laguna RENAULT SCENIC 2013 J95 / 3.G Electronic Parking Brake Workshop Manual

37B-2
MR-372-J84-37B000$072.mif
V11
37B
ELECTRONIC PARKING BRAKE
Fault finding – Introduction
1. SCOPE OF THIS DOCUMENT
This document presents the fault finding procedure applicable to all computers with the following specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type
Fault finding procedures (this document):
– Assisted fault finding (integrated into the diagnostic tool), Dialogys.
Wiring Diagrams:
– Visu-Schéma (CD-ROM), paper.
Type of diagnostic tools
–CLIP
Special tooling required
3. REMINDERS
Procedure
To save power, the UCH on the Laguna II Phase 2, Espace IV phase 1, 2 and 4, and Vel Satis phase 1 and 2
interrupts the + after ignition feed supply after 3 minutes.
To run fault finding on a computer, it is possible to force the + after ignition feed for 1 hour by applying the following
procedure:
– Press the card unlocking button,
– Insert the card into the reader,
– press the start button (interrupting the timed + after ignition feed mode),
– press the start button for more than 5 seconds, until the immobiliser warning light flashes rapidly (4 Hz).
This forced + after ignition feed mode remains active for 1 hour.
Pressing the start button or removing the card from the card reader interrupts the forced + after ignition feed, but
does not interrupt the time period for the forced + after ignition feed. Until one hour has elapsed, activating the +
after ignition feed will restart forced + after ignition feed for the remaining time. Vehicle(s): Vel Satis phase 1
Vel Satis phase 2
Laguna II Phase 2
Scénic II Phase 1 and
Scénic II Phase 2
Espace IV phase 1
Espace IV phase 2
Espace IV phase 4
Function concerned: Electronic parking brakeName of computer: FPA
Vdiag No.: 0C, 04, 08, 0D, 11
Special tooling required
Multimeter
Elé. 1681 Universal bornier
FPA_V0C_PRELI/FPA_V04_PRELI/FPA_V08_PRELI/FPA_V0D_PRELI/FPA_V11_PRELI
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
MR-372-J84-37B000$072.mif

37B-8
MR-372-J84-37B000$144.mif
V11
37B
ELECTRONIC PARKING BRAKE
Fault finding – System operation
PRESENTATION OF THE PARKING BRAKE:
The electronic parking brake provides the following functions:
– keeps the vehicle stationary when stopped (parking brake).
– 'dynamic' emergency brake (if the main brakes fail).
– automatic braking force adjustment according to the slope (adapted application),
– electronically-assisted parking brake application when the engine is stopped (depending on configuration),
– easy start with electronically-assisted parking brake release (depending on configuration),
– manual application and release by pulling on the lever.
SYSTEM COMPONENTS AND OPERATION:
The system consists of the following components:
●Control lever with brake on indicator light.
– For applying and releasing the parking brake.
●Control unit (computer) housing an electric motor, the brake cable hooks, angle sensor and force sensor.
–The angle sensor controls locking according to the angle of the slope.
–The force sensor checks and corrects the force applied to the brakes.
●Clutch pedal position sensor to help with pulling away.
– Informs the computer of the vehicle's clutch position (the position of the pedal enables the torque necessary for
vehicle movement to be obtained).
●Tw o mechanical cables
– Convey the mechanical force to the rear brakes.
●Emergency control cable (in the central storage compartment on the LAGUNA, VEL SATIS and ESPACE and in
the boot on the SCENIC).
– Enables the rear brakes to be released in the event of the battery or parking brake failing.
●Warning lights and symbol on the instrument panel.
– Indicate application, releasing and any faults on the parking brake.
Note:
The parking brake cable play compensation is performed automatically by the control unit.
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
MR-372-J84-37B000$144.mif

