Page 9 of 29

85A-9V1 MR-376-X76-85A000$040.mif
WIPERS - WASHERS
Fault finding – Function85A
UCH
Vdiag No.: 0F
Rear screen washing/wiping
The UCH controls a diode relay which is external to the UCH, by transmitting a + 12 V signal.
The drop in the voltage between the UCH supply voltage and this output should not exceed 2 V.
The UCH receives the intermittent wiper speed, rear wiper park and rear screen washer signals.
This ensures the following functions:
– intermittent wiper speed,
– extended wiper time after washing,
– return to park position.
In the park position, the switch is closed to earth, and the UCH receives logical signal 0.
This function is only active if + after ignition feed is present.
When the + after ignition feed is switched on, if the rear wiper park position is not detected, the wiper motor relay is
held.
Operation is interrupted in the following cases:
– wiper request stopped or no request,
–+ after ignition feed switched off,
– UCH reads park position information.
Detection of the park position should be made during transition and not level, that is, if the wiper stalk is moved from
the intermittent position to the park position while the wiper blade is in the park position and the wiper motor is
running, it will not be stopped until the next reading of the park position. This condition is necessary in order to obtain
an exact park position.
Intermittent
The intermittent wiper speed function is only active if the + after ignition is present and if the switch is in the
intermittent position.
The time delay between two wipes is 5 seconds, and this cannot be modified by the diagnostic tool.
When the rear intermittent speed function is activated, the rear intermittent speed relay is held by the UCH until the
park position is detected. When the intermittent speed time delay has elapsed, the relay is held again and the cycle
begins again.
Extended wiper time after washing
The UCH does not manage the rear washer pump command.
It only deals with the rear screen washer command input to provide wiping and extended wiping after washing.
This function is only active if + after ignition feed is present.
After the washer pump is activated, the first wiping is performed after a time delay of 750 ms.
Page 10 of 29
85A-10V1 MR-376-X76-85A000$040.mif
WIPERS - WASHERS
Fault finding – Function85A
UCH
Vdiag No.: 0F
Heated rear screen time delay
This output controls a diode relay which is external to the UCH, delivering the power to supply the heated rear
screen.
The de-icing time delay is activated by pressing the heated rear screen button located on the central console front
panel.
The heated rear screen time delay is deactivated:
– by pressing the button again if the time delay between activation and deactivation is less than 50 seconds,
– automatically if the time delay has elapsed,
– directly if there is a cut in the + after ignition feed or engine speed signal.
The minimum time delay between two presses of the button so that the command is taken into account, should not
be less than 200 ms.
Page 11 of 29
85A-11V1 MR-376-X76-85A000$050.mif
85A
UCH
Vdiag No.: 0F
Wiper function configurations in the UCH
Configuration readings and configuration available on the diagnostic tool: Equipment required:
CLIP diagnostic tool
Configuration
readingName of configuration Option Configuration
LC064 Rear screen wiper WITH or WITHOUT SC008 UCH type
WIPERS - WASHERS
Fault finding – Configuration
Page 12 of 29
85A-12V1 MR-376-X76-85A000$060.mif
85A
UCH
Vdiag No.: 0F
Tool fault Diagnostic tool title
DF040Rear screen wiper park position
DF097Windscreen wiper park position control
WIPERS - WASHERS
Fault finding – Fault summary table
Page 13 of 29

85A-13
AFTER REPAIRFollow the instructions.
Deal with any other faults.
Clear the stored faults.
V1 MR-376-X76-85A000$070.mif
85A
UCH
Vdiag No.: 0F
DF040
PRESENT
OR
STOREDREAR SCREEN WIPER PARK POSITION
NOTESThe fault is declared present following operation of the rear screen wiper.
Special notes: random operation of screen wiping in intermittent speed position (time
delay not respected).
Special Note:
Use Wiring Diagrams Technical Note for Kangoo VLL.
Check that the rear screen park position status ET097 Rear screen park position is ACTIVE each time the wiper
blade arrives at the park position and then changes back to INACTIVE.
Check the connection and condition of the connectors of the UCH, component code 645, of the passenger
compartment fuse and relay box, component code 260, of the rear screen wiper relay, component code 1041, of
the rear screen wiper motor, component code 21 and of the wiper stalk, component code 145.
If the connector(s) are faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Check the insulation, continuity and the absence of interference resistance on the following connections:
•AP7 between components 1041 and 260,
•36A between components 1041 and 645,
•36G of component 1041 and 36A of component 211,
•NA between component 1041 and earth,
•36C of component 645 and AP3 of component 211,
•MG between component 211 and earth.
If the connection or connections are faulty and if there is a repair procedure (see Technical Note 6015A,
Electrical wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
Check the connection and condition of the rear screen wiper motor connector, component code 211.
If the connector is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Check the operation and fitting of the rear screen wiper motor.
The rear screen wiper motor may need to be replaced (see MR 374 Mechanical, 85A, Wiping - Washing, Rear
screen wiper motor: Removal - Refitting).
If the fault is still present, contact the Techline.
UCH_V0F_DF040
WIPERS - WASHERS
Fault finding – Interpretation of faults
Page 14 of 29

