12 51 235 Replacing wiring harness section for engine (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 .
Overview, engine sensor system wiring harness module 1.
| Unlock and disconnect following connectors and lines | |
|---|---|
| Unlock connector from suction pressure sensor on the intake plenum and disconnect | |
| Unlock connector from suction pressure sensor on the pressure pipe and disconnect | |
| Unlock connector on throttle body and disconnect | |
| Unlock connector on oil level sensor and disconnect | |
| Unlock connector on zero-gear sensor and disconnect | Manual gearbox only |
| Unlock connector on hydraulic valve and disconnect | |
| Unlock connector on crankshaft sensor and disconnect | |
| Unlock connector on high-pressure fuel sensor and disconnect | |
| Unlock connector on oxygen sensor and disconnect | |
| Unlock connector on both knock sensors and disconnect | |
| Unlock connector on monitoring sensor and disconnect | |
| Unlock connector on high pressure pump and disconnect | |
| Unlock connector on pressure converter and disconnect |
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.