
PARKING DISTANCE CONTROL
Fault finding - Interpretation of faults
87F
87F - 22V2 MR-413-X44-87F000$462_eng.mif
Vdiag No.: 04 08
DF006
PRESENT
OR
STOREDBUZZER
CC.1 : Short circuit to + 12 V
CO.0 : Open circuit or short circuit to earth
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present following selection of reverse gear if the parking proximity
sensor function is ACTIVE (READY): the parking proximity sensor warning light is not
lit, see the interpretation of status ET003 Parking proximity sensor function.
Special notes:
The fault is indicated by the absence of the 1-second beep normally emitted by the
buzzer when reverse gear is selected.
Check for possible damage to the wiring harness, check the condition and connection of the parking distance
control computer and the buzzer connectors (bent, oxidised or broken tabs).
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Switch off the ignition and disconnect the 16 track connector from computer component code 1222.
Measure the internal resistance of the computer between the following connections:
●Connection code 151R.
●Connection code 151S
Between components 1222 and 1223.
If the measured value is not 314 ΩΩ Ω Ω
± 10 ΩΩ Ω Ω
or if there is a short circuit on the specified connections, contact Techline.
Switch off the ignition, and disconnect the parking distance control computer to check the insulation, continuity
and the absence of interference resistance on the following connections:
●Connection code 151R,
●Connection code 151S.
Between components 1222 and 1223.
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 or replace it.
Measure the resistance value of component 1223 between the following connections:
Measure the resistance between the following connections:
●Connection code 151R,
●Connection code 151S.
Replace the buzzer if its resistance value is not approximately 48 ΩΩ Ω Ω
± 5 ΩΩ Ω Ω
.
If the fault is still present, replace the buzzer.
AFTER REPAIRClear the stored faults.
Follow the instructions to confirm repair.
Deal with any other faults.
AAP_V04_DEF006/AAP_V08_DEF006

PARKING DISTANCE CONTROL
Fault finding - Conformity check
87F
87F - 27V2 MR-413-X44-87F000$528_eng.mif
Vdiag No.: 04 08
MAIN SCREEN (CONTINUED)
NOTESOnly perform this conformity check after a thorough check with the diagnostic tool.
Conditions for applying the fault finding procedure: ignition on.
Order FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
5Buzzer controlET002:Buzzer controlACTIVE when the buzzer
sounds.
INACTIVE if not.In the event of a fault,
consult the interpretation
of status ET002.
6Proximity
sensorsPR001:Left-hand
outer sensor
distance26 cm < X < 150 cm
depending on the distance
from the obstacle (“out of
range” value: 0 cm).In the event of a fault, refer
to the interpretation of the
parameter PR001.
PR002:Left-hand
inner sensor
distance26 cm < X < 150 cm
depending on the distance
from the obstacle (“out of
range” value: 0 cm).If there is a fault, refer to
the interpretation of
parameter PR002.
PR003:Right-hand
outer sensor
distance26 cm < X < 150 cm
depending on the distance
from the obstacle (“out of
range” value: 0 cm).In the event of a fault,
consult the interpretation
of parameter PR003.
PR004:Right-hand
inner sensor
distance26 cm < X < 150 cm
depending on the distance
from the obstacle (“out of
range” value: 0 cm).If there is a fault, refer to
the interpretation of
parameter PR004.
PR005:Shortest
distance
calculated26 cm < X < 150 cm
depending on the distance
from the obstacle (value
out of range or less than
30 cm: 0 cm).If there is a fault, refer to
the interpretation of
parameter PR005.
7Caravan towbarPR026:Distance from
the caravan
attachment26 cm < X < 35 cm
This distance allows the
threshold point (0 cm)
from the rear of the vehicle
to be redetermined
according to the length of
the caravan towbarIn the event of a
permanent or erratic
warning signal, check that
no components are
disrupting the
measurement (sticker,
mud, snow on the rear
bumper, etc.) then
increase the distance of
the caravan towbar cm by
cm, using configuration
VP003 “Caravan towbar
distance”.

PARKING DISTANCE CONTROL
Fault finding - Interpretation of parameters
87F
87F - 36V2 MR-413-X44-87F000$792_eng.mif
Vdiag No.: 04 08
PR005
SHORTEST DISTANCE CALCULATED
NOTESSpecial notes:
Before searching for a fault with this parameter, make sure that no fault is present or
stored. If there is a fault, apply the interpretation for the fault detected by the
diagnostic tool.
Note:
The ultrasonic sensors are very fragile. Therefore, when removing the rear bumper,
be careful not to scratch them.
This parameter is an average calculated by the computer when an obstacle is
placed between two sensors.
When below 30 cm, the estimated distance is displayed as 0 cm (critical detection
zone with constant warning sound).
With the vehicle close to an obstacle (between 0 and 150 cm), check whether the calculated distance is consistent.
If the distance is inconsistent when there is an obstacle present, check that there is nothing interfering with the
measurement (sticker, mud, snow on the rear bumper, etc.).
If the distance calculated is still inconsistent or if it is continuously displayed as 255 cm, check the condition of the
sensors; the detection part (metallic outer part) must not have any scratches.
Replace the defective sensor.
If the fault is still present, apply the fault finding procedure to the sensor with the inconsistent distance parameter
(even if the diagnostic tool does not detect a fault), consult interpretation of faults, DF002 “Left-hand outer
sensor”, DF003 “Left-hand inner sensor”, DF004 “Right-hand outer sensor”, DF005 “Right-hand inner
sensor”.
AFTER REPAIRRepeat the conformity check from the start.
AAP_V04_ PR005/AAP_V08_ PR005

