An Actron CP9135 OBDII scanner successfully diagnosed an ignition coil failure on a 1998 Mercedes Benz E320. However, the same scanner isn’t detecting any faults related to newly illuminated ETS and ABS warning lights. This article explores the capabilities of Actron Obdii scanners, specifically addressing whether they can read ETS and ABS codes on a Mercedes Benz and offering potential solutions for troubleshooting these warning lights.
Understanding Actron OBDII Scanners and Mercedes Benz Fault Codes
Actron OBDII scanners are valuable tools for diagnosing engine-related problems by reading Diagnostic Trouble Codes (DTCs). They excel at identifying issues related to emissions, misfires, and other powertrain components. However, ABS and ETS (Electronic Traction System) utilize separate control modules and communication protocols in Mercedes Benz vehicles. These systems often require a more advanced scan tool capable of accessing manufacturer-specific codes beyond standard OBDII protocols. Therefore, an Actron OBDII scanner, while effective for engine diagnostics, may not be equipped to retrieve ABS and ETS fault codes on a Mercedes.
Troubleshooting ETS and ABS Warning Lights on a Mercedes Benz
While an Actron OBDII scanner might not pinpoint the exact cause of the ETS and ABS lights, several potential culprits common in Mercedes Benz vehicles should be investigated:
- Brake Light Switch: A faulty brake light switch can trigger both ETS and ABS warnings. While the switch was recently replaced and tested, it’s worth double-checking its functionality and installation. A simple test involves observing the brake lights while depressing the pedal. Inconsistent or flickering brake lights could indicate a problem.
- Wheel Speed Sensors: Malfunctioning wheel speed sensors can disrupt ABS and ETS operation, especially when turning. These sensors provide crucial data for these systems to function correctly. A specialized scanner can read individual wheel speed sensor data to pinpoint a faulty sensor.
- Steering Angle Sensor: The steering angle sensor informs the ETS about the steering wheel’s position. A faulty sensor can lead to inaccurate traction control intervention and illuminate the warning light. Again, a more advanced diagnostic tool is required to access this sensor’s data.
- Battery Voltage: Low or fluctuating battery voltage can cause erratic behavior in various electronic systems, including ABS and ETS. Checking the battery’s health and charging system is crucial.
Beyond the Actron OBDII Scanner: Next Steps
Given the limitations of a standard Actron OBDII scanner in diagnosing Mercedes-specific systems like ABS and ETS, the next logical step is to utilize a more advanced scan tool. Professional-grade scanners or those specifically designed for Mercedes Benz vehicles can access manufacturer-specific codes and provide more detailed information. This will enable a more accurate diagnosis and targeted repair. Consider consulting a qualified Mercedes Benz technician or investing in a higher-end diagnostic tool to effectively troubleshoot and resolve the ETS and ABS warning light issue.
