Can the C4/C6 Interfaces Be Used to Diagnose Aftermarket ECU Tunes?

Navigating the complexities of aftermarket ECU tunes can be challenging, but understanding your diagnostic options is essential. Can the C4/C6 interfaces be used to diagnose issues with aftermarket ECU tunes? Yes, they can read data and codes, but they won’t interpret tune-specific issues; DTS-MONACO.EDU.VN is here to guide you through the intricacies of ECU tuning and diagnostics, offering advanced solutions and training to help you master these essential skills. Understanding the limitations of C4/C6 interfaces and exploring alternative diagnostic methods can empower you to tackle even the most complex tuning challenges. Explore car coding, software solutions, and diagnostic tools to enhance your automotive expertise.

1. Understanding the Role of C4/C6 Interfaces in Vehicle Diagnostics

C4 and C6 interfaces are integral tools in the realm of automotive diagnostics, serving as the bridge between diagnostic software and the vehicle’s electronic control units (ECUs). These interfaces enable technicians to read diagnostic trouble codes (DTCs), access live data streams, and perform various tests to assess the health and performance of vehicle systems. However, their effectiveness in diagnosing issues with aftermarket ECU tunes is limited. Let’s delve deeper into the capabilities and limitations of C4/C6 interfaces.

1.1 What are C4/C6 Interfaces?

C4 and C6 interfaces are specialized diagnostic tools used primarily with Mercedes-Benz vehicles. They facilitate communication between diagnostic software (like XENTRY or DAS) and the vehicle’s ECUs. These interfaces are designed to read and interpret data based on the manufacturer’s specifications, providing valuable insights into the vehicle’s operational status.

1.2 Standard Diagnostic Capabilities

C4/C6 interfaces excel at standard diagnostic tasks, including:

• Reading Diagnostic Trouble Codes (DTCs): Identifying and interpreting standard fault codes stored in the ECU.
• Accessing Live Data Streams: Monitoring real-time data from sensors and actuators, such as engine speed, temperature, and fuel pressure.
• Performing Actuator Tests: Activating and testing various components like fuel pumps, injectors, and cooling fans.
• ECU Flashing and Programming: Updating or reprogramming ECU software with factory-approved firmware.

1.3 Limitations with Aftermarket ECU Tunes

When dealing with aftermarket ECU tunes, C4/C6 interfaces face several limitations:

• Lack of Tune-Specific Interpretation: Aftermarket tunes often modify parameters and algorithms beyond the scope of the standard diagnostic software. C4/C6 interfaces may not recognize or correctly interpret these changes.
• Inability to Identify Modified Parameters: Standard diagnostic tools are designed to read data within the parameters set by the original manufacturer. They cannot identify or display data from custom-modified tables or maps.
• Risk of Misinterpretation: Attempting to diagnose an aftermarket tune with a standard interface can lead to misinterpretations and inaccurate conclusions, potentially causing further issues.

The Mercedes-Benz Diagnostic Tool C4/C6 Interface is a vital tool for automotive technicians, facilitating communication between diagnostic software and the vehicle’s ECU for comprehensive diagnostics and maintenance.

2. The Challenges of Diagnosing Aftermarket ECU Tunes

Diagnosing issues with aftermarket ECU tunes presents unique challenges compared to troubleshooting factory settings. These challenges stem from the custom nature of the tunes, which often alter fundamental parameters and algorithms within the ECU.

2.1 Complexity of Aftermarket Tunes

Aftermarket ECU tunes are designed to optimize vehicle performance beyond the manufacturer’s original specifications. This optimization involves modifying various parameters, such as:

• Fuel Maps: Adjusting fuel delivery to optimize combustion.
• Ignition Timing: Altering spark timing for improved power and efficiency.
• Boost Control: Modifying turbocharger boost levels for increased performance.
• Rev Limiters: Raising or removing RPM limits to allow for higher engine speeds.

These modifications can significantly impact engine behavior, making it difficult to diagnose issues using standard diagnostic methods.

2.2 Non-Standard Data and Codes

Aftermarket tunes often introduce non-standard data and codes that standard diagnostic tools cannot interpret. This can result in:

• Missing DTCs: The ECU may not generate standard DTCs for issues specific to the aftermarket tune.
• Incorrect Data Readings: Standard sensors may provide inaccurate or misleading data due to the modified parameters.
• Limited Diagnostic Support: The diagnostic software may not support the custom parameters and algorithms used in the aftermarket tune.

