Defect Code 55

Defect Code 55:

*D* Defect code memory: Data traffic via the IA)us defective:

Explanation: This defect code is stored when the EKM receives or sends incorrect or faulty data

Note: As part of the troubleshooting procedure, a check is made as to whether the EKM or an I-bus user is defective.

Troubleshooting:

- Check the I-bus interface in the EKM: Detach blue and brown connector from EKM. Do not detach green connector and 5-pole connector. Switch on ignition, clear defect code memory, wait 60s (EKM internally checks the I-bus). Select defect code memory and check whether the defect code 55 has been stored again (ignore all other defect codes) The EKM has an internal defect if defect code 55 is stored again. Renew EKM. (System test not necessary)

- Check the I-bus users: Reconnect all EKM connectors. Switch on ignition, clear defect code memory, wait 60 5 (EKM checks the I-bus) Select defect code memory and check whether the defect code 55 has been stored again (If one or several defect codes between defect code no.s 43 and 54 are additionally stored, these defects must be rectified first) An I-bus user is defective if the defect code 55 is stored once again.

- Further procedure: Switch oft ignition. Disconnect the individual I-bus users one after the other from the I-bus. Switch on ignition. Clear the defect code memory after each disconnected unit, wait 60 s and then check whether the defect code 55 has been stored again.

- If the defect code 55 is no longer stored as soon as a certain unit is disconnected from the I-bus, then it is This unit that is causing the defect Renew the defective unit.