BMW 1989-1995 525i Service Manual page 196

130-28
FUEL INJECTION-DME
Table h. ECM Pin Assignment-DME 3.3.1 (continued)
Pin Signal
I
Compo nentlfunctlon
Signal
-
I
•
44 ground Ground
Ground for intake air temp. sensor. engine coolant lemp. sensor. throttle
position sens or
-
-
- -
-
45 gro und Ignition circuit
Grou nd for ignition circuit monitoring
46 output Fuel consumption (KVA signal) Fuel cons umption output to instrument cluster
- -
47 output Engine speed (TO) Engine speed (T O) signal 10 instrument cluster
48 output
N C compressor control N C compressor disable via N C compressor relay
-
-
49 vacant
-
-
50 output Ignition coil control. cyl. 1
Primary signal . ignition coil 1
-
-
51 output Ignition coil control. cyl. 2 Primary signal . ignilion coil 2
- - -
-
52 output Ignition coil control, cyl. 3 Primary signal . ignition coil 3
-
53 vacant
-
-
-
54 input Power supply Battery voltage from main relay (terminal 87)
-
55 ground Ground
Grou nd for ignition control
- - -
-
56 input Power supply (terminal 15)
I
Battery voltage with key on or engine runn ing
--- -
I
from NT control modu le (only active during gearshift) 57 input Ignition timing intervention
- - -
58
vacant
-
1 -
-
59 output Throllie position sensor (T PS)
I
Voltage supply to TPS (5 VDC)
•
60 input Programm ing voltage
I
Programming voltage via data link connector
-
61 vacant
-
1 -
- - - -
62 output
Throttle position signal I to Slip control module
--
63
vacant
- -
-
64 input
N C
on signal from integrated climate control mod ule
-
65 I input
NC
compressor signal from integrated climate control modu le via
N C
pressure switch
-
'Drive.away protection enable
66
I
input On-boa rd co mputer
-
67 vacant
1 -
-
-
68 vacant
1 -
-
-
.
69
I
input
I
Knock sensor #2 (cyl. 4.5.6) Knock sensor #2 signal
i
input
-
70 Knock sensor #1 (cyl. 1.2.3) Knock sensor #1 signal
-
_.
71
ground
t
Ground
Ground for analog signals and knock sensors
1 -
72 vaca nt
I
- -
-
73 input
I
Tnronle position sensor (TPS) Throttle position signal
- -
74 vacant
-
-
-
75
vacant
-
-
76 vacant
-
-
-
- - -
77 Input Intake air temperature sensor Intake air temperature signa l (0· 5 VDC. temperature dependant)
-
78 input Engine coo lant temperature sensor Engine coo lant temperature signal (0·5 VDC. temperatu re dependant )
--
79 vacant
-
-
- -
80 vacant
- -
-
- -
81 input Automatic transmission (NT) range switch NT park or neutral position signal
82 input Electronic throttle control (angl e decrease)
I
from Slip control module
83 Input Electronic thronte control (angle increase)
I
from Slip control mod ule
-
- -
84 vacant
-
1 -
- -
.-
--
85
vacant
-
I -
.
-
86 vacant
-
-
87 input Diagnost ic connecto r (RxD)
I
Diagnostic RxD (receive) signal to pin 15 in Data link connector
88
I
inputloutput
Diagnostic connector (TxD)
I
Diagnostic TxD (transmit) signal to pin 20 in Data link connector
ECM PIN ASSIGNMENTS