37B-13
MR-372-J84-37B000$288.mif
V11
37B
ELECTRONIC PARKING BRAKE
Fault finding – Replacement of components
A/ PROCEDURE FOR REPLACING AN ELECTRONIC PARKING BRAKE COMPUTER
●For the description of the mechanical operations for replacing the control unit (computer) and brake cables (see
MR405 (Espace IV) or MR395 (Laguna II) or MR370 (Scénic), Mechanical, 37B, Electronic parking brake,
Control unit: Removal - Refitting and 37A, Mechanical component controls, Parking brake cables:
Removal - Refitting or MR353 (Vel Satis), Mechanical, 37B, Automatic parking brake, Control unit and
brake cables).
●The parking brake cables must always be replaced when the computer is replaced.
●In the same way, the computer must be replaced when the parking brake cables are changed.
●Conversely, the lever and the parking brake are independent of one another.
●Lever replacement must be carried out with + after ignition feed switched off and the parking brake released,
otherwise faults may occur.
●The clutch sensor must be replaced with + after ignition feed switched on to avoid a fault being provoked.
BEFORE REPLACING THE PARKING BRAKE COMPUTER:
If the vehicle has a manual gearbox, recover the clutch data from the memory of the old computer so that it can be
entered into the new computer (see section C).
Operations to perform before replacement:
– Switch on the ignition, connect the diagnostic tool and establish dialogue with the computer (parking
brake field).
– before replacing the computer, check that it is actually causing the fault by reading the faults and apply
the fault finding procedure concerned.
Steps to follow after replacement:
– with the ignition switched off, replace the electronic parking brake computer (with the approval of
Te c h l i n e ) .
– switch on the ignition, connect the diagnostic tool and establish dialogue with the computer (parking
brake field),
– apply the procedure described in section B: NEW COMPUTER CALIBRATION AND INITIALISATION,
– release the parking brake lever to reset the cables.
– check parking brake operation by testing the braking, maximum braking, and release,
– read the faults to clear any stored faults and check that replacing the computer has enabled the fault on
the vehicle to be rectified (no faults present).
– read the configuration (repair mode menu) to check that the parking brake computer configuration has
been correctly configured.
– depending on the configuration chosen, check the assisted braking and release. Note:
An electronic parking brake computer should be replaced only when requested by the Techline (fill out the fault
finding log).
Note:
With an automatic transmission, no data recovery is required (the computer can be replaced without applying
sections C and D).
Important:
Do not clear the faults from the computer before replacing it.
IMPORTANT: It is strictly forbidden to drive a vehicle with an electronic parking brake computer unless it is in
customer mode.
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
MR-372-J84-37B000$288.mif

37B-15
MR-372-J84-37B000$288.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Replacement of components
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
C/ CLUTCH DATA BACKUP (for vehicles with a manual gearbox)
Purpose of the procedure:
The data saved relates to the clutch engagement point. This is important when the clutch wears, because this data
enables the parking brake to release electronically when the clutch enables the vehicle to move off.
If this data cannot be retrieved from the old computer (impossible to establish dialogue with the diagnostic tool) or a
new clutch has been fitted, the new computer has to be programmed with the clutch engagement point: drive the
vehicle, downshifting at least 30 times (from 5
th to 4th gear) before returning the vehicle to the customer.
If the clutch data is not recorded in the new computer, the operation of the assisted brake on steep slopes will be
impaired when first used.
Perform the following operations:
– establish dialogue with the computer,
– select the repair mode menu on the diagnostic tool.
– open the programming menu,
– run function SC005 Backup clutch pedal programming (the data is written to a file that is automatically
selected when the new computer is programmed).
– replace the electronic parking brake computer (see MR405 (Espace IV) or MR395 (Laguna II) or
MR370 (Scénic), Mechanical, 37B, Electronic parking brake, Control unit: Removal - Refitting or
MR353 (Vel Satis), Mechanical, 37B, Automatic parking brake, Control unit),
– follow the procedures described in sections A and B.
D/ CLUTCH DATA ENTRY (for vehicles with automatic transmission)
The initialisation must be carried out (sections A and B).
Perform the following operations:
– establish dialogue with the computer,
– select the repair mode menu on the diagnostic tool.
– open the programming menu,
– run function: SC006 Enter clutch pedal programming.
– check that the electronic parking brake is operating correctly, including the assisted release function. IMPORTANT:
Do not apply this procedure in the event of a clutch fault.
Note:
– For vehicles fitted with an automatic gearbox, command SC005 Save clutch pedal programming is
unavailable.
– Command SC006 Enter clutch pedal programming, is also unavailable if command SC005 has not already
been activated.

