BMW 1992 525i Electrical Troubleshooting Manual page 107

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DIGITAL ENGINE ELECTRONICS (DME 1.3, 6-CYLINDER M30 WITH EML)
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Pin Type Description/Function
Connection
Type of Signal Tester Display Measurement Notes
29 Not used
30 Not used
31 E
Cylinder Identification sensor Cylinder Identification sensor
ON/OFF See status monitoring
(ignition) (connection A)
32
A
tl Measuring signal (IWA signal) Instrument cluster Square wave Multimeter function pulse Oscilloscope
signal duration
33 Not used
34 Not used
35 Not used
36 A DME main relay DME main relay terminal 85 Ground ON Diagnosis not possible
11 not fitted, connect
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jumper at relay
"' .....
terminal 30 and 87
C)
.
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37 E U-Batt from Main relay terminal 87 U-Batt Voltage value Perform status monitoring. I
n
OME main relay Diagnosis not possible If
signal not applied.
Connect jumper terminal
30 and 87 on relay
38 E Drive away protection On-board computer
>
10V
39 E Programming voltage Diagnostic connector Only activated for control
unit programming
40
Not used
41 E Auxiliary fan signal EML control unit 12V ON/OFF
42 E Drive range P/N Transmission selector lever Ground
ON
When position P/N
switch
43
Not used
44 E Intake air temperature
Air quantity meter 0 ... 5V
oc
Temperature dependent
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co
co
N