BMW 1989-1995 525i Service Manual page 190

130-22
FUEL INJECTION-DME
Table e. ECM Pin Assignment-DME 1.3 (continued)
Pin Signal Componentlfuncllon Signal
IOata link connector
39
input
I
Progra mming voltage
40 input AlC compr essor on AlC refrigerant pressure switch and compressor clutch
(vacant on 535i model with EM L)
41
I
Input
AlC on
I
Auxiliary fan on signal (via EML control modu le on 535i w/EML )
42
I input
Automatic transm ission (Aff) range switch
I
Aff park or neutra l position signal
43 vacant
I- I-
44 Intake air temperature Intake air temperature via volume air flow sensor (0-5 V, temperat ure
dependant)
45 input Engine temperature
I
Engine coolant temperatu re (0-5 V, temperature dependant)
I
(Intake air temperature on 535i w/EML ) (Intake air temperature sensor on 535i w/EML )
46
I
vacant
1 -
-
47
input
Engine speed and crankshaft position Cranks haft position/rpm (voltage (VAC) between pins 47 and 48)
senso r
48 input Engine speed and crankshaft position
I
Crankshaft position/rpm (voltage (VAC) between pins 47 and 48)
sensor
49 vacant
,
-
-
(input on (Engine torque reductionrcutout on 5351
(from Slip control modul e on 535i wiEML)
535i w/EML) wIEML)
50
I
vacant
-
1 -
51
I
input
Ignition timing intervention
I
from Auto matic trans mission control module
52
I
input
I
Throttle position
Ground with throttle in idle position via throttle position switch (via EML
control module on 535i wIEM L)
53
input
I
Throttle position
I
Ground with throttle in full open position via throttle position switch (via
EML control module on 535i w/EML)
54 input Torque converter clutch WK Automatic transmission control module
55
I
inpuVoutput
I
Diagno stic connector (TxD) Diagnostic TxD (transmit) and RxD (receive) signal to/from pin 20 in Data
link connector
I
ECM PIN ASSIGNMENTS