37B-56
MR-372-J84-37B000$504.mif
V11
ELECTRONIC PARKING BRAKE
Fault finding – Interpretation of faults37B
DF049
CONTINUED 1
2. DEF
NOTESSpecial notes:
The specification 2.DEF mainly comes from a fault with the
electrical power supply, braking application travel or the
internal force sensor.
If this fault appears after the parking brake has been replaced:
– Check the conformity of the parking brake fitting.
– Check that the battery voltage PR001 is greater than 12.5 V.
– Clear the fault and restart the procedure for fitting the parking brake: see Replacement of components.
Check the fault context when the fault appears: if the battery voltage PR001 is less than 9 V when the fault
appears, then:
– Check the supply line and that the resistance is less than 150 m.
– If there is no sign of a fault on the supply line and if PR019 < 3 and PR022 > 25 and PR018 < 15 then clear
the fault.
Check the fault context when the fault appears: If ET028 Brake switch signal is PRESSED, then:
–If PR019 < 3 and PR022 > 25 and PR018 < 15, then clear the fault.
– The fault can be caused when the user depresses the brake pedal hard, when the parking brake is being
applied. If this is the case, clear the fault.
If there is a loud noise when applying, when maximum braking is requested, then the cause may be mechanical.
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.
– Conformity of rear brakes bleeding.
Carry out the necessary repairs.
Using the diagnostic tool (PARKING sub-function), display the parameters PR005 Force setpoint and PR004
Measured force value. These must have the various values recorded in the conformity check.
If the fault is still present, 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, 08, 0D,
11
