Description of On-Board Diagnostic System

Notes on the BMW DIAGNOSTIC SYSTEM:

The defect code memory of the central body electronics ZKE is cleared during simulation of the outputs. To redetect the defect code, activate the headlight washer pump from the vehicle by selecting "wash" function.

The defect code memory registers a defective SRA relay.

If the SRA pump runs without water, the SRA relay may be stored mistakenly as being defective due to after running of the pump.

SRA is detected as "not installed":

After the supply voltage has been applied (terminal 30 at Pin A1), the ZKE general module checks whether the diagnostic link for the SRA module (Pin D21) is connected to ground. If the input is open, the SRA is detected as "not installed".

If the general module is installed with the vehicle battery connected, undefined coding when plugging in the module may result in the input being detected as open and thus the SRA as "not installed".

If an SRA system is installed in the vehicle but not detected by the diagnostic program, disconnect the vehicle battery for at least 5 seconds.

If the SRA is still detected as "not installed" after reconnecting the vehicle battery (and reselecting ZKE!), carry out troubleshooting in accordance with defect code 01 (defect code SRA relay stored).

Troubleshooting:

Notes:

- Troubleshooting with the BMW DIAGNOSTIC SYSTEM
- Battery charged, U-min 12 V
- If all central body electronics (ZKE) functions have failed (central locking system, power windows, windscreen wiper pressure control and windscreen wiper/washer system), carry out troubleshooting in accordance with Central Body Electronics (ZKE).
- If, in addition, the windscreen wiper or the windscreen washer system has failed, carry out troubleshooting in accordance with ZKE Windscreen Wiper Control.

Important!

When the supply voltage is applied (terminal 30 at Pin Al)' the ZKE general module checks which part Systems are installed in the vehicle. Undefined contacting when plugging in the module can result in systems not being detected. Therefore:

Disconnect vehicle battery before installing a ZKE general module

or

Disconnect vehicle battery for at least 5 seconds after installing a ZKE general module.

Also refer to Central Body Electronics (ZKE), Functional Description.
Central Control Module