Diagnosis Item 11: Diagnose when the M.U.T.-III cannot receive the data sent by headlamp automatic levelling-ECU <vehicles with headlamp automatic levelling system>


caution When servicing a CAN bus line, earth yourself by touching a metal object such as an unpainted water pipe. If you fail to do, a component connected to the CAN bus line may be broken.

FUNCTION



TROUBLE JUDGEMENT CONDITIONS



TROUBLESHOOTING HINTS



  • Malfunction of the connector [joint connector (CAN3) or headlamp automatic levelling-ECU improperly connected]
  • Malfunction of the wiring harness [open circuit between the headlamp automatic levelling-ECU and the joint connector (CAN3), power supply circuit to the headlamp automatic levelling-ECU]
  • Malfunction of the headlamp automatic levelling-ECU