X21 Engine plug III

Connector overview

NumberX-pin, colorDescription
X2118-pin, blackEngine connector III

Pin assignments at connector X21

PinTypeDescription / Signal typeConnection /
Measuring notes
1 Not used 
   
2 Not used 
   
3 LH rear engine speed signalB: Engine control module II (DME)
   
4 Not used 
   
5 Transmission position indicator signalB: Transmission control module (AGS)
   
6 Transmission range switch lock signal (positive)B: Transmission control module (AGS)
   
7 Transmission range switch lock signal (negative)B: Transmission control module (AGS)
   
8 up to 1995_08 ASC passive signal as of 1995_09 Not usedB: Transmission control module (AGS)
   
9 Not used 
   
10 Steptronic signalB: Transmission control module (AGS)
   
11 Steptronic signalB: Transmission control module (AGS)
   
12 Transmission range switch position L2 signalB: Splice signal L2
   
13 Illumination switch panel signalB: Transmission control module (AGS)
   
14 Not used 
   
15 Transmission range switch position L5 signalB: Transmission control module (AGS)
   
16 Transmission range switch position L6 signalB: Transmission control module (AGS)
   
17 Not used 
   
18 Kick-down signalB: Throttle position control module (EML)