Experiencing problems with your Sprinter’s Anti-lock Braking System (ABS) and Electronic Stability Program (ESP) can be concerning. Many Sprinter owners rely on the Xentry diagnostic system to pinpoint issues, but sometimes, understanding the error codes Xentry provides can be challenging. This article delves into a real-world scenario where a Sprinter owner is grappling with ABS/ESP problems and seeks to decipher the error codes presented by Xentry, aiming to provide insights and potential troubleshooting steps for those facing similar challenges.
The owner initially encountered issues indicated by a persistent red “BRAKE” light on the dashboard, without the usual ABS warning light. Interestingly, despite not having cruise control, Diagnostic Trouble Codes (DTCs) related to cruise control were also present. Initial troubleshooting involved checking ABS voltages at various pins (2, 3, and 28), which were confirmed to be functional. Furthermore, utilizing Xentry to actuate the ABS pump resulted in audible operation, suggesting the pump itself was not entirely inactive.
To gain a better understanding, the owner consulted online resources, which indicated potential issues ranging from wiring and connections to sensor malfunctions. The advice highlighted components like speed sensors, steering angle sensors, brake pressure sensors, and more, all crucial for the ABS/ESP system’s proper operation. This preliminary research set the stage for a deeper dive using the Xentry diagnostic tool.
During the Xentry diagnostic process, several key pieces of information emerged. Xentry suggested performing SCN coding for both the instrument cluster and the ESP/ABS module. Specifically, for DTC 7201, related to the Engine Control Module (ECM) communication via the CAN bus, Xentry outlined a repair flowchart suggesting control module programming and checks on the engine CAN bus. The error code DTC 7201 was identified as “One or more signals sent from control unit Engine control module via the CAN bus is implausible,” with a status of “Current and stored.” The owner thoughtfully included a visual representation of the engine CAN bus results obtained from Xentry, further aiding in understanding the diagnostic data.
One specific sensor reading that raised concern was the brake pressure sensor. Xentry expected readings of around +/- 8 bars at idle and above 12 bars at higher RPM. However, the readings obtained were significantly lower, ranging from 0.5 to 1.9 bars at idle and approximately 58 bars at higher RPM. The location of the brake pressure sensor became a point of inquiry, indicating a need for further investigation into the sensor’s functionality and potential replacement.
Adding another layer of complexity, Xentry reported that all four-wheel speed sensors’ “GAP” were not within acceptable parameters. This “air gap” issue with wheel speed sensors is a known cause of ABS problems in various vehicles, including Sprinters. The owner recalled seeing forum discussions about resolving ABS issues by addressing wheel speed sensor air gaps, prompting them to consider this as a primary area of focus for repair.
The next logical step, as suggested by both Xentry’s error codes and online community knowledge, is to investigate the wheel speed sensors and their air gaps. Addressing the “air gap” on all four sensors is proposed as a starting point for resolving the ABS/ESP issues. This hands-on approach, combined with the diagnostic insights from Xentry, offers a structured path towards troubleshooting and hopefully resolving the “Xentry Giving Error Code” and restoring the Sprinter’s ABS/ESP system to full functionality. Further investigation into the brake pressure sensor and the CAN bus communication issues may also be necessary depending on the outcome of the wheel speed sensor air gap adjustment.
