lock 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

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ELECTRONIC PARKING BRAKE
Fault finding – Introduction
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
4. FAULT FINDING PROCEDURE (CONTINUED)
Wiring check
Fault finding problems
Disconnecting the connectors and/or handling the wiring harness may temporarily remove the cause of a fault and
create other faults.
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.
Physical inspection
While manipulating the wiring, 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.
Continuity and insulation 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.

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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

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ELECTRONIC PARKING BRAKE
Fault finding – System operation
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
MANUAL OPERATION:
– The parking brake is engaged by pulling on the control lever (normal braking immobilises the vehicle).
– Over-application can be obtained by pulling and holding the lever for 5 seconds (maximum application for steep
hills or when the vehicle has reached its maximum permissible all-up weight).
– When the parking brake is applied, the computer super-applies if the force applied to the rear brake callipers is
insufficient (pads cooling) or if the computer detects slight vehicle movement. This detection is limited to
24 hours.
– The parking brake is released when the control lever is applied fully and the release switch is pressed.
ASSISTED OPERATION:
The electronic parking brake enables assisted application and release of the brake:
●Applying the brake: When the engine is switched off, the parking brake is applied when the driver presses the
start button
●Releasing: The brake releases when the drive wheels reach the torque required to move the vehicle
(Note:with automatic transmission, the driver's door must be closed).
Restrictions on assisted brake release in automatic transmissions:
Assisted release is not allowed in the following cases:
– Opening the driver's door followed by engaging a gear (gear lever in position D).
– Engaging a gear (gear lever in position D) followed by opening the driver's door. Note:
When the parking brake is applied, the red light on the instrument panel (brake pads) and indicator light on the
lever are lit.
Below 6 mph (10 km/h) pulling the lever applies the rear brakes. Above 6 mph (10 km/h) pulling the lever
provides dynamic emergency braking without locking the rear wheels (statutory deceleration of 1.5 m/s
2).
The electronic parking brake can only be released when the steering column is unlocked (forced + after ignition
feed, see Introduction).
Note: In this case, the instrument panel displays the message Lever in P or N and the buzzer on the instrument
panel sounds.
Note: In this case, release is authorised for 5 s after the driver's door has been opened (e.g. for a manoeuvre).
After 5 seconds release is prevented.
Note:
Assisted braking and release only occurs if the computer has been configured.
For details on how these configurations function, see Configuration and programming.

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ELECTRONIC PARKING BRAKE
Fault finding – System operation
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
GENERAL OPERATING MODE FOR THE COMPUTER:
The electronic parking brake computer operates in two modes: STANDBY mode and SWITCH ON mode.
●SWITCH ON mode:
Available functions:
– Manual application and release, assisted application and release and emergency braking (steering column
unlocked).
– Full system fault finding (all faults can be identified).
Switch on conditions (3 possibilities):
– The UCH sends a switch on request to the parking brake computer via the multiplex network when the vehicle
is opened or the card is inserted in the reader.
– Braking request via the parking brake control lever.
– Battery voltage more than 13.2 V, if the vehicle has been parked for less than 24 hours.
●STANDBY mode:
Available functions:
– Monitoring of the braking force and slope angle for 24 hours (to ensure parking brake application).
– Only application is authorised (using the lever).
– Restricted system fault finding (the computer can no longer identify all faults).
– Release not authorised.
Conditions for setting to standby:
– The UCH sends a "set to standby" request to the parking brake computer via the multiplex network after the
ignition is switched off and the vehicle is locked (after a few seconds). The parking brake computer's STANDBY
mode will be confirmed by the lever warning light going out (special note: the battery voltage must be less than
13.2 V).
CABLE RESETTING:
The parking brake cable is locked after the control lever is released or after driving at over 1 mph (2 km/h) (switched
on mode).
When the electronic parking brake system locks, it makes a sound that lasts for a few seconds and ends with
clicking (play compensation is automatic).WARNING
Before using the emergency control, it is important to put the vehicle into gear and wedge one wheel if necessary
(on a slope).

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ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults37B
DF025
CONTINUED
2. DEF
NOTESSpecial notes:
– This fault indicates that the electronic parking brake
computer detected front wheel movement although the
parking brake was applied with maximum force.
When this fault appears on its own it is an operating warning
that indicates that the vehicle's conditions of use are on the
limit (the braking system and parking brake are not normally
the cause).
This fault is an operational warning. Check the context in
which it appears.
It may appear during:
– an application request, whilst the vehicle is still being
driven,
– forced assisted release when starting, when the
starting conditions have not been met,
– parked on a steep slope with slippery surface,
– incorrect use of a roller test bench which drives the
front wheels (MOT test).
If the fault is stored, refer to the statuses and
parameters when it appears. Explanation of counters:
seeIntroduction section.
If the fault is stored and PR018 = 0 and PR022 > 25 clear
the fault: do not take this fault into account.
Using the diagnostic tool, display the wheel speed parameters on the parameters screen.
When stationary, these parameters must show 0 mph. If this is not the case, carry out fault finding on the anti-
lock braking system (see 38C, Anti-lock braking system).
Check that the parking brake mechanical tensioning line is correct:
– Parking brake cables correctly fitted.
– Good condition of the parking brake cables (no seizing or deterioration).
– Conformity, condition and proper functioning of the rear brake callipers.
– Condition and conformity of rear brake pads.
Carry out the necessary repairs.
Check that the vehicle is not overloaded.
Check that the vehicle's tyres are not bald.
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
Vdiag No.: 0D, 11