2.3 Risk of Overwriting the Tune

Attempting to flash or reprogram an ECU with an aftermarket tune using standard diagnostic tools can lead to unintended consequences. This includes:

• Overwriting the Tune: The standard flashing process can replace the aftermarket tune with the factory settings, effectively removing the performance enhancements.
• ECU Damage: Incompatible software or incorrect flashing procedures can damage the ECU, rendering it unusable.
• Warranty Issues: Modifying the ECU can void the vehicle’s warranty, leaving the owner responsible for any repairs.

2.4 The Importance of Specialized Tools

Given these challenges, diagnosing aftermarket ECU tunes requires specialized tools and expertise. Standard C4/C6 interfaces may provide basic data, but they lack the ability to interpret tune-specific issues accurately.

3. Alternative Diagnostic Methods for Aftermarket Tunes

To effectively diagnose issues with aftermarket ECU tunes, it’s crucial to employ alternative diagnostic methods that are tailored to the custom nature of these modifications. These methods involve using specialized tools, software, and techniques to analyze the ECU’s behavior and identify potential problems.

3.1 Data Logging and Analysis

Data logging is a critical technique for understanding how the engine is performing under various conditions. This involves recording real-time data from the ECU and analyzing it to identify anomalies or deviations from the expected behavior.

• Using Specialized Data Loggers: Standalone data loggers or software integrated with the aftermarket tuning solution can record a wide range of parameters, including fuel trims, ignition timing, boost pressure, and sensor readings.

• Analyzing Data Logs: Technicians can analyze the data logs to identify issues such as:

  • Fueling Problems: Rich or lean conditions that can cause performance issues or engine damage.
  • Ignition Issues: Timing retard or knock that can lead to power loss or engine damage.
  • Boost Issues: Overboost or underboost conditions that can affect performance and reliability.

• Software such as: VCDS, FORScan, OBDLink

3.2 Wideband O2 Sensors

Wideband O2 sensors provide more accurate and detailed information about the air-fuel ratio (AFR) compared to narrowband sensors. This is crucial for diagnosing fueling issues in aftermarket tunes.

• Installation and Use: Wideband O2 sensors can be installed in the exhaust system to monitor AFR in real-time.

• AFR Analysis: Analyzing the AFR data can help identify:

  • Lean Conditions: Insufficient fuel delivery, which can cause engine damage.
  • Rich Conditions: Excessive fuel delivery, which can lead to poor performance and increased emissions.
  • AFR Fluctuations: Inconsistent fuel delivery, which can indicate problems with the fuel system or ECU.

3.3 ECU Tuning Software

ECU tuning software provides access to the ECU’s internal parameters and allows technicians to monitor and modify the tune. This software is essential for diagnosing and resolving issues with aftermarket tunes.

• Accessing ECU Parameters: Tuning software allows technicians to view and adjust parameters such as fuel maps, ignition timing, and boost control settings.

• Real-Time Monitoring: Many tuning software packages offer real-time monitoring capabilities, allowing technicians to observe how the engine is responding to changes in the tune.

• Diagnostic Features: Some tuning software includes built-in diagnostic features, such as:

  • Error Code Reading: Reading and clearing error codes specific to the aftermarket tune.
  • Data Logging: Recording data logs for analysis.
  • Actuator Testing: Performing tests on various engine components.

3.4 Dyno Testing

Dyno testing involves running the vehicle on a dynamometer to measure its power and torque output. This can help identify performance issues and fine-tune the aftermarket tune for optimal results.

• Measuring Performance: Dyno testing provides objective data on the vehicle’s power and torque output, allowing technicians to assess the effectiveness of the aftermarket tune.

• Identifying Issues: Dyno testing can reveal issues such as:

  • Power Loss: Reduced power output compared to the expected performance.
  • Torque Dips: Irregularities in the torque curve that can indicate engine problems.
  • Inconsistent Performance: Variations in power and torque output between runs, which can indicate issues with the tune or engine components.

• Fine-Tuning: Dyno testing allows technicians to make precise adjustments to the aftermarket tune to optimize performance and reliability.

Vehicle Dyno Testing provides precise measurements of power and torque, crucial for diagnosing performance issues and optimizing aftermarket ECU tunes.

