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

37B-4
MR-372-J84-37B000$072.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Introduction
FPA
Vdiag No.: 0C, 04, 08,
0D, 11
37B
Faults
Faults are declared present or stored (depending on whether they appeared in a certain context and have
disappeared since, or whether they remain present but are not diagnosed within the current context).
The present or stored status of faults should be taken into consideration when the diagnostic tool is used following
the + after ignition supply being switched on (without acting on the system components).
For a present fault, apply the procedure described in the Interpretation of faults section.
For a stored fault, note the faults displayed and apply the instructions in the Notes section.
If the fault is confirmed when the instructions are applied, the fault is present. Deal with the fault.
If the fault is not confirmed, check:
– the electrical lines which correspond to the fault,
– the connectors for these lines (for oxidation, bent pins, etc.),
– the resistance of the faulty component,
– the condition of the wires (melted or split insulation, wear).
Conformity check
The aim of the conformity check is to check data that does not produce a fault on the diagnostic tool when the data
is inconsistent. Therefore, this stage is used to:
– carry out fault finding on faults that do not have a fault display, and which may correspond to a customer
complaint,
– check that the system is operating correctly and that there is no risk of a fault recurring after repairs.
This section gives the fault finding procedures for statuses and parameters and the conditions for checking them.
If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the
corresponding fault finding page.
Customer complaints - Fault finding chart
If the test with the diagnostic tool is OK but the customer complaint is still present, the fault should be dealt with by
Customer complaints.
A summary of the overall procedure to follow is provided on the following page in the
form of a flow chart.

37B-49
MR-372-J84-37B000$504.mif
V11
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

37B-54
MR-372-J84-37B000$504.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults37B
DF049
PRESENT
OR
STOREDBRAKING
1. DEF: Inconsistent braking value
2. DEF: Normal brake application value not reached
3. DEF: Normal brake release value not reached
4. DEF: Insufficient braking force
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present after:
– a braking command is issued on a slope.
Priorities when dealing with a number of faults:
Deal with faults: DF046 Brake motor / cables connection, DF050 Mechanical
seizure, DF035 Undervoltage, DF058 Parking brake motor current and DF055
Battery undervoltage first if they are present or stored.
Check that the parking brake mechanical tensioning line is correct:
– that the parking brake cables are fitted correctly (refer to the repair procedure),
– that the parking brake cables are in good condition (not seized or deteriorated),
– that the rear brake callipers are correct, in good condition and operating correctly,
– that the rear brake pads are correct and in good condition.
Carry out the necessary repairs.
Using the diagnostic tool statuses screen, display parameter PR003 Slope value.
If the value displayed is not 0 degrees (± 1) on level ground, carry out slope initialisation again (actuator control
mode menu).
Using the diagnostic tool parameters screen, display the following parameters: PR005 Force setpoint and PR004
Measured force value. These must show the various values recorded in the conformity check.
Clear the fault, switch off the ignition for 5 minutes (vehicle doors and windows closed), switch the ignition back
on and repeat a braking command on a slope.
If the fault reappears, switch off the ignition and disconnect the computer supply fuse (fuse F23 of the engine fuse
box, refer to the wiring diagram) for approximately 1 minute.
Reconnect the fuse, switch the ignition on and establish dialogue with the computer. Apply the brake to check
whether the fault recurs.
If the fault reappears despite the above tests, or if the parameter values are not within conformity check
tolerances while the brake is applied, then contact your Techline.
AFTER REPAIRClear the fault memory.
Follow the instructions to confirm repair.
If 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 possible faults.
FPA
Vdiag No.: 04
FPA_V04_DF049