Defect Code 43 - 52

Defect Codes 43-52:

*D* Defect code memory: Data transfer to a unit connected to the I-bus defective:

Explanation: This defect code is stored when the data transfer to one or several units connected to the I-bus is defective.

Note: The screen page *D* special function - coding data indicates which I-bus users (= control units connected to I-bus) are installed in the vehicle.

Troubleshooting:

- f data transfer to all I-bus users installed in the vehicle is defective, check plug connection at the EKM (brown connector, Pin I = I-bus) and I-bus data link ahead of the branch to the control units
- If data transfer to only I-bus user is defective, check data link from the EKM to the control unit.
- If the I-bus data link is OK: Connect EKM and instrument cluster. Clear defect code memory. Then wait at least 60 5 to allow for sufficiently long data traffic to take place between the EKM and I-bus user. If the defect code is stored once again, as a check, renew I-bus user.