4. Understanding the Limitations of Generic OBD-II Scanners

Generic OBD-II (On-Board Diagnostics II) scanners are widely used for basic vehicle diagnostics, but they have significant limitations when it comes to diagnosing issues with aftermarket ECU tunes. While they can read standard diagnostic trouble codes (DTCs), they often fall short in providing the detailed information needed to troubleshoot custom-tuned vehicles.

4.1 Standardized Data vs. Custom Parameters

OBD-II scanners are designed to read standardized data parameters that are common across all vehicles. However, aftermarket ECU tunes often involve modifications to parameters that are not part of the standard OBD-II protocol. This means that a generic scanner may not be able to access or interpret the custom parameters used in the tune.

4.2 Limited Access to ECU Functions

Generic OBD-II scanners typically have limited access to the ECU’s functions. They can read basic sensor data and DTCs, but they cannot access advanced functions such as:

• Fuel Map Adjustments: Viewing or modifying fuel maps.
• Ignition Timing Adjustments: Viewing or modifying ignition timing settings.
• Boost Control Settings: Accessing or modifying boost control parameters.
• Custom Error Codes: Reading error codes specific to the aftermarket tune.

4.3 Potential for Misinterpretation

Using a generic OBD-II scanner to diagnose an aftermarket tune can lead to misinterpretations and inaccurate conclusions. The scanner may display error codes or data that are not relevant to the actual issue, or it may fail to detect problems specific to the tune.

4.4 Lack of Tune-Specific Support

Generic OBD-II scanners do not have tune-specific support. They are designed to work with factory settings and may not be compatible with the custom parameters and algorithms used in aftermarket tunes. This can make it difficult to accurately diagnose and resolve issues with the tune.

4.5 Recommendations

Given these limitations, it’s essential to use specialized tools and techniques when diagnosing aftermarket ECU tunes. This includes:

• ECU Tuning Software: Using software that is specifically designed for the aftermarket tune.
• Data Logging: Recording and analyzing data logs to identify anomalies.
• Wideband O2 Sensors: Monitoring air-fuel ratio to diagnose fueling issues.
• Dyno Testing: Measuring performance to assess the effectiveness of the tune.

5. Utilizing DTS-Monaco for Advanced Diagnostics

DTS-Monaco is a powerful diagnostic and engineering software commonly used for Mercedes-Benz vehicles. It offers advanced capabilities that can be highly beneficial when diagnosing issues with aftermarket ECU tunes, provided it is used with the appropriate knowledge and understanding of the tuning parameters.

5.1 Enhanced Diagnostic Capabilities

DTS-Monaco provides access to a wide range of diagnostic functions beyond what is available with standard OBD-II scanners or even C4/C6 interfaces. This includes:

• Deep ECU Access: Accessing detailed ECU parameters and settings.
• Custom Data Monitoring: Monitoring custom data parameters specific to the aftermarket tune.
• Advanced Error Code Reading: Reading and interpreting error codes that may not be visible with generic scanners.
• Actuator Testing: Performing advanced tests on various engine components.

5.2 Data Logging with DTS-Monaco

DTS-Monaco allows for comprehensive data logging, capturing a wide range of parameters in real-time. This data can be analyzed to identify issues such as:

• Fueling Problems: Monitoring fuel trims and air-fuel ratio to detect lean or rich conditions.
• Ignition Issues: Monitoring ignition timing and knock to identify timing-related problems.
• Boost Issues: Monitoring boost pressure to detect overboost or underboost conditions.
• Sensor Issues: Monitoring sensor readings to identify faulty or inaccurate sensors.

5.3 ECU Flashing and Programming

DTS-Monaco can be used to flash and program ECUs, allowing technicians to update or modify the ECU software. However, this capability should be used with extreme caution when dealing with aftermarket tunes, as it can potentially overwrite or damage the tune.

5.4 Risks and Precautions

While DTS-Monaco offers advanced diagnostic capabilities, it’s essential to be aware of the risks and take appropriate precautions:

• Potential for Damage: Incorrect use of DTS-Monaco can damage the ECU or other vehicle components.
• Tune Overwriting: Flashing the ECU can overwrite the aftermarket tune, requiring it to be reinstalled.
• Expert Knowledge Required: Using DTS-Monaco effectively requires expert knowledge of vehicle systems and ECU tuning.