37B-19
MR-372-J84-37B000$504.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
DF003
CONTINUED
Disconnect the electronic parking brake computer connector (under the body near the rear axle) to check the
conformity of the power supply (this must equal the voltage measured at the battery terminals ± 0.5 V).
Check the insulation, continuity and the absence of interference resistance on the following connections:
Electronic parking brake computer connector
track H4
(except Laguna II, Vel Satis and Espace IV)
track G4+12V
track H2
(except Laguna II, Vel Satis and Espace IV)
track G2earth
Note:
If the electrical supply is correct, check that the supply has not been cut off by moving the electrical harness
(near to the intermediate connector under the front left-hand seat at the computer connector).
Repair if necessary (see the vehicle wiring diagram).
If the fault persists, contact the Techline.
AFTER REPAIRIf the computer has been replaced (at the request of the Techline), initialise the
electronic parking brake computer (see Replacement of components).
Issue several braking and release commands to confirm the repair.
Deal with any other faults.

37B-31
MR-372-J84-37B000$504.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
DF035
PRESENT
OR
STOREDUNDERVOLTAGE
1. DEF: Insufficient feed voltage during the command
NOTESPriority in the event of a number of faults:
Deal with fault DF055 Battery undervoltage first if it is present or stored.
Conditions for applying the fault finding procedure to a stored fault:
Apply this fault finding procedure if the fault reappears after the ignition has been
switched off and on again (+ forced after ignition feed: see Introduction) and an
application or release request using the control lever.
Special notes:
This fault is a power supply fault and does not usually stem from the electronic
parking brake computer.
This fault does not indicate computer feed undervoltage but a significant drop in
voltage to the parking brake motor while the command is being issued.
Only for Vdiag 08, 0C and 0D:
If there is a stored fault, refer to the statuses and parameters when it appears.
Explanation of counters: see Introduction.
If the fault is stored and PR018 = 0 and PR022 > 25, clear the fault:
do not take this fault into account.
Disconnect the electronic parking brake computer connector to check the conformity of the supplies and to
check the insulation, continuity and the absence of interference resistance on the following connections:
Electronic parking brake computer connector
track H4
(except Laguna II, Vel Satis and Espace IV)
track G4+12V
track H2
(except Laguna II, Vel Satis and Espace IV)
track G2earth
Repair if necessary (see the vehicle wiring diagram).
Apply the brake and then release it (engine running) to check that during the command the voltage measured at
the fuse does not drop below 10.5 V.
Make the repairs necessary for the parking brake computer electrical supply to be correct (equal to the battery
voltage).
If the fault persists, contact the Techline.
AFTER REPAIRIf the computer has been replaced (at the request of the Techline), initialise the
electronic parking brake computer (see Replacement of components).
Issue several braking and release commands to confirm the repair.
Deal with any other faults.
FPA_V0C_DF035/FPA_V04_DF035/FPA_V08_DF035/FPA_V0D_DF035/FPA_V11_DF035

37B-46
MR-372-J84-37B000$504.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
DF044
CONTINUED 2
With the parking brake control lever connector disconnected, check the insulation, continuity and absence of
interference resistance on the following connections:
Parking brake lever connector: 1216Electronic parking brake computer: 1217
track 9
track 7track D2
track C2
Repair if necessary.
With the parking brake control lever connector disconnected, switch on the ignition and check for a 5 V supply
(4 V < X < 5 V) on track 7 of the lever connector. If the power supply is not present and the parking brake
computer is correctly supplied (no other faults detected by the diagnostic tool), then contact the Te c h l i n e.
If the fault is still present, measure the resistance of the braking switch between tracks 7 and 9 of the parking
brake control lever.
Replace the lever (see MR405 (Espace IV), MR395 (Laguna II) or MR370 (Scénic), Mechanical, 37B,
Electronic parking brake, Lever: Removal - Refitting or MR353 (Vel Satis), Mechanical, 37B, Automatic
parking brake, Lever) if the resistance of the brake application switch is not approximately:
– Lever in rest position: 2700  ± 100 
– Lever pulled: 172  ± 15 .
If the fault persists, contact the Techline.
AFTER REPAIRIf the computer has been replaced (at the request of the Techline), initialise the
electronic parking brake computer (see Replacement of components).
Issue several braking and release commands to confirm the repair.
Deal with any other faults.

