BMWAG
Electrical troubleshooting manual
5 Series - E34 (518i, 520i, 525td, 525tds, incl. touring) Schematics Model year 1994

Electronic transmission control (EGS A4S 31 OR)
Scheme 2460.2

Pin Assignment X8500
PinTypeDescription/FunctionConnection
1not used
2EE programProgram button
3not used
4AEngine interventionDME control unit
5not used
6not used
7not used
8EPosition switch L3Selector lever
9EFuel consumption indicator (ti signal)DME control unit
10AE program indicatorInstrument cluster
11EEngine speed n-mot (TR signal)DME control unit
12AM program indicatorInstrument cluster
13E/ATxD diagnosis lineDiagnostic connector
14En-ab (-)EGS speed sensor
15not used
16not used
17MAnalog ground (temp, sensor)Gearshift unit
18AShield speed sensorSpeed sensor
19MPower groundGround connection
20En-ab (+)EGS speed sensor
21EA/C compressorPressure switch
22EOil temperature sensor (+)Gearshift unit
23EPosition switch L1Selector lever
24not used
25ERxD diagnosis lineDiagnostic connector
26EPosition switch L2Selector lever
27not used
28EVoltage supply terminal 30Battery
29AFault indicatorInstrument cluster
30EKick-downKick-down switch
31EM programProgram button
32not used
33EPosition switch L4Selector lever
34ES programProgram button
35not used
36MElectronics groundGround connection
37EVoltage supplyDME relay
38ASolenoid valve, converter clutchGearshift unit
39not used
40APressure regulator (+)Gearshift unit
41APressure regulator (-)Gearshift unit
42not used
43ASolenoid valve 2Gearshift unit
44not used
45ASolenoid valve, bandGearshift unit
46not used
47not used
48ASolenoid valve 1Gearshift unit
49not used
50not used
51not used
52not used
53not used
54MGround, solenoid valvesGearshift unit
55EThrottle-valve signalDME control unit
E = Input, A = Output, M = Ground