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The diagnostic trouble code E21703 indicates a signal issue with the Interface Integrated Chassis Management (ICM) related to the distance traveled of the vehicle. Here’s more information about this code:

Definition/Description: E21703 is a code generated when there is a problem with the signal related to the distance traveled of the vehicle as received by the ICM module. The distance traveled is typically calculated based on various vehicle sensors and used for various functions and systems.

Meaning: The code suggests that the ICM module has detected an issue with the signal for the distance traveled of the vehicle. This indicates a problem with the accuracy or consistency of the signal. It may be caused by issues with the sensors, circuits, or communication related to measuring and transmitting the distance traveled information.

Causes: Potential causes for this code include:

1. Faulty or malfunctioning sensors: The sensors responsible for measuring the distance traveled may be providing incorrect or inconsistent readings.
2. Wiring or connector problems: Issues with the wiring or connectors between the sensors and the ICM module, such as loose connections, damaged wires, or corroded terminals, can cause signal irregularities.
3. Communication issues: Problems with the communication between the sensors and the ICM module, such as data bus faults or network connectivity issues, can affect the accuracy of the distance traveled signal.
4. Faulty ICM module: In some cases, the ICM module itself may have a malfunction or internal issue that affects its ability to interpret the distance traveled signal correctly.

Symptoms: The symptoms associated with this code may include:

1. Illumination of the instrument cluster warning light.
2. Inaccurate or erratic readings displayed for the distance traveled.
3. Malfunction or incorrect operation of systems or features that rely on accurate distance traveled information, such as the trip computer or fuel consumption calculations.

Diagnosis: Diagnosing the exact cause of the signal issue with the distance traveled requires performing a series of tests and inspections, including:

1. Using a diagnostic scanner to retrieve and interpret the E21703 code.
2. Checking for any additional related codes or warnings in other control modules.
3. Inspecting the wiring and connectors between the sensors and the ICM module for damage, loose connections, or corrosion.
4. Testing the sensors separately for proper operation and accurate readings.
5. Verifying the communication between the sensors and the ICM module.
6. Testing the ICM module for proper functionality and communication.

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

1. Neglecting to check the wiring and connectors for faults before replacing sensors or modules.
2. Assuming the problem is solely related to one component without considering the entire system.
3. Not performing a comprehensive inspection of all relevant components, including the sensors, wiring, connectors, and the ICM module.

How serious is this? The severity of this code depends on the specific vehicle and the systems affected by the signal issue with the distance traveled. It may lead to inaccurate readings or malfunctions in systems that rely on accurate distance information.

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

1. Repairing or replacing damaged wiring or connectors between the sensors and the ICM module.
2. Replacing faulty sensors if diagnosed as the cause of the signal issue.
3. Resolving any communication problems between the sensors and the ICM module.
4. Replacing the ICM module if diagnosed as the cause of the problem.

It’s important to note that these are general guidelines, and the exact diagnostic and repair steps may vary depending on the vehicle’s make, model, and year.