KdFi Onboard Wideband Controller

Only the LSU4.2 is supoorted by the KdFi boards.

Activating the onboard widebandcontroller is done by jumper soldering or DIP-switching GP2 to GND and WBout to OXY1 & by cable loops on the PnP cable connectors.

  • Bosch LSU 4.2 BLACK
  • Bosch LSU 4.2 YELLOW
  • Bosch LSU 4.2 RED
  • Bosch LSU 4.2 GREY
  • Bosch LSU 4.2 WHITE
  • Bosch LSU 4.2 GREEN 

All cables/solderpads must be connected to have a working/error free lambda controller.

Green LED status(LD12):

  • ON: Lambda Controller is powered and standby
  • Flashing fast: LSU sensor heating up
  • Flashing slow: Lambda Controller normal operational

Red LED status(LD11):

  • ON: Error detected
  • Flashing: Error detected
Common Tunerstudio Settings:

  • Emulated Controller PLX
  • Signal 0-5V = AFR10-AFR20

Never ever leave LSU sensors electrically unconnected in the exhaust, thermoshock and condensation will kill sensors!
Only 1x LSU4.2 sensor can be connected to the onboard (any) wideband controller.

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