possible repairs for this code include:

1. Repairing or replacing damaged wiring or connectors between the DSC and KOMBI modules.
2. Addressing any communication issues or faults within the DSC or KOMBI modules.
3. Updating or reprogramming the software of the modules if necessary.
4. Resetting or reinitializing the modules to establish proper communication.

Related Codes: There may be related codes stored in the vehicle’s system, depending on the specific make and model. It’s important to retrieve and address any additional codes present for a comprehensive diagnosis.

It’s worth noting that specific diagnostic and repair steps may vary depending on the vehicle make, model, and year. It’s recommended to consult the vehicle’s service manual or seek assistance from a qualified mechanic or dealership for an accurate diagnosis and appropriate repairs.