sensor RENAULT TWINGO 2009 2.G Electrical Equipment - Wipers, Washers Workshop Manual

85A-7
MR-413-X44-85A000$200_eng.mif
V1
85A
WIPERS - WASHERS
Fault finding - List and location of components
1UCH
2Passenger compartment fuse and relay box
3Combined wiper-washer
4Windscreen wiper motor
5Rear screen wiper motor
6Front and rear screen washer pump
7Light and rain sensor
8Exterior temperature sensorENGINE HARNESS
FRONT ENGINE HARNESS & PROJADD
DOOR WIRING
CEILING WIRING
PASSENGER COMPARTMENT WIRING
REAR BUMPER WIRING
TAILGATE WIRING
0000000033
MR-413-X44-85A000$200_eng.mif

85A-8
MR-413-X44-85A000$300_eng.mif
V1
85A
WIPERS - WASHERS
Fault finding - Operating diagram
List of components and associated component codes:
Component code Component
1016 Passenger compartment fuse box
645 UCH
247 Instrument panel
677 Washer pump
145 Combined wiper-washer
212 Windscreen wiper motor
1415 Light / rain sensor
211 Rear screen wiper motor
MR-413-X44-85A000$300_eng.mif

85A-9
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WIPERS - WASHERS
Fault finding - Operating diagram85A
Simple windscreen wiper diagram (without rain sensor):
Windscreen wiper diagram with rain sensor:

85A-11
MR-413-X44-85A000$300_eng.mif
V1
WIPERS - WASHERS
Fault finding - Operating diagram85A
The vehicle has an automatic wiper function. To activate this function, place the combined wiper-washer in the
intermittent position.
If the car is put into reverse gear when the front wiper motor is in operation, the UCH commands operation of the rear
wiper.
The UCH controls the power supply to the wiper function. It controls the operation of the front wipers, the wiping
speed (intermittent, low-speed, high-speed) and the bi-directional front and rear screen wash pump.
The rain sensor requires an exterior temperature signal, as this enables activation of the wipers to be avoided at
temperatures which might have frozen the wipers.
Summary of the operation of the rain and light sensor
Steering column control,Rain and light sensor
...Interpretation of driver demands...Interpretation of the amount of rain
Front/rear washer pumpUCH
...Windscreen and rear screen
washing...Front and rear wiper management
...Operation management
Multiplex connections
Wire connections
Serial connections

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WIPERS - WASHERS
Fault finding - Function
The wiper function is divided into two sub-functions: Wiper command, Wiper power.
1. Wiper command
a) By the driver
The UCH receives the request from the driver using the steering column controls.
The UCH orders rear wiping when reverse gear is engaged, if the front wipers are active.
The steering column control supplies power directly to the front/rear washer pump.
The wiper intermittent speed ring allows the intermittent front wiping frequency to be altered.
b) By the rain sensor
The rain and light sensor is a single and unique sensor fitted in the windscreen. It is connected by a serial
connection to the UCH.
The rain sensor enables the wipers to be started automatically. It determines the wiping speed according to various
parameters (exterior temperature, vehicle speed, amount of rain, tunnel, night etc), and it informs the UCH, which
carries out the wiping command.
It is possible to view the status of the sensor using status ET114 "Wiper request by rain sensor".
The sensor configuration can be viewed by reading configuration LC044 "Rain/light sensor" and altered using
command CF035 "Rain/light sensor".
Configuration of the automatic headlight function is carried out using CF193 "Automatic headlight function". This
function can be viewed using LC095 "Automatic headlight function". The configuration CF194 "Automatic
headlight function" is also linked to activation of the headlight function. This function can be viewed using LC096
"Automatic headlight function".
2. Wiper power
The UCH controls the power supply to the wiper motors.
The operation of the rear screen wiper motor may be checked using command AC007 "Rear screen wiper" in the
UCH.
The correct functioning of the front wiper motor is checked using commands AC056 "Low speed wiper", AC057
"High speed wiper" and AC058 "Intermittent wiper" in the UCH.
MR-413-X44-85A000$400_eng.mif

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-14
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WIPERS - WASHERS
Fault finding - configuration and programming
Configurations of the wiper function in the UCH
Individual configuration available on the diagnostic tool with reading of the relevant configuration. Equipment required
Diagnostic toolClip
ConfigurationConfiguration
readingName of configuration Option
CF029 LC002External temperature sensor WITH/WITHOUT
CF193 LC095Automatic headlight functionWITH/WITHOUT
CF194 LC096Automatic wiper function WITH/WITHOUT
CF035 LC044Rain/light sensor WITH/WITHOUT
CF191 LC094Wiper intermittent speed ring WITH/WITHOUT
MR-413-X44-85A000$600_eng.mif

