Description
A2249 Digital diesel electronics control unit
Connector location views
| Number | X-pin, colour | Description |
|---|---|---|
| X2411 | 96-pin, black | Plug connector Digital diesel electronics control unit Module 1 |
| X2412 | 58-pin, black | Plug connector Digital diesel electronics control unit Module 2 |
Reference: https://bmwteka.com/wds/en/e46/57c2b64c
Control unit DDE 5.0
Important! Please observe when replacing a control unit with which no communication was possible!
After the control unit has been replaced and programmed, injector volume calibration must be carried out. The codes of the injectors fitted on the vehicle must be stored on the new control unit. To perform this operation, use service function тInjector volume calibrationт.
Introduction
The control unit connector is a modular design consisting of two connector modules with a total of 154 pins.
- Connector module 1: 96 pins (interface with engine and injector wiring loom)
- Connector module 2: 58 pins (control unit power supply and interface with vehicle wiring loom)
Supply voltages
The DDE control unit supplies a number of sensors with a 5 V power supply as detailed below:
- Supply voltage 1: pedal position sensor 1 (PWG), rail-pressure sensor
- Supply voltage 2: pedal position sensor 2 (PGS), turbocharger pressure sensor, air mass-flow meter
- Supply voltage 3: Crankshaft position/rpm sensor
DDE warning lamp activation
The DDE warning lamp is activated when the following faults occur:
- Pedal position sensor
- Fuel rail pressure too high/too low
- Analogue-digital converter monitoring on DDE control unit
Troubleshooting
The DDE control unit is monitored for different internal faults.
Reference: https://bmwteka.com/wds/en/e83/dc54ab17
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