BMW 5251 Service Manual page 411

Fuel lniection
1
Table b. Siemens MS 41.1 ECM pin assignments (continued)
Pin lSiqnal
1
Componentlfunction
/
Notes
I
-
I
I
40
1
ground /Crankshaft position sensor /crankshaft position sensor control
I
-
I
I
41
1
ground /Camshaft position sensor (CMP) /shielding for CMP sensor
I
-
I
I
42
1
ground I~hrottie position sensor (TPS) /TPS ground
43
44
45
46
47
48
49
50
51
ground
output
output
output
outout
I I I
input
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
Camshaft position sensor (CMP)
Throttle position sensor (TPS)
Throttle position sensor (traction control)
Instrument cluster
Not used
Crankshaft position sensor (Hall effect)
I ~ o t used
I I
I
Fuel pump relay control
Camshaft positionlrpm sensor control
Voltage supply to TPS (5 vdc)
ABSIASC module
Instrument cluster, fuel reserve signal
Crankshaft position sensor control
Power supply (terminal 15)
Not used
Not used
output
input
ground
ground
output
input
output
inputloutput
ground
output
input
input
input
I
I
Battery voltage with key on or engine running
Oxygen sensor signal ground 67
Idle speed control valve
Power supply
Oxygen sensor heater (no. 2 in front catalytic
converter)
Ignition circuit
Knock sensor (cyl. 1-3)
Knock sensor (cyl. 1-3)
Knock sensor (cyl4-6)
Data linic connector (TxD)
Oxygen sensor heater (no. 2 behind catalytic
converter)
Secondary air injection
Knock sensor (cyl. 4-6)
Camshaft positionlrpm sensor
Camshaft positionlrpm sensor
Not used
Pulse ground with engine at normal temperature with
varying engine load
68
Pulsed ground-close signal (see pin 26)
Battery voltage from main relay (terminal 87)
Oxygen sensor heater ground
Ignition circuit monitoring signal
Knock sensor
Knock sensor signal
Knock sensor
Diagnostic TxD (transmit) signal to pin 18 in data link
connector
Oxygen sensor heater ground
Secondary air injection control valve
Knocic sensor signal
Camshaft positionlrpm sensor control
Camshaft positionlrpm sensor control
ground Oxygen sensor (no. 1 in front of catalytic
converter)
output Evaporative purge valve control