85A-15
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85A
WIPERS - WASHERS
Fault finding - Conformity check
SUB-FUNCTION: WIPING CONTROL
NOTESOnly carry out this conformity check after a complete check with the diagnostic tool
(fault reading and configuration checks).
Application condition: engine stopped, + after ignition feed present.
Computer Order FunctionParameter or Status
checked or ActionDisplay and
NotesFault finding
UCH
(see 87B,
passenger
compartment
connection
unit)1
Wiper
controlET077:Wiper stalk
positionINACTIVE
INTERMITTENT
LOW-SPEED
HIGH SPEEDIn the event of a fault, apply
the interpretation of status
ET077 (see 87B, UCH).
2ET096:Wiper
intermittent
speed ring
position1
2
3
4
5In the event of a fault, apply
the interpretation of status
ET096 (see 87B, UCH).
3ET114:Windscreen
wiper request
by rain sensorABSENT
LOW-SPEED
HIGH SPEEDIn the event of a fault, apply
the interpretation of status
ET114 (see 87B, UCH).
4
Windscreen
wiper park
positionET078:Windscreen
washer
requestACTIVE
INACTIVEIn the event of a fault, apply
the interpretation of status
ET078 (see 87B, UCH).
5ET027:Windscreen
wiper park
positionACTIVE
INACTIVEIn the event of a fault, apply
the interpretation of status
ET027 (see 87B, UCH).
6
Rear screen
wiper park
positionET079:Rear screen
washer
requestACTIVE
INACTIVEIn the event of a fault, apply
the interpretation of status
ET079 (see 87B, UCH).
7ET097:Rear screen
wiper park
positionACTIVE
INACTIVEIn the event of a fault, apply
the interpretation of fault
ET097 "Windscreen wiper
park position" (see 87B,
UCH).
8ET080:Rear screen
wiper requestACTIVE
INACTIVEIn the event of a fault, apply
the interpretation of status
ET080
9Reverse
gearET109:Reverse gear
engagedYES
NOIn the event of a fault, apply
the interpretation of status
ET109 (see 87B, UCH).
MR-413-X44-85A000$700_eng.mif

85A-20
MR-413-X44-85A000$900_eng.mif
V1
WIPERS - WASHERS
Fault finding - Fault Finding Chart85A
ALP 15 No front wiping following activation of the wiper switch
NOTESOnly refer to the customer complaints after performing a complete check using the
diagnostic tool.
Check in particular the correct functioning of statuses ET077 "Wiper stalk position"
and ET114 "Wiper request by rain sensor", ET027 "Windscreen wiper park
position" and commands AC056 "Low speed wiper" and AC057 "High speed
wiper" in the UCH. Check for fault DF097 "Windscreen wiper park position
circuit".
Perform a multiplex network test if the multiplex network is faulty (see 88B, Multiplexing).
Check that the blades are correctly fitted to the blade holders and that each mounting nut is correctly tightened.
Check that nothing is interfering with the windscreen wiper mechanism operation.
Check that the motor is in good condition.
Check that the mechanism between the motor and the blade is correctly mounted and tightened (see MR411,
85A Wipers-washers).
AFTER REPAIRCarry out a complete check with the diagnostic tool.

85A-23
MR-413-X44-85A000$900_eng.mif
V1
WIPERS - WASHERS
Fault finding - Fault Finding Chart85A
ALP 18 No wiping when it rains
NOTESOnly check this customer complaint after a complete check with the diagnostic tool.
Check in particular the correct functioning of statuses ET077 "Wiper stalk position"
and ET114 "Wiper request by rain sensor" in the UCH.
Note:
If the exterior temperature is below 5 ˚C, automatic wiper action will be blocked, to
avoid damaging the wiper blades if they are frozen.
STEP 1
Place the command in the intermittent position to activate automatic wiping.
If necessary explain to the customer how this function works.
STEP 2
Check whether the vehicle has a rain / light sensor. If the vehicle does not have a rain / light sensor, explain to the
customer that this is normal, and that the vehicle does not have this feature.
Check that the vehicle is configured with a rain / light sensor.
Check that LC044 "Rain/light sensor" displays "Present". If not, carry out CF035 "Rain/light sensor".
Check that LC096 "Automatic wiper function" displays "With". If not, carry out CF194 "Automatic wiper
function".
Check that LC095 "Automatic headlight function", displays "With". If not, carry out CF193 "Automatic
headlight function".
STEP 3
Check that the windscreen is clean and in good condition (no cracks, bonded correctly, etc.).
Check that the sensor is present and correctly positioned.
Check that the windscreen is the correct type.
AFTER REPAIRCarry out a complete check with the diagnostic tool.