12 51 235 Removing and installing/replacing wiring harness for engine sensor system module 1 (N20 hybrid drive)
WARNING:
High-voltage system - danger to life
Compliance with the following points is mandatory before beginning work:
Compliance with the following points is mandatory before beginning work:
- Observe SAFETY INFORMATION for handling electric vehicles.
Attention!
Observe notes on PROTECTION FROM ELECTROSTATIC DAMAGE .
Necessary preliminary tasks:
- Remove intake PLENUM .
- Remove CENTER ENGINE BULKHEAD .
- Remove REINFORCEMENT PLATE .
Removal:
Feed out acoustic foam (1) towards the top and remove.
Remove cover (1) on oil sump.
Overview, engine sensor system wiring harness module 1:
| Unlock and disconnect following connectors and lines | |
| Unlock connector on charging pressure sensor and disconnect | |
| Unlock connector on hot film air mass meter and disconnect | |
| Unlock and disconnect the connector from the pressure sensor on the intake plenum | |
| Unlock connector on oxygen sensor and disconnect | |
| Unlock connector on monitoring sensor and disconnect | |
| Unlock connector on pressure converter and disconnect | |
| Unlock connector on rail pressure sensor and disconnect | |
| Unlock connector on tank vent valve and disconnect | |
| Unlock connector on toothed belt starter motor and pull off | |
| Unlock connector on both knock sensors and disconnect | |
| Release connector on oil pressure/temperature sensor and disconnect | |
| Unlock connector on fuel low-pressure sensor and disconnect | |
| Unlock connector on throttle body and disconnect | |
| Unlock connector on high pressure pump and disconnect | |
| Unlock connector on air conditioning compressor and disconnect | |
| Unlock connector on oil level sensor and disconnect | |
| Unlock connector on crankshaft sensor and disconnect | |
| Unlock connector on heating element for air duct and disconnect | |
| Unlock connector on coolant thermostat and disconnect | |
| Unlock connector on hydraulic valve and disconnect | |
| Unlock connector on the coolant pump and disconnect | |
| Unlock connector on exhaust turbocharger and disconnect | |
| Unlock connector on both camshaft adjustment solenoid valves and disconnect | |
| Unlock connector on intake camshaft pulse sensor and disconnect | |
| Unlock connector on exhaust camshaft pulse sensor and disconnect | |
| Unlock connector on oil pressure switch and disconnect | |
| Unlock connector on switching motor for eccentric shaft and disconnect |
Release wiring harness if necessary from existing clips and clamps.
Feed out wiring harness and remove.
Installation:
Feed in and install the acoustic foam (1).
Route and install wiring harness.
Plug in all connectors as specified in table.
All connectors must audibly engage.
Required reworking:
- Install INTAKE PLENUM .
- Install ENGINE BULKHEAD CENTER .
- Install REINFORCEMENT PLATE .