BMW 1992 525i Electrical Troubleshooting Manual page 157

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DIGITAL ENGINE ELECTRONICS (DME M3.1, 6-CYLINDER M50)
.... ....
~
Pin
"f\'pe Description/Function
Connection "f\'pe
ot
Signal
Tester Display Measurement Notes
42 Not used
43 M Ground for sensors
Temperature sensor Ground
44
E Cylinder reference signal Cylinder reference sensor A/C voltage Oscilloscope One signal per camshaft
(Ignition) (connection A) revolution
45 Not used
46 Not used
47
Not used
48
A
NC
compressor control Compressor control relay Ground Ground =
>
Compressor
OFF
49 Not used
50 A Ignition terminal 1 Ignition coil 4 Primary signal Oscilloscope Engine test, test
step
05
....
1\)
....
51 A
Ignition terminal1 Ignition coil 6
Primary signal Oscilloscope Engine test, test
step
05
0
52 A
Ignition terminal 1 Ignition coil 5
Primary signal Oscilloscope Engine test, test
step
05
~
I
a.
53 Not used
54
E
>
1 0 V from DME main relay Main relay terminal 87
> 10V Voltage value Perform status monitoring.
Diagnosis not possible
If
signal not applied - con-
nect jumper terminal30
and 87 on relay
55 M
Ground, ignition
Ground point Ground
56 E
Ignition terminal 15
Ignition switch > 10V
57
Not used
58
Not used
59
A Component voltage
Throttle potentiometer 5V
60 E Programming voltage Diagnostic connector
Only activated for control
unit programming
-
t O
tO
1\)
(