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• P1915

  P1915

  
  

  Diagnosis information - DME V6 DFI Driver of auxiliary water pump relay

  NOTE: If the control unit connector B is disconnected from the DFI during fault finding or if the power supply is interrupted elsewhere (battery, fuse), teaching of the throttle valve adjusting unit must be performed.

  
  

  NOTE: If the ignition is switched on with the connector [B] disconnected from the DFI control unit, the fault >DFI control unit TIMEOUT< can be entered.

  
  

  Diagnostic conditions

• Battery positive voltage between > 10 V and 16 V
• Time after engine starts > 10 seconds
  
  

  Possible fault causes

• Short circuit to B+
• Short circuit to ground
• Open circuit in line
• Fuse F10 faulty (fuse carrier in plenum panel E-box)
• Auxiliary water pump relay faulty
  
  

  Affected contacts on the DFI control unit connector

  
  
  Connector [B]:
• Contact 33
  
  

  Affected contacts on the auxiliary water pump relay

• Contact 85
• Contact 86