85A-13
MR-413-X44-85A000$500_eng.mif
V1
85A
WIPERS - WASHERS
Fault finding - Role of components
Rain sensor:
The role of the rain sensor is to activate the wiper motor automatically when it detects rain.
Windscreen wiper motor:
The role of the windscreen wiper motor is to provide windscreen cleaning.
Rear screen wiper motor:
The role of the rear screen wiper motor is to provide rear screen cleaning.
Combined wiper-washer:
The role of the combined wiper-washer is to control the different washing and wiping functions.
External temperature sensor:
The role of the exterior temperature sensor is to provide the rain sensor with the exterior temperature, so that the
rain sensor will not activate the wipers if the wiper arms are frozen to the windscreen.
Front and rear screen wash pump:
The role of the front and rear screen wash pump is to send screen wash fluid to the windscreen and rear screen.
Wiper intermittent speed ring:
The wiper intermittent speed ring allows the intermittent front wiping frequency to be altered.
UCH:
The UCH enables all wiper operations to be managed (triggering, intermittent function etc).
MR-413-X44-85A000$500_eng.mif
85A-22
MR-413-X44-85A000$900_eng.mif
V1
WIPERS - WASHERS
Fault finding - Fault Finding Chart85A
ALP 17 No front and rear screen washer
NOTESOnly check this customer complaint after a complete check with the diagnostic tool.
Check in particular the correct functioning of statuses ET078 "Front washer
request" and ET079 "Rear washer request" in the UCH.
The reservoir containing the washer fluid?
YES
Does the pump run when its control is activated?
YES
Check the condition of the pipes and jets.
Are they in good condition?
YES
Are the jets correctly adjusted?
YES
End of fault finding.
NOPut some washer fluid in the reservoir.
NOPower the pump directly to check it is
functioning correctly.
Replace the pump if it does not work.
NOCarry out the necessary repairs and clean the
jets.
NOAdjust the jets.
AFTER REPAIRCarry out a complete check with the diagnostic tool.
