BMW 1992 525i Electrical Troubleshooting Manual page 158

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IB&WI
DIGITAL ENGINE ELECTRONICS (DME M3.1, 6-CYLINDER MSO}
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Pin
TYpe
Description/Function
Connection
Type of Signal
Tester Display Measurement Notes
61
Not used
62 Not used
63
Not used
64 E Ignition timing Intervention EGS control unit Ground ON
Only active during gearshift
65 E Drive range P/N Transmission selector lever Ground ON When position P/N
switch
66
Not used
67 E Inductive pulse generator Pulse generator A/C voltage
Engine speed Between Pins
ffT
and
68
{connection B) Engine speed/position (can only be measured
with crankshaft rotating)
68 E Inductive pulse generator Pulse generator AIC voltage Engine speed Between Pins
ffT
and 68
.....
(connection A)
Engine speed/position
(can only be measured
N
.....
with crankshaft rotating)
0
:...,
69
Not used
I
CD
70 E
Oxygen sensor signal Oxygen sensor Pulsating voltage Voltage value Can only be measured
up to approx.
1
V with engine running at
operating temperature
71
M Ground oxygen sensor Oxygen sensor Ground
72
Not used
73 E
Road speed signal Instrument cluster Square wave km/h
Status monitoring
signal
74
Engine speed signal TO Instrument cluster Square wave
One signal per Ignition
signal
75
Not used
76 Not used
n
E
Intake air temperature Intake air temperature sensor
0 ... 5V
oc
Temperature-dependent
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