Anti-Lock Brake System Control Module

WARNING: This page is about a different car, the 2018 Land Rover Discovery and 2017 Land Rover Discovery. However, it is still accessible from the selected car via links, so may be relevant.

ITEM	DESCRIPTION
1	Rear right brake outlet port
2	Front left brake outlet port
3	Front right brake outlet port
4	Rear left brake outlet port
5	Primary circuit inlet port
6	Secondary circuit inlet port
7	Hydraulic control unit
8	Electrical connector
9	Control module

The Anti-lock Brake System (ABS) control module controls the two Electric Park Brake (EPB) actuators separately.

A longitudinal motion sensor is integrated into the Restraints Control Module (RCM) which communicates with the ABS control module on the High Speed (HS) Controller Area Network (CAN) chassis systems bus. The longitudinal motion sensor allows the ABS control module to determine the longitudinal attitude of the vehicle and to monitor the deceleration of the vehicle. For additional information, refer to: AIRBAG AND SAFETY BELT PRETENSIONER SUPPLEMENTAL RESTRAINT SYSTEM - [+] VEHICLES WITH 2ND/3RD ROW SEATS .

NOTE: The longitudinal sensor is an accelerometer mounted and calibrated to provide both longitudinal and gradient information.

Four hardwired connections within the EPB switch give the ABS control module the EPB apply and EPB release inputs. The EPB is integrated into the ABS control module. The wheel speed sensors are also hard wired into the ABS control module.

Inputs from other components are received on the FlexRay circuit as follows:

Accelerator Pedal Position (APP) sensor, from the Powertrain Control Module (PCM).
Stop lamp switch, from the PCM.
Gear position, from the Gear Shift Module (GSM).

In addition to the hardwired outputs to the EPB actuators, the ABS control module outputs status and fault signals on the FlexRay bus and the HS CAN chassis systems bus. These outputs operate the warning indicators and advise other systems if there is a fault with the EPB system.