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

85A-5
MR-413-X44-85A000$100_eng.mif
V1
WIPERS - WASHERS
Fault finding - Introduction85A
4. FAULT FINDING PROCEDURE (CONTINUED)
Wiring check
Fault finding problems
Disconnecting the connectors and/or manipulating the wiring harness may temporarily remove the cause of a fault.
Electrical measurements of voltage, resistance and insulation are generally correct, especially if the fault is not
present when the analysis is made (stored fault).
Visual inspection
Look for damage under the bonnet and in the passenger compartment.
Carefully check the fuses, insulators and wiring harness routing.
Look for signs of oxidation.
Tactile inspection
While manipulating the wiring harness, use the diagnostic tool to note any change in fault status from stored to
present.
Make sure that the connectors are properly locked.
Apply light pressure to the connectors.
Twist the wiring harness.
If there is a change in status, try to locate the source of the fault.
Inspection of each component
Disconnect the connectors and check the appearance of the clips and tabs, as well as the crimping (no crimping on
the insulating section).
Make sure that the clips and tabs are properly locked in the sockets.
Check that no clips or tabs have been dislodged during connection.
Check the clip contact pressure using an appropriate model of tab.
Resistance check
Check the continuity of entire lines, then section by section.
Look for a short circuit to earth, to + 12 V or to another wire.
If a fault is detected, repair or replace the wiring harness.

85A-7
MR-413-X44-85A000$200_eng.mif
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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

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MR-413-X44-85A000$300_eng.mif
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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-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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MR-413-X44-85A000$400_eng.mif
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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-14
MR-413-X44-85A000$600_eng.mif
V1
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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-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.

85A-24
MR-413-X44-85A000$900_eng.mif
V1
WIPERS - WASHERS
Fault finding - Fault Finding Chart85A
ALP 19No change in wiper speed after activating the wiper intermittent
speed ring
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:
In order for intermittent wiping to function, the ignition must be on and the wiper
intermittent speed ring should be at least in position "1". With each change of position
for the wiper intermittent speed ring, the windscreen wiper blades should carry out
one movement.
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
Check that the vehicle is fitted with a wiper intermittent speed ring.
Check that LC094 "Wiper intermittent speed ring" displays "With". If not, carry out CF191 "Wiper intermittent
speed ring".
If CF191 "Wiper intermittent speed ring" displays "With", check in the ICM application (Shared World
Information) that the vehicle does indeed have this fitted.
STEP 2
Ensure the correct functioning of status ET077 "Wiper stalk position". In the event of a fault consult status
interpretation ET077 "W iper stalk position".
Ensure the correct functioning of status ET096 "Wiper intermittent position". In the event of a fault consult
status interpretation ET096 "Wiper intermittent position".
Ensure that the park position is not presenting a fault (DF097 "Windscreen wiper park position").
STEP 3
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".
AFTER REPAIRCarry out a complete check with the diagnostic tool.