5.5 Training and Expertise

To effectively use DTS-Monaco for diagnosing aftermarket ECU tunes, it’s crucial to have proper training and expertise. DTS-MONACO.EDU.VN offers specialized training courses that cover:

• DTS-Monaco Fundamentals: Learning the basics of DTS-Monaco and its functions.
• Advanced Diagnostics: Using DTS-Monaco for advanced diagnostics and troubleshooting.
• ECU Tuning: Understanding ECU tuning principles and techniques.
• Safety Procedures: Following safety procedures to prevent damage to the vehicle or ECU.

The DTS Monaco Software Interface is a powerful tool for advanced diagnostics and ECU programming, requiring expert knowledge for safe and effective use.

6. Case Studies: Diagnosing Aftermarket Tune Issues

Examining real-world case studies can provide valuable insights into how to diagnose issues with aftermarket ECU tunes effectively. Here are a couple of examples:

6.1 Case Study 1: Lean Condition After Tune Installation

• Problem: A customer reported a loss of power and poor fuel economy after installing an aftermarket ECU tune on their turbocharged vehicle.

• Initial Diagnostic Steps:

  • A generic OBD-II scanner showed no DTCs.
  • Live data from the scanner indicated normal sensor readings.

• Advanced Diagnostic Steps:

  • A wideband O2 sensor was installed to monitor air-fuel ratio (AFR).
  • Data logging was performed using ECU tuning software.

• Findings:

  • The wideband O2 sensor revealed a lean condition (AFR above 14.7:1) under boost.
  • Data logging confirmed that the fuel trims were excessively positive, indicating that the ECU was trying to compensate for the lean condition.

• Solution:

  • The aftermarket tune was adjusted to increase fuel delivery under boost.
  • The AFR was monitored to ensure it remained within the safe range (12.5:1 to 13.5:1).
  • The vehicle’s performance and fuel economy were restored.

• Lessons Learned:

  • Generic OBD-II scanners may not detect lean conditions caused by aftermarket tunes.
  • Wideband O2 sensors and data logging are essential for diagnosing fueling issues.
  • Adjusting the tune to optimize fuel delivery can resolve lean conditions and improve performance.

6.2 Case Study 2: Misfire After Tune Modification

• Problem: A customer experienced intermittent misfires after modifying an aftermarket ECU tune on their naturally aspirated engine.

• Initial Diagnostic Steps:

  • A generic OBD-II scanner showed misfire DTCs.
  • Spark plugs, ignition coils, and injectors were tested and found to be in good condition.

• Advanced Diagnostic Steps:

  • Data logging was performed using DTS-Monaco.
  • Ignition timing and knock sensor data were monitored.

• Findings:

  • Data logging revealed excessive timing retard and knock during the misfire events.
  • The aftermarket tune had advanced the ignition timing too aggressively, causing detonation and misfires.

• Solution:

  • The aftermarket tune was adjusted to reduce the ignition timing advance.
  • The knock sensor sensitivity was increased to detect potential detonation events.
  • The misfires were eliminated, and the engine ran smoothly.

• Lessons Learned:

  • Aftermarket tunes can cause misfires by advancing ignition timing too aggressively.
  • Monitoring ignition timing and knock sensor data is crucial for diagnosing misfires.
  • Adjusting the tune to optimize ignition timing can eliminate misfires and improve engine reliability.

These case studies highlight the importance of using specialized tools and techniques when diagnosing issues with aftermarket ECU tunes. Generic OBD-II scanners may provide basic information, but they often lack the detailed data needed to accurately diagnose and resolve complex tuning-related problems.

7. Best Practices for Working with Aftermarket ECU Tunes

When working with aftermarket ECU tunes, it’s essential to follow best practices to ensure accurate diagnostics, safe modifications, and optimal performance. Here are some key recommendations:

7.1 Verify the Tune’s Source and Quality

Before working on a vehicle with an aftermarket ECU tune, verify the tune’s source and quality. Ensure that the tune was created by a reputable tuner with experience in the specific vehicle and engine. Low-quality or poorly designed tunes can cause a variety of problems, including:

• Performance Issues: Reduced power, poor fuel economy, and drivability problems.
• Engine Damage: Overheating, detonation, and premature wear.
• Diagnostic Challenges: Difficulty in diagnosing and resolving issues due to non-standard parameters and codes.

