ABS electronic control unit
M50 is supplied (at pins 12 and
25) directly by the battery by the line protected by maxifuse F5
of the engine compartment junction unit B1.
The ignition-operated supply (INT/A) reaches
pin 23 from the line protected by the fuse
F42 of under facia
control unit B2.The control unit is earthed via pins 11
and 24.
The four sensors
K70, K71, K75, K76 send
wheel speed signals tp pins 20-19, 8-7, 22-21, 10-9 of M50, respectively.
Brake pedal switch
I30 sends an enablement
signal to pin 17 of control unit M50: the ABS cannot intervene unless
the brake pedal is pressed.
The switch
I30
is supplied
when the ignition is switched on (INT) from fuse F37 of junction
unit
B2
.
Pin 16 ofi
M50 emits a discrete speed
signal that is sent tol Body Computer M1;
the same signal is
also copied via the CAN network.
The steering sensor is contained in the
electric steering control unit
M86 which is connected to the
ABS control unit M50 via the CAN.
The yaw (and lateral acceleration) sensor
K74
receives an ignition-operated supply at pin 1 from the line protected
by fuse F42 of the junction unit under the dashboard B2;
pin
6 is earthed, whilst pins 5 and 3 are connected to the ABS control
unit
M50 via the CAN.
The 'ASR OFF' control button on panel
H90
sends a deactivation signal to pin 3 of M50, while pin 4 relays
a signal that turns on an LED on panel H90 when the system is off;
; The
switch
H90 is supplied when the ignition is switched on (INT)
from fuse F49 of junction unit B2.
Pins 1 and 2 of ABS control unit
M50
connect to engine control unit M10, Body Computer M1 and and instrument
panel E50 to control the ABS, insufficient brake fluid and handbrake
applied warning lights and the ASR/ESP and HH warning lights.The special 'fault' warning light comes
on if there is a problem with one of the above mentioned warning
lights.
Self-diagnostic data can be read by connecting
to connector C of Body Computer
M1- pin 1: it receives signals
from pin 6 of the control unit M50 via the special diagnostic line. See E8010 DIAGNOSTIC MULTIPLE CONNECTOR