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Bosch EDC17CP45 - TC1797

Bosch EDC17CP45 - TC1797 Errors & Solutions

Errors

Quick access to common errors and solutions for the Bosch EDC17CP45 ECU.

7F-31-22

This error occurs when specific vehicle conditions, like buckling the seat belt or connecting a power supply, are not met before programming.

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Checksum is invalid. error code : 0x00000001

Indicates an incorrect checksum in the file, often due to previous modifications, but can usually be ignored during programming.

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7F-22-12

This error appears when attempting an OBD flash on an unsupported vehicle series, such as an E-series BMW, instead of the required F/G-series.

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No Data to read

Occurs when the tool fails to establish communication, which can often be resolved by resetting the vehicle's state.

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Concerns vehicles from

Alpina Logo BMW Logo

7F-31-22

Method: OBD

Issue: The programming process is blocked because the vehicle is not in the required state for communication.

Solution
  • Ensure the seat belt is buckled.
  • Connect a stable power supply to the vehicle.
  • Set the gearbox to 'P' (Park) mode.
  • Close all doors and lock the car.
  • Wait for 5 minutes before attempting the operation again.
To understand more

Modern ECUs require specific safety and operational conditions to be met before allowing programming access. This 'pre-flight check' prevents accidental flashing during unsafe conditions, and waiting five minutes allows the vehicle's CAN bus system to enter a stable sleep state.

Checksum is invalid. error code : 0x00000001

Method: Bench

Issue: The tool detects that the checksum within the ECU's software is incorrect, raising a validation error before writing.

Solution
  • For most Bosch MEDC17 ECUs, you can safely ignore this warning and proceed with programming.
  • If the same error occurs during the programming phase, do not proceed and instead Contact our technical support.
To understand more

A checksum is a digital fingerprint used to verify file integrity. This error often appears if the ECU was previously tuned with another tool that uses a different checksum calculation method. While the tool flags the mismatch, it can typically correct it during the writing process.

7F-22-12

Method: OBD / Recovery: Bench or Boot

Issue: An attempt was made to use the OBD protocol on an unsupported vehicle platform, specifically a BMW E-series model.

Solution
  • Verify the vehicle's series. This OBD protocol is only compatible with F-series and G-series models.
  • For E-series models, you must use a different communication method, such as Bench or Boot mode.
To understand more

Different vehicle generations (like BMW's E, F, and G series) use distinct communication protocols. The OBD flashing procedure for newer F/G series is not backward-compatible with the older E-series ECU architecture, requiring a more direct connection method.

No Data to read

Method: OBD

Issue: The tool is unable to receive any data from the ECU, indicating a communication failure.

Solution
  • Close all car doors and ensure the vehicle is locked.
  • Wait for a full 5 minutes to allow the vehicle's systems to reset.
  • Attempt the reading procedure again.
To understand more

This error often happens when the vehicle's CAN bus is active. Locking the car and waiting forces the various electronic modules to enter a sleep state, clearing traffic on the network and allowing the tool to establish a clean communication with the ECU.