BMW 1992 525i Electrical Troubleshooting Manual page 105

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DIGITAL ENGINE ELECTRONics (DME 1.3, 6-CVLINDER M30 WITH EML)
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Pin Assignments
X6000
Pin Type Description/Function Connection '1\'pe of Signal
Tester Display Measurement Notes
1 A Ignition terminal Ignition coil Primary signal Oscilloscope Engine test, test step 05
2 M Ground Ground point Ground
3 A EKP relay and
TR
signal EKP relay and Ground with Can only be measered
(crankshaft reference) electronic transmission superimposed ON when crankshaft rotating
control unit signal
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4 Not used
N
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0
5 A Evaporative valve Evaporative valve Pulsed ground CLOSED/OPEN Perform component
.
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activation, ground
=
>
'
m
closed
6 A Engine speed signal
Instrument cluster
Square wave One signal per Ignition
signal
7 E Air flow meter signal Air flow meter
o ... sv
Load signal ms See status monitoring
8 E Cylinder identification
Cylinder Identification ON/OFF
See status monitoring
sensor (Ignition) sensor (connection B)
9 Not used
10
M
Ground, oxygen sensor
Oxygen sensor
Ground
11 Not used
12 A Voltage supply, air flow meter
Air flow meter
-5V
13 E RxD
diagnostic data line
Diagnostic connector
>
10V When cover of diagnostic
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connector closed
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