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Bosch EDC17C50 - TC1797

Bosch EDC17C50 - TC1797 | bFlash Errors & Solutions

Errors

[ISOTP API] No data to read...

This error occurs due to a communication loss during flashing, often requiring a vehicle reset.

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TSW TransferData RX error

Indicates a wiring problem, often caused by a poor connection or a gap in the pinout during bench operations.

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7F-31-22

Results from unmet vehicle conditions required for the operation, such as seat belt status or gearbox state.

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Concerns vehicles from

BMW Logo Mini Logo

[ISOTP API] No data to read from isotp stack A... : UDS readDataByIdentifier Rx error.

Method: OBD

Issue: The tool reports a communication error and cannot read data after a flash was interrupted.

Solution
  • Close the vehicle completely (lock doors, turn off ignition) and wait for at least 5 minutes before retrying the operation.
To understand more

This error happens when the ECU's communication state is disrupted after an incomplete flash. Waiting for 5 minutes allows the vehicle's CAN bus to go to sleep and the ECU to reset its internal state, clearing the temporary communication fault and allowing a fresh connection attempt.

TSW TransferData RX error

Method: BENCH

Issue: Data transfer fails during a bench operation, specifically indicating an error receiving data.

Solution
  • Thoroughly inspect all wiring connections between the bFlash tool and the ECU.
  • Ensure every pin is making a solid, secure connection and there are no gaps or loose wires.
To understand more

The 'RX error' specifically points to a problem with receiving data from the ECU. On the bench, this is almost always a physical connection issue. A loose pin, faulty wire, or incorrect pinout prevents the stable flow of data required for the read/write operation to succeed.

7F-31-22

Method: OBD

Issue: The operation is rejected by the vehicle with an error code indicating that specific prerequisite conditions are not met.

Solution
  • Connect a stable power supply to the vehicle to ensure consistent voltage.
  • Buckle the driver's seat belt.
  • Set the gearbox to Park (P) mode.
  • Close the vehicle completely (lock doors) and wait for 5 minutes before attempting the procedure again.
To understand more

Error 7F-31-22 is a generic 'conditions not correct' response from the ECU. Modern vehicles require a specific set of safety and operational conditions to be met before allowing diagnostic or programming access via OBD. Fulfilling these prerequisites ensures the vehicle is in a safe, stable state for flashing.