85A-14
AFTER REPAIRFollow the instructions.
Deal with any other faults.
Clear the stored faults.
V1 MR-376-X76-85A000$070.mif
WIPERS - WASHERS
Fault finding – Interpretation of faults85A
UCH
Vdiag No.: 0F
DF097
PRESENT
OR
STOREDWINDSCREEN WIPER PARK POSITION
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present following operation of the windscreen wiper.
Special notes: random operation of the wipers in intermittent speed position (time
delay not respected).
Special Note:
Use Wiring Diagrams Technical Note for Kangoo VLL.
Check that the windscreen park position status ET027 Windscreen park position is ACTIVE each time the wiper
blade arrives at the park position and then changes back to INACTIVE.
Check the connection and condition of the connectors of the UCH, component code 645, of the combined wiper-
washer, component code 145 and of the windscreen wiper motor, component code 212.
If the connector(s) are faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Check the insulation, continuity and the absence of interference resistance of the following connections:
•14L between components 645 and 212,
•AP7 between components 145 and 212,
•MQ between component 212 and earth,
•14C between components 145 and 645,
•14D between components 145 and 645.
If the connection or connections are faulty and if there is a repair procedure (see Technical Note 6015A,
Electrical wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
Check the connection and condition of the windscreen wiper motor connector, component code 212.
If the connector is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Check the operation and fitting of the windscreen wiper motor.
The windscreen wiper motor may need to be replaced (see MR 374 Mechanical, 85A, Wiping - Washing,
Windscreen wiper motor: Removal - Refitting).
If the fault is still present, contact the Techline.
UCH_V0F_DF097
Page 15 of 29

85A-15V1 MR-376-X76-85A000$080.mif
85A
UCH
Vdiag No.: 0F
NOTESOnly perform this conformity check after a complete check with the diagnostic tool.
The values indicated in this conformity check are given as examples.
Test conditions: Engine stopped, ignition on.
FunctionParameter or status
Checked or actionDisplay
and notesFault finding
Windscreen
wiperET027:Windscreen wiper
park positionActive when the wiper
control is in the
intermittent speed
position at each wiper
stop.In the event of a fault,
apply the interpretation of
the fault DF097
Windscreen wiper park
position.
ET097:Rear screen wiper
park positionActive when the wiper
control is in the
intermittent speed
position at each wiper
stop.In the event of a fault,
apply the interpretation of
fault DF040 Rear screen
wiper park position.
ET558:Windscreen wiper
speed setting
selectionYes when the wiper
control is in the
intermittent speed
position.In the event of a fault,
apply the interpretation of
status ET558.
ET555:Rear screen wiper
signalPresent during the rear
screen wiper command.In the event of a fault,
apply the interpretation of
status ET555
Windscreen
washerET492:Windscreen
washer signalPresent during the
windscreen washer/wiper
command.In the event of a fault,
apply the interpretation of
status ET492
ET557:Rear screen
washer signalPresent during the rear
screen washer/wiper
command.In the event of a fault,
apply the interpretation of
status ET557
UCH_V0F_CCONF
WIPERS - WASHERS
Fault finding – Conformity check
Page 16 of 29
85A-16V1 MR-376-X76-85A000$090.mif
85A
UCH
Vdiag No.: 0F
Tool status Diagnostic tool title
ET027Windscreen wiper park position
ET097Rear screen wiper park position
ET492Windscreen washer signal
ET555Rear screen wiper signal
ET557Rear screen washer signal
ET558Windscreen wiper speed setting selection
WIPERS - WASHERS
Fault finding – Status summary table