12 51 303 Removing and installing/replacing engine wiring harness section, sensor system module cylinder 5-8 (N63 B40/44 O 1)
IMPORTANT:
Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION)
.
IMPORTANT:
Screw back on all screw points of cable channels without fail!
Some screw points are also ground points
. If the wiring harnesses are not correctly screwed tight and secured, this may cause DME malfunction and failure!
Necessary preliminary tasks:
- Read out the fault memory of the DME control unit.
- Switch off ignition.
- Remove left INTAKE PLENUM .
Overview of wiring harness section, sensor system module cylinder 5-8.
Slacken nut (1).
Tightening torque 12 51 2AZ .
Remove ground cable.
IMPORTANT:
If the nut (1) is released, the ground pin (double pin) underneath must
be retightened!
Retighten ground pin.
Tightening torque 12 51 3AZ .
Retighten ground pin.
Tightening torque 12 51 3AZ .
IMPORTANT:
Screw back on all screw points of cable channels without fail. Some screw points are also ground points.
| Unlock and disconnect following connectors and lines | |
| Unlock connector on left intake camshaft pulse sensor and pull off | |
| Unlock connector on left exhaust camshaft pulse sensor and pull off | |
| Unlock connector on left hot film air mass meter and pull off | |
| Unlock connector on left high pressure pump and pull off | |
| Unlock connector on left control sensor and pull off | |
| Unlock connector of left monitoring sensor and pull off | |
| Unlock connector on left high-pressure fuel sensor and pull off | |
| Unlock connector on left intake air pressure sensor and pull off | |
| Unlock connector on left knock sensors and pull off | |
| Unlock connector of left charging pressure sensor and pull off | |
| Unlock connector on left throttle body and pull off | |
| Unlock connector on solenoid valves camshaft adjustment, left and pull off | |
| Unlock connector on the exhaust turbochargers and disconnect | |
| Unlock connector on alternator and disconnect | |
| Unlock plug on left inlet camshaft pulse generator and disconnect | |
| Unlock plug on left exhaust camshaft pulse generator 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.