Description of On-Board Diagnostic System

Notes on the BMW DIAGNOSTIC SYSTEM:

Diagnosis with the ZKE II:

For general information on the diagnostic procedure with ZKE II (central body electronics), refer to Central Body Electronics.
Central Control Module

Defect code memory:

Defects involving the activation systems (wires, relay module) are stored in the defect code memory.

Test procedure:

The test procedure enables guided inspection of the central locking system. It is subdivided into two groups:

- Central locking for driver's/passenger's door and fuel tank lid
- Rear lid locking/rear lid opening

To check the door locks, the ignition can be switched off and the vehicle key removed. However, due to the diagnostic procedure in conjunction with the EKM, after switching off the ignition, the driver's door must not be opened and closed, since this would immediately interrupt the diagnostic procedure. it is therefore recommended to remove the key through the passenger's door.

Troubleshooting:

Notes:

- Troubleshooting with the BMW DIAGNOSTIC SYSTEM
- Battery charged, U-min = 12V
- If all functions of the ZKE are faulty, perform troubleshooting in accordance with Section ZKE Central Body Electronics. Central Control Module
- ZV motor drives of the driver's and passenger's door must by synchronized
- see functional description, defect information -,
- If the electronic power fuse is signalled as faulty ( *D* 95 Electronic power fuse: Overcurrent in power circuit in driver's side), go to Section ZKE Central Body Electronics. Central Control Module