Important Information

Important Information:

Pin Assignment:

The following prerequisites must be observed when performing tests on the vehicle:

- Vehicle battery charged, U-min> 12 V.

- All values apply to the control unit when connected and fully operable.

- Special adapters are used for measurements.

- The control unit must be in operating status, the ignition (terminal 15) switched on.

- All measured values are mean values. If no tolerances are specified, a permissible measured value deviation of 10 % will apply.

- Measured data at 0 V have a permissible voltage range of 0 to 2 V.

- Only use the measuring equipment recommended by BMW AG for all measurements.

Troubleshooting:

The following prerequisites must be observed when performing troubleshooting operations on the vehicle:

- Vehicle battery charged, U-min> 12 V.

- Only disconnect control units from the wiring harness when the ignition is switched off.

- All fuses required for trouble-free operation of the system are OK.

- Wires are checked in accordance with the electrical wiring diagrams.

- Perform continuity tests (resistance measurement) on wires only with the control unit or component connectors detached.

- Refer to general information on wire testing.

- When control units are removed and installed, defect codes are set in the defect code memory of the control units without there actually being a malfunction. Therefore:

- Print out defect code memory prior to removal

- Clear defect code memory on completion of troubleshooting

- Correct installation and removal of components is described in Service and Repair.

- Perform checks at the plug-and-socket connections only with the special adapter leads provided for this purpose.