1999 BMW 540i Speed

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Page 451 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
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Fuel Injection 
I 68 1 / Not used 
Table 
d. Bosch 
M5.2 ECM pin assignments 
I  I I 
69 1 input I AIC system standby signal (> 10 V) 1

Page 454 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
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Fuel Injection 
Table e. Bosch 5.2.1 ECM pin assignments 
Pin 
I~iqnal 1 Description 1 Note 
I  I I 
46 llnput ICrankshaft position sensor

Page 457 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
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 c

Page 458 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
130-68 
Fuel Injection 
0 
4 The ME 7.2 uses  a non-return  fuel rail. The fuel pressure  reg- 
ulator is  integrated  into the fuel  filter.

Page 459 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
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Fuel Injection I 
The PWG  potentiometers provide DC voltage  signals as in- 
put to the  ME 7.2 control  module for throttle and idle  co

Page 465 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
130-75 
Fuel Injection 
Secondary air injection,  overview 
The secondary air  system pumps  ambient air into  the exhaust 
stream  afteracoid

Page 469 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
Fuel Injection I 
Connector X60004 (continued) 
8 10 
11 
12 
13 
14 
15 
16 
9 
Output 0 
Input 
17 
18 
19 
20 
21 
22 
23 
24 
25 
26 
27

Page 500 of 1002

BMW 540i 1999 E39 Workshop Manual Downloaded from www.Manualslib.com manuals search engine 
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I Radiator and Cooling  System 
Mechanical thermostat 
(M52 engine) 
4 The mechanical  thermostat relies on coolant temperature  to 
operat