Me 7.2 System Overview - BMW 5251 Service Manual

130-67
Fuel Injection
/
ME 7.2 system overview
The Bosch ME 7.2 system is used on 1999
-
2002 540i mod-
els.
1
4
The ME 7.2 enaine control module (ECM). located on the
l
and a combined total of 134 pins.
--__--
1
I . 9 pin connector
1 2 3 4 5
2 24 pin connector
0lliC;nii,
3. 52 pin connector
4. 40 pin connector
5. 9 pin connector
The ME 7.2 system has the following functions or capabilities:
Electronic throttle control (EDK) integrates idle and cruise
control functions. ECM carries out all throttle and idle con-
trol functions directly via EDK system.
Leak diagnosis pump (LDP) control and feedback monitor-
ing for evaporative system leak testing.
Batterylalternator charge logic (idle speed varies with bat-
tery state of charge).
CAN-Bus communications with instrument cluster.
EWS 111 (3.3) "rolling code" ISN interface.
Ignition knock sensors.
DSC (dynamic stability control) torque reduction.
Monitoring and control of VANOS (camshaft timing) with
active Hail sensor for camshaft position monitoring.
Integrated altitude sensor.
One touch engine start control
Single speed secondary air injection system.
Long life spark plugs.
IHKA auxiliary (electric) cooling fan control.
All emissions-related ME 7.2 electrical components are mon-
itored for faults. if driveability complaints are encountered or
the malfunction indicator light (MIL) is illuminated, interrogate
fault memory using a compatible scan tool.
4
Use a break-out box for ME 7.2 system testing and diagnosis
at the control module (break out box set: BMW special tool
90 88 6 121 300).
Electrically heated (characteristic map) cooling system
DME Harness Connector
thermostat.