7.2 Document All Modifications

Keep detailed records of all modifications made to the ECU tune. This includes:

• Tune Version: The specific version of the aftermarket tune.
• Parameter Changes: All changes made to fuel maps, ignition timing, boost control, and other settings.
• Date of Modifications: The date when each modification was made.
• Tuner Information: The name and contact information of the tuner who created or modified the tune.

This documentation will be invaluable for future diagnostics and troubleshooting.

7.3 Use Appropriate Diagnostic Tools

Use diagnostic tools that are specifically designed for working with aftermarket ECU tunes. This includes:

• ECU Tuning Software: Software that allows you to access and modify the tune’s parameters.
• Wideband O2 Sensors: Sensors that provide accurate air-fuel ratio (AFR) data.
• Data Loggers: Devices that record real-time data from the ECU.
• DTS-Monaco: Advanced diagnostic and engineering software for Mercedes-Benz vehicles.

7.4 Monitor Engine Performance

Regularly monitor engine performance to identify potential issues early on. This includes:

• Checking for DTCs: Scanning for diagnostic trouble codes using a diagnostic scanner.
• Monitoring Sensor Readings: Observing sensor data such as coolant temperature, oil pressure, and boost pressure.
• Analyzing Fuel Trims: Monitoring short-term and long-term fuel trims to detect fueling issues.
• Listening for Unusual Noises: Paying attention to any unusual noises or vibrations that may indicate engine problems.

7.5 Proceed with Caution

When modifying or diagnosing aftermarket ECU tunes, proceed with caution. Incorrect modifications or diagnostic procedures can potentially damage the ECU or other vehicle components. If you’re unsure about a particular procedure, seek guidance from an experienced tuner or technician.

8. The Future of ECU Diagnostics and Tuning

The field of ECU diagnostics and tuning is constantly evolving, with new technologies and techniques emerging to improve accuracy, efficiency, and safety. Here are some of the key trends shaping the future of this industry:

8.1 Advanced Sensor Technologies

New sensor technologies are providing more detailed and accurate data about engine performance. This includes:

• High-Resolution Knock Sensors: Sensors that can detect subtle knock events more accurately.
• Crankshaft and Camshaft Position Sensors: Sensors that provide precise data about engine timing.
• Cylinder Pressure Sensors: Sensors that measure the pressure inside each cylinder, providing valuable insights into combustion efficiency.

8.2 Artificial Intelligence (AI) and Machine Learning

AI and machine learning are being used to analyze large amounts of data from ECUs and sensors, identifying patterns and anomalies that would be difficult for humans to detect. This can help technicians diagnose issues more quickly and accurately.

8.3 Cloud-Based Diagnostic Platforms

Cloud-based diagnostic platforms allow technicians to access diagnostic data and tuning parameters from anywhere in the world. This can facilitate remote diagnostics and collaboration between tuners and technicians.

8.4 Enhanced Cybersecurity

As vehicles become more connected, cybersecurity is becoming increasingly important. New technologies are being developed to protect ECUs from unauthorized access and modification.

8.5 Integration with ADAS Systems

Advanced Driver-Assistance Systems (ADAS) are becoming more prevalent in modern vehicles. Future ECU diagnostic and tuning tools will need to integrate with ADAS systems to ensure that modifications to the ECU do not negatively impact the performance or safety of these systems.

8.6 The Role of DTS-MONACO.EDU.VN

DTS-MONACO.EDU.VN is committed to staying at the forefront of these advancements, providing technicians and tuners with the knowledge, skills, and tools they need to succeed in this evolving field. Our training courses cover the latest diagnostic techniques, tuning strategies, and safety procedures, ensuring that our graduates are well-prepared to work with the most advanced ECU systems.

9. Advantages of Seeking Training and Support from DTS-MONACO.EDU.VN

When it comes to mastering advanced diagnostics and ECU tuning, seeking training and support from a reputable institution like DTS-MONACO.EDU.VN offers numerous advantages.

9.1 Comprehensive Curriculum

DTS-MONACO.EDU.VN provides a comprehensive curriculum that covers all aspects of ECU diagnostics and tuning, from basic principles to advanced techniques. Our courses are designed to provide students with a solid foundation of knowledge and skills, enabling them to confidently tackle even the most complex diagnostic and tuning challenges.