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ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults37B
DF025
CONTINUED
Using the diagnostic tool, display the wheel speed parameters on the parameters screen.
When stationary, these parameters must show 0 mph. If this is not the case, carry out fault finding on the anti-lock
braking system.
Check that the parking brake mechanical tensioning line is correct:
– Parking brake cables correctly fitted.
– Good condition of the parking brake cables (no seizing or deterioration).
– Conformity, condition and proper functioning of the rear brake callipers.
– Condition and conformity of rear brake pads.
Carry out the necessary repairs.
Check that the vehicle is not overloaded.
Check that the vehicle's tyres are not bald.
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
Vdiag No.: 0C, 04, 08

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ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
DF037
CONTINUED
Using the diagnostic tool, run fault finding on the multiplex system and particularly on the ABS computer-
parking brake control unit segment.
This check ensures that the various multiplex system connections are correct and finds any faulty segments.
Carry out any necessary repairs.
If the multiplex system test did not find the faulty connection, carry out a conformity check to check that the
parameters coming from the ABS computer are present and correct (PR012, PR013, PR014).
If the parameters mentioned are not correct, carry out an ABS computer fault finding procedure (see 38C, Anti-
lock braking system).
If the fault is still present, disconnect the computer connector to check that it is in good condition as well as its
clips (terminals), in particular the clips for the multiplex tracks (refer to the wiring diagram for the ABS computer
fitted to the vehicle).
Replace the clips if necessary.
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.

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ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
DF046
PRESENT
OR
STOREDBRAKE MOTOR/CABLES CONNECTION
(EMERGENCY UNLOCKING)
1. DEF: Parking brake unlocked by the emergency handle
NOTESPriority when dealing with a number of faults:
Deal first with faults DF003, DF004, DF028, DF029, DF035, DF041, DF042, DF043,
DF050, DF054, DF055, DF057, DF058 and DF073 if they are present or stored.
Conditions for applying the fault finding procedure to a stored fault:
Apply this fault finding procedure if the fault recurs after the fault is cleared, with the
ignition switched off and on again (forced + after ignition feed, see Introduction),
and the parking brake released then applied using the control lever.
Special notes:
The fault does not usually come from the electronic parking brake computer.
This fault indicates that the electronic parking brake system has been unlocked by the
manual control (if this is the case, check that the handle protector has not been
damaged).
Check that the emergency unlocking handle has not been manually pulled by the
user, which would provoke this fault.
The cables are reset by the parking brake release manual command or automatically
(if the fault is present) when the vehicle is driven at more than 1.2 mph (2 km/h)
(the fault is then stored).
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.
If there has been no manual use of the emergency unlocking handle and if PR019 > 5,
contact the Techline.
Check that the fault was not provoked by manual usage of the emergency unlocking handle. In this case, it is
normal for the fault to arise; clear the fault.
Carry out a releasing command, then a braking command with the control lever to reset the cables of the parking
brake.
Check the conformity of the parking brake mechanical tensioning line: correctly attached, no breakage.
Check the conformity of the emergency unlocking cable.
Carry out the necessary repairs.
Check that the braking force and maximum braking are operating correctly.
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_DF046/FPA_V04_DF046/FPA_V08_DF046/FPA_V0D_DF046/FPA_V11_DF046

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ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
DF052
CONTINUED
Check that an additional booster battery has not been used when starting, if this is the case, this fault may appear.
Use the diagnostic tool to carry out a multiplex system test.
This check ensures that the various multiplex system connections are correct and finds any faulty segments.
Carry out any necessary repairs.
If the multiplex system test has not made it possible to find the defective connection, disconnect the electronic
parking brake computer connector to check it is in good condition and check the condition of the clips (terminals)
and in particular the clips for tracks A2 and A3.
Replace the clips if necessary.
With the electronic parking brake computer connector disconnected, check the insulation, continuity and the
absence of interference resistance on the connections between tracks A2 and A3 of the electronic parking
brake computer and the following computers:
– anti-lock braking system (see diagram of the various computers),
– injection (see diagram of the different computers),
– automatic transmission (see diagram of the different computers),
– UCH (see diagram of the different computers),
– Protection and Switching Unit (see diagram of the different computers).
Repair if necessary.
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.