Description of On-Board Diagnostic System

Notes on the BMW DIAGNOSTIC SYSTEM:

The relays are stored as being defective during simulation of the outputs. For this reason, the defect code memory is cleared automatically after simulation. Re-detection of the defect codes: Operate power windows from the vehicle.

The OFF display for the end position sensors signifies window open. The sensors switch ground to the general module.

The defect code memory can detect and store the following defect codes:

1. Power window/sunroof relays in relay module do not pick up or stick.
2. Power windows deactivated by position/time monitoring (end position sensor defective).

Power windows are detected as "not installed":

After the supply voltage is applied (terminal 30 at Pin A1), the ZKE general module checks whether the diagnostic links for FH and SHD (Pin C16 or C3) are applied to ground. If the inputs are open, the power windows and sunroof will be detected as not installed.

If the general module is installed with the vehicle battery connected, the undefined contacting when plugging in the module can result in the inputs being detected as open and thus the FH/SHD as "not installed".

The power windows do not operate in this case!

If the vehicle is equipped with power windows but they are not detected by the general module, disconnect the vehicle battery for at least 5 seconds.

If the power windows are still detected as "not installed" after reconnecting the vehicle battery (and reselection of ZKE!), perform troubleshooting in accordance with defect codes 01-07 (relay defect stored).

Caution! Danger of injury! Observe caution in the area of the power windows during simulation of the outputs! Danger of injury by closing window!

Troubleshooting:

Notes:

- Troubleshooting with BMW DIAGNOSTIC SYSTEM
- Battery charged, U-min = 12 V
- If all functions of the central body electronics (ZKE) are defective, perform troubleshooting in accordance with Central Body Electronics (ZKE).
Central Control Module
- If the electronic power fuse is indicated as being defective or if the fuse is OFF despite the ignition being switched on (*D* 027 Electronic power fuse), continue with Central Body Electronics (ZKE).
Central Control Module

Important!

When the supply voltage is applied (terminal 30 at Pin A1), the ZKE general module detects which partial systems are installed in the vehicle. Undefined contacting when plugging in the module can result in systems not being detected. Therefore:

Disconnect the vehicle battery before installing the ZKE general module!

or

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

Refer Central Body Electronics (ZKE), Functional Description.
Central Control Module