12 51 245 Replacing the wiring harness section for the engine transmission module (N20)
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION)
.
Necessary preliminary tasks:
- Read out the fault memory of the DME control unit.
- Switch off ignition.
- Remove intake PLENUM .
- Remove rear UNDERBODY PROTECTION .
- Remove cross member . See 22 32 050 REPLACING CROSS MEMBER FOR TRANSMISSION MOUNTING or 22 31 050 REPLACING CROSS MEMBER FOR TRANSMISSION MOUNTING for transmission mounting.
Overview of wiring harness section for engine transmission module (graphic shows wiring harness for vehicles with automatic transmission and four-wheel drive).
Detach all connectors from Power Distribution Module (1). Release wiring harness from bulkhead.
Disconnect plug connection (2).
Release screws (3) and lay wiring harness to one side.
| Unlock and disconnect following connectors and lines | |
|---|---|
| Unlock and disconnect connector on DME control unit | |
| Unlock connector on air conditioning compressor and disconnect | |
| Unlock connector on starter motor and disconnect | |
| Release ground cable | |
| Release positive wire from bulkhead panel | |
| Unlock and disconnect connector for wiring harness section of engine sensor system module 1 | |
| Unlock and disconnect connector on reversing light switch | Manual gearbox only |
| Unlock connector on transmission and disconnect | Automatic transmission only |
Release wiring harness if necessary from existing clips and clamps.
Feed out wiring harness and remove.
Installation note:
Check wiring harness installation arrangement.
Check plug connections for correct fit.
Check stored fault message.
Clear diagnostic fault entries from fault memory.