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Bosch MEVD17.2.G - TC1797

Bosch MEVD17.2.G - TC1797 | FAQ and Troubleshooting

Bosch MEVD17.2.G - TC1797

Errors

Quickly identify and resolve common communication issues encountered with the Bosch MEVD17.2.G control unit during diagnostic or tuning sessions.

UDS diagnosticSessionControl Rx error

This error occurs when an external device disrupts the diagnostic communication session on the CAN bus.

View Solution →

Concerns vehicles from

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UDS diagnosticSessionControl Rx error

Method: OBD

Issue: The diagnostic session cannot be established or is interrupted because of simultaneous CAN bus activity from unauthorized hardware.

Solution
  • Identify and physically disconnect any external modules connected to the vehicle's diagnostic port or CAN network.
  • Common culprits include P3 Gauges, JB4 tuning boxes, or third-party dash cameras connected to the OBD line.
  • Ensure all aftermarket electronic accessories are completely disabled before attempting to read or write the ECU.
  • If the problem persists, Contact our technical support.
To understand more

The UDS (Unified Diagnostic Services) protocol requires an exclusive communication channel between the flashing tool and the ECU. When a device like a P3 Gauge continuously polls the ECU for data at the same time, it causes packet collisions on the RX (Receive) line, leading to a session failure. Disabling these devices ensures the bus is clear for stable data transmission.