12 51 235 Removing and installing/replacing engine sensor system module 1 wiring harness

WARNING: High-voltage system - danger to life
Compliance with the following points is mandatory before beginning work:

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .

Necessary preliminary tasks:

Fig 1: Identifying Engine Sensor System Module Wiring Harness

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock connector (1) and pull off from the power distribution box.

Unlock connector (2) and pull off from pulse sensor on intake camshaft.

Unlock connector (3) and pull off from pulse sensor to crankshaft.

Unlock connector (4) and pull off from coolant temperature sensor.

Unlock connector (5) and pull off from tank vent valve.

Unlock connector (6) and pull off from monitoring sensor.

Unlock connector (7) and pull off from main wiring harness.

Unlock connector (8) and pull off from throttle valve.

Unlock connector (9) and pull off from control sensor.

Release wiring harness if necessary from existing clips and clamps.

Feed out wiring harness and remove.

Installation note:

Check the wiring harness installation arrangement.

Check that the plug connections are correctly fitted.

Check fault code entry.

Clear diagnostic fault entries from fault memory.