37B-48
MR-372-J84-37B000$504.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
DF045
CONTINUED
With the parking brake control lever connector disconnected, check the insulation, continuity and absence of
interference resistance on the following connection:
Parking brake lever connector: 1216Electronic parking brake computer: 1217
track 10 track C3
Repair if necessary.
With the parking brake control lever connector disconnected, check for earth on track 2 of the lever connector.
Repair if necessary.
If the fault persists, check the redundant braking switch:
Lever in rest position: insulation between tracks 2 and 10 of the lever.
Lever fully applied: continuity between tracks 2 and 10 of the lever.
Replace the parking brake control lever if it does not function as indicated (see MR405 (Espace IV), MR395
(Laguna II) or MR370 (Scénic), Mechanical, 37B, Electronic parking brake, Lever: Removal - Refitting or
MR353 (Vel Satis), Mechanical, 37B, Automatic parking brake, Lever).
If the fault persists, contact the Techline.
AFTER REPAIRIf the computer has been replaced (at the request of the Techline), initialise the
electronic parking brake computer (see Replacement of components).
Issue several braking and release commands to confirm the repair.
Deal with any other faults.

37B-51
MR-372-J84-37B000$504.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
DF047
CONTINUED
If the statuses do not operate as explained above, check the connection and condition of the parking brake
control lever connector.
Repair if necessary.
With the parking brake control lever connector disconnected, check for earth on track 2 of the lever connector
(repair if necessary).
Also check for a 5 V supply (4 V < X < 5 V) on track 7 of the lever connector.
If the supply is not present and the parking brake computer is correctly supplied (no other faults detected by the
diagnostic tool), then contact the Te c h l i n e.
Check the condition and connection of the electronic parking brake computer connectors and their clips
(terminals).
Repair if necessary.
With the parking brake control lever connector disconnected, check the insulation (from earth and to+ 12 V and
the insulation of the 4 wires from each other), the continuity and absence of interference resistance on the
following connections:
Parking brake lever connector: 1216Electronic parking brake computer: 1217
track 9
track 7
track 10
track 4track D2
track C2
track C3
track D3
Repair if necessary.
With the parking brake control unit connector disconnected, check the insulation between tracks C2 and D2 of
the computer. If the tracks are in short circuit, replace the lever (see Replacement of components, Part A/
Procedure for replacing an electronic parking brake computer) (see MR405 (Espace IV) or MR395
(Laguna II) or MR370 (Scénic), Mechanical, 37B, Electronic parking brake, Lever: Removal - Refitting or
MR353 (Vel Satis), Mechanical, 37B, Automatic parking brake, Lever).
If the fault persists, contact the Techline.
AFTER REPAIRIf the computer has been replaced (at the request of the Techline), initialise the
electronic parking brake computer (see Replacement of components).
Issue several braking and release commands to confirm the repair.
Deal with any other faults.

37B-53
MR-372-J84-37B000$504.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
DF048
CONTINUED
If the statuses do not operate as explained above, check the connection and condition of the parking brake
control lever connector.
Repair if necessary.
With the parking brake control lever connector disconnected, check for earth on track 2 of the lever connector.
Repair if necessary.
Check the connections and condition of the electronic parking brake computer connectors and their clips
(terminals) and its intermediate connector (under front left-hand seat).
With the parking brake control lever connector disconnected, check the insulation, continuity and absence of
interference resistance on the following connection:
Parking brake lever connector: 1216Electronic parking brake computer: 1217
track 4 track D3
Repair if necessary.
If the fault is still present, check the release switch.
Lever in rest position: insulation between tracks 2 and 4 of the lever,
Lever fully applied and release switch pressed: continuity between tracks 2 and 4 of the lever.
Replace the parking brake control lever if it does not function as indicated (see Replacement of components,
Part A/ Procedure for replacing the electronic parking brake computer) (see MR405 (Espace IV) or MR395
(Laguna II) or MR370 (Scénic), Mechanical, 37B, Electronic parking brake, Lever: Removal - Refitting or
MR353 (Vel Satis), Mechanical, 37B, Automatic parking brake, Lever).
If the fault persists, contact the Techline.
AFTER REPAIRIf the computer has been replaced (at the request of the Techline), initialise the
electronic parking brake computer (see Replacement of components).
Issue several braking and release commands to confirm the repair.
Deal with any other faults.