9.2 Experienced Instructors

Our instructors are experienced professionals with extensive knowledge of ECU systems and tuning techniques. They provide personalized instruction and guidance, ensuring that each student receives the support they need to succeed.

9.3 Hands-On Training

DTS-MONACO.EDU.VN offers hands-on training that allows students to apply their knowledge and skills in a real-world setting. Our training facilities are equipped with the latest diagnostic tools and equipment, providing students with the opportunity to work on a variety of vehicles and ECU systems.

9.4 Industry-Recognized Certification

Upon completion of our training programs, students receive industry-recognized certification that validates their knowledge and skills. This certification can enhance their career prospects and demonstrate their expertise to potential employers.

9.5 Ongoing Support

DTS-MONACO.EDU.VN provides ongoing support to our graduates, offering access to technical resources, online forums, and expert advice. This ensures that our graduates have the support they need to continue learning and growing throughout their careers.

9.6 Access to Cutting-Edge Technology

DTS-MONACO.EDU.VN provides access to cutting-edge technology and software, including DTS-Monaco, allowing students to gain hands-on experience with the tools used by professionals in the field. This ensures that our graduates are well-prepared to work with the latest ECU systems and diagnostic techniques.

By seeking training and support from DTS-MONACO.EDU.VN, you can gain the knowledge, skills, and resources you need to excel in the field of ECU diagnostics and tuning.

10. FAQs: Diagnosing Aftermarket ECU Tunes

Here are some frequently asked questions about diagnosing issues with aftermarket ECU tunes:

10.1 Can a generic OBD-II scanner diagnose issues with an aftermarket ECU tune?

Generic OBD-II scanners can read standard diagnostic trouble codes (DTCs), but they often lack the ability to interpret tune-specific issues or access custom parameters used in the tune.

10.2 What is the best way to diagnose a lean condition after installing an aftermarket tune?

Using a wideband O2 sensor to monitor the air-fuel ratio (AFR) is crucial. Data logging with ECU tuning software can also help identify lean conditions under various driving conditions.

10.3 Can DTS-Monaco be used to diagnose aftermarket ECU tunes?

Yes, DTS-Monaco offers enhanced diagnostic capabilities and deep ECU access, but it requires expert knowledge and caution to avoid damaging the ECU or overwriting the tune.

10.4 What are the risks of flashing an ECU with an aftermarket tune using standard diagnostic tools?

Flashing the ECU can overwrite the aftermarket tune with factory settings, potentially damaging the ECU or voiding the vehicle’s warranty.

10.5 How can I identify if an aftermarket tune is causing misfires?

Monitor ignition timing and knock sensor data using data logging software or DTS-Monaco. Excessive timing retard and knock during misfire events indicate potential issues with the tune.

10.6 What should I do before working on a vehicle with an aftermarket ECU tune?

Verify the tune’s source and quality, and document all modifications made to the ECU. Use appropriate diagnostic tools and monitor engine performance regularly.

10.7 Is it necessary to seek professional training to diagnose and tune ECUs?

Yes, professional training from reputable institutions like DTS-MONACO.EDU.VN provides the knowledge, skills, and resources needed to safely and effectively diagnose and tune ECUs.

10.8 What is the role of dyno testing in diagnosing aftermarket tune issues?

Dyno testing measures power and torque output, helping identify performance issues, torque dips, and inconsistencies that can indicate problems with the tune or engine components.

10.9 How can AI and machine learning improve ECU diagnostics?

AI and machine learning analyze large amounts of data to identify patterns and anomalies, enabling technicians to diagnose issues more quickly and accurately.

10.10 What are some emerging trends in ECU diagnostics and tuning?

Emerging trends include advanced sensor technologies, AI-driven diagnostics, cloud-based platforms, enhanced cybersecurity, and integration with ADAS systems.

Are you ready to take your automotive diagnostic skills to the next level? Visit DTS-MONACO.EDU.VN today to explore our comprehensive training programs, advanced software solutions, and expert support services. Enhance your expertise in car coding, ECU tuning, and advanced diagnostics with our industry-leading resources. Contact us at Address: 275 N Harrison St, Chandler, AZ 85225, United States. Whatsapp: +1 (641) 206-8880. Website: DTS-MONACO.EDU.VN.