PARKING DISTANCE CONTROL
Fault finding - Customer complaints
87F
87F - 37V2 MR-413-X44-87F000$858_eng.mif
Vdiag No.: 04 08PARKING DISTANCE CONTROL
Fault finding - Customer complaints
NOTESOnly consult this customer complaint after a complete check with the diagnostic
tool.
NO DIALOGUE WITH THE COMPUTER ALP1
NO BUZZERALP2
WARNING SOUND EMITTED CONTINUOUSLY
(NO OBSTACLE DETECTED)ALP3
BUZZER SOUNDS CONTINUOUSLY
(WITH CARAVAN ATTACHMENT)ALP4
MR-413-X44-87F000$858_eng.mif

PARKING DISTANCE CONTROL
Fault finding - Fault Finding Chart
87F
87F - 39V2 MR-413-X44-87F000$924_eng.mif
Vdiag No.: 04 08
ALP2 No buzzer
NOTESOnly investigate this customer complaint after a full check using the diagnostic tool
(there must be no present or stored faults).
Using the diagnostic tool Main Data screen, check
that the parking distance control system is on.
The status ET003 Parking proximity sensor
function must be READY (and the red warning light
on the parking proximity sensor switch must be off).
Is status ET003 Parking proximity sensor
"READY"?
YES
Using the diagnostic tool's Main Data screen,
check that reverse gear is selected.
The ET001 Reverse gear selected status must be
YES.
Also ensure that the reversing lights come on when
reverse gear is selected.
Is status ET001 YES?
YES
Using the diagnostic tool configuration readings
screen, check that the buzzer volume has not been
switched off (LC001 Buzzer volume should not be
ZERO).
Is the LC001 function ZERO
NO
NOTurn on the parking proximity sensor by
pressing the switch for 1 or 3 s econds (the
red light should go out).
Note:
For more information concerning the
activation of the system, consult the
interpretation of status ET003 Parking
proximity sensor.
NOApply the interpretation of status ET001
Reverse gear engaged.
YESReconfigure the buzzer volume using the
diagnostic tool (command CF001 Buzzer
volume).
AFTER REPAIRCheck that the system is operating correctly.
AAP_V04_ ALP2/AAP_V08_ ALP2

PARKING DISTANCE CONTROL
Fault finding - Fault Finding Chart
87F
87F - 42V2 MR-413-X44-87F000$924_eng.mif
Vdiag No.: 04 08
ALP3 Buzzer sounds continuously (no obstacle detected)
NOTESOnly investigate this customer complaint after a full check using the diagnostic tool
(there must be no present or stored faults).
With no obstacle in front of the rear bumper (less than 150 cm away), check that the distance parameters on the
diagnostic tool display 0 cm for the “out of detection range” (PR001 “Left-hand outer sensor distance”, PR002
“Left-hand inner sensor distance”, PR003 “Right-hand outer sensor distance”, PR004 “Right-hand inner
sensor distance”).
If the parameters display a setting even though there is no obstacle in front of the rear bumper, make sure nothing
is interfering with the reading (sticker, mud, snow etc. on the rear bumper).
Repair if necessary.
WARNING
If heavy rain falls directly on to the head of the sensor (membrane), or if the sensor encounters certain noises
(pneumatic drill/hammer), the sensor may pick up these vibrations/waves and this may lead to random beeps. Do
not replace the sensor but inform the customer.
Switch off the ignition, and disconnect the parking proximity sensor
computer connector to check the insulation and continuity and ensure
the absence of interference resistance on the following connections:
Connection code 151R,
Connection code 151S.
Between components 1222 and 1223.
If the connection or connections are faulty and there is a repair procedure
(see Technical Note 6015A, Electrical wiring repair, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
Note:
The line coming from connection 151R of the computer must be insulated
against + 12 V and the line coming from connection 151S of the computer
must be insulated against the earth.
Repair if necessary (see vehicle wiring diagram).
Is the fault still present?
YES
End of fault finding procedure.
NOEnd of fault finding
procedure.
AFTER REPAIRCheck that the system is operating correctly.
AAP_V04_ ALP3/AAP_V08_ ALP3