Electric Parking Brake Control Unit, Component Description - GF42.20-P-5005GN

MODEL 166 as of model year 2016

MODEL 292

Shown on model 292

Fig 1: Electric Parking Brake Control Unit Component Location - Shown On Model 292, Model 166 As Of Model Year 2016 Similar

Courtesy of MERCEDES-BENZ USA

Location

The electric parking brake control unit is located below the rear bench seat on the right side.

Tasks

The electric parking brake control unit has the following tasks:

Reading in of signals

The input factors are read in via the following connections:

Direct line

The status of the electric parking brake switch (S76/15) is read in directly.

Chassis CAN 1

The following information is read in over chassis CAN 1:

Status circuit 15 ON, from the electronic ignition lock control unit (N73)
Status of driver seat belt buckle restraint system switch (S68/3), from the supplemental restraint system control unit (N2/10)
Status of liftgate rotary tumbler switch (M14/7s1) from the rear SAM control unit (N10/8), via the interior CAN (CAN B) and the electronic ignition lock control unit
Status of left front door first detent microswitch (A85s1), from left front door control unit (N69/1), via interior CAN to electronic ignition lock control unit
Currently engaged gear range from the fully integrated transmission control unit (Y3/8n4), via the drive train CAN (CAN C) and ME-SFI [ME] control unit (N3/10) (with gasoline engine) or the CDI control unit (N3/9) (with diesel engine)
Status of drive train (operational), engine (running) and accelerator pedal (position) from the ME-SFI [ME] control unit (with gasoline engine) or from the CDI control unit (with diesel engine)
Wheel speeds to determine the vehicle speed, from the electronic stability program control unit (N30/4)

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components

The actuation of the components takes place via the following connections:

Direct line

The following components are actuated via a direct line:

Chassis CAN 1

The following components are actuated via chassis CAN 1:

Instrument cluster (A1) (output of messages and warnings), via the electronic ignition lock control unit and chassis CAN 2
Electronic Stability Program control unit (initiation of emergency braking)

Designation	Unit	Values	Tolerance range	Remarks
Electric parking brake control unit
Voltage supply	V
Voltage limits	V	6, 3...8, 3	± 0, 5	Lower limit value (full functionality as of 8.3 V)
		17...18	0, 8	Upper limit value
Power consumption	A	0, 260		Standby
		17...25		Operation
		34		Peak current
		0, 03		No-load current
Reverse polarity protection				Yes
Flash capability/coding capability				Yes/yes

Wiring diagram for electric parking brake control unit