Honda Bmw 5 Service Manual

. - 
Fuel Injection I 
Working inside E-box, disconnect ECM harness  connector 
(arrow)  by releasing  fastener and pivoting  connector  up and 
off  ECM. 
CA UTIOW 
Be  sure ignition  is OFF before disconnecting  or reconnecting 
DME system components. 
Remove  ECM from  retaining brackets and lift off  holder. 
Installation is  reverse of removal 
Before attempting  to start engine,  use 
BMW service  tester 
DISplus, MoDiC, GTl or equivalent: 
* Code  replacement  ECM with application  information...

.- 
/Fuel Injection 
I  I - I 
9 /ln~ut l~oltaqe supply I Fuse carrier, engine electronics 
Table 
c. Siemens  MS 42.0  and MS 43.0  ECM  pin assignments (continued) I  I . I 
Connector X60002 24-pin 
1 linput IHeater, precatalyst oxygen sensor 1 I Heated oxygen sensor 1 in front  of cat. conv. 
I I I 
18 llnout IHeater, post-catalyst oxygen sensor 2 ]Heated oxygen sensor 2 behind  cat. conv. 
Notes 
Ground connector 
Ground connector 
B+ terminal 
Fuse carrier, engine electronics 
Pin 
5 
6 
7 
8 
I I...

130-43 
Fuel Injection ] 
I I I 
12 llnput IFeedback signal, engine start /Starter 
Table c. Siemens  MS 42.0 and MS 43.0 ECM  pin assignments  (continued) 
I I - I 
13 Input /I Alternator (generator) Notes 
Throttle 
valve 
Crankshaft position sensor 
Throttle  valve  (MS 
42.0) 
Throttle valve 
Pin 
6 
7 
8 
9 
10 
11 
14 
15 
16 
17 
18 
19 
20 
I 1- I 
23 l~round I~round, intaite air temperature sensor /Intake air temperature sensor 
Signal 
Output 
Input 
Input 
Input 
I  I I 
Component/function...

Fuel Injection 
Table c. Siemens  MS 42.0  and MS 43.0 ECM pin assignments (continued) 
Pin 
42 
43 
44 
45 
46 
47 
48 
49  50 
51 
52  Componentlfunction 
Signal, evaporative emissions valve 
Signal, throttle 
valve drive 
Signal, throttle  valve drive 
Signal, engine coolant thermostat 
Signal,  close idle  speed control valve 
Signal,  open idle  speed control  valve 
Signal, shield 
ltnock sensor 
Signal, resonance  valve 
intake system 
Not  used 
Not used 
Signal, secondary  air injection pump...

Fuel Injection 
Table c. Siemens MS 42.0 and MS 43.0 ECM pin assignments (continued) 
40 
I I - . I - 
9 llnput /signal, ignition  coil 4 I Ignition coil 4 
Not used 
1 
2 
3 
4 
5 
6 
7 
8 
Connector X60005 9-pin 
Input 
Input 
Input 
Ground 
Ground 
Input 
Input 
Signal, ignition  coil 3 
Signal, ignition coil 2 
Signal, ignition coil 1 
Not used 
Ground  Ground 
Signal,  ignition coil 
6 
Signal, ignition coil 5 
Ignition coil 3 
Ignition coil 2 
Ignition coil 1 
Ground connector 
Ground connector...

130-46 
Fuel Injection 
When  system  faults are detected, a  diagnostic trouble code 
(DTC)  is stored  in the  engine  control module  (ECM). The MIL 
also  illuminates  if an emissions-related  fault  is detected. 
When  faults arise,  or 
if the malfunction indicator lamp  (MIL) is 
illuminated,  begin troubleshooting  by connecting  BMW ser- 
vice tester 
DISplus. MoDiC, GTI or  equivalent scan tool.  The 
capabilities  of 
OED II software has  the potential  to save hours 
of  diagnostic  time and...

Fuel Injection 
M5.2 system features 
The Bosch M5.2  system used on 1997 540i  models uses  an 
88-pin control  unit. The 
M5.2 system has the following func- 
tions  and capabilities: 
Fully sequential cylinder-individual  fuel injection. 
Integrated adaptive knock control. 
Oxygen  sensor fuel mixture control. 
0 Self-diagnosis  and emergency operation characteristics. 
CAN-Bus  link. 
0 OED II functions  (misfire detection,  catalytic converter 
monitoring,  oxygen sensor monitor, and fuel  tank...

Fuel Injection   

- Fuel Injection 
ECM relay, testing 
The engine control module (ECM) relay is energized via  the 
ECM and  supplies battery positive 
(B+) power to many  of the 
engine 
management components and subsystems.  If this re- 
lay is faulty,  the engine will not start. 
CAUTIOI\C 
Relay positions can vary. Be sure  to confirm relay position  by 
identifying  the wiring 
in the socket  using the wiring  diagrams 
in ELE Electrical Wiring  Diagrams. 
NOTE- 
The ECM relay is also referred  to as  the DME main...

130-50 
Fuel Injection 
Bosch M5.2 
ECM relay 
1 HoL al ail iirnel XOL a1 ail limes 
i--[-----i F109 (BOA) electronics I L.$.....: .I: 
ECM relay . . . . . . . . . , 
8,s 
:, 
6 1 .. ... ~~.~~. . ...... .-, Engine control ii~~-~.~~..~ ........ ~~~~~~.~~~~:. module relay -;I 
Of? 
,c,;,,, 
< With ignition  off, remove ECM relay  (arrow) in electronics 
box (E-box)  at right rear  of engine  compartment. 
NOTE- 
Relay locations can  vary. Conh relay identification  by 
matcliing  wiring colors  and...