BMW 1992 525i Electrical Troubleshooting Manual page 203

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ELECTRONIC TRANSMISSION CONTROL (EGS A4S 310R) ... ...
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Pin Assignments
X8500
Pin Type Description/Function Connection Type of Signal Tester Display Measurement Notes
1 A Shift lock solenoid control Shift lock solenoid
2
E Automatic mode signal
Program switch
Ground
3 Not used
4 A Ignition timing intervention DME control unit Ground Active only during gear
shifts
1\)
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5 Not used
en
0
.
6 Not used
1\)
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7 Not used
Dt
8 E Gear range signal L3 Auto. trans. range switch
9 E t1 Measuring signal (KVA) DME control unit Square-wave Multlmeter function
Oscilloscope
signal pulse duration
10 A Automatic mode indicator Instrument cluster
11
E Engine speed signal (TR}
OME control unit
Ground with
Can only be measured
superimposed with crankshaft rotating
signal
12 A Manual mode indicator
Instrument cluster
13
E/A Diagnosis TxD
Diagnostic socket
14
E
Transmission output
EGS RPM sensor
shaft speed (-)
15
E Switch test signal
Brake llght test switch
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