X21 Engine plug III

Plug connector overview

NumberX-pin, colourDescription
X2118-pin, BlackMotor connector III

Pin assignments at plug connector X21

Pin Description  B: Socket housing
S: Pin housing
1 Not usedB:
  S:
2 Not usedB:
  S:
3 Not usedB:
  S:
4 Not usedB:
  S:
5 Gear indicator signalB: Integrated electronic control unit (IKE)
  S: AGS transmission control unit
6 Solenoid valves +B: Shift lock selector lever lock
  S: AGS transmission control unit
7 Solenoid valvesB: Shift lock selector lever lock
  S: AGS transmission control unit
8 Not usedB:
  S:
9 Transmission influencing signalB: Cruise control module
  S: AGS transmission control unit
10 Steptronic signal, upshiftB: Steptronic switch
  S: AGS transmission control unit
11 Steptronic signal, backB: Steptronic switch
  S: AGS transmission control unit
12 Signal, gearshift position L2B: Electronic immobilizer control unit (EWS)
  S: AGS transmission control unit
13 Signal, lights switch panelB: Gear indicator light
  S: AGS transmission control unit
14 Not usedB:
  S:
15 Signal, gearshift position L5B: Program switch
  S: AGS transmission control unit
16 Signal, gearshift position L6B: Program switch
  S: AGS transmission control unit
17 Not usedB:
  S:
18 Kick-down switch signalB: Kick-down switch
  S: AGS transmission control unit