ABS - FUNCTIONAL DESCRIPTION

1.1, 1.2 8v

Operational description

The ABS control unit M050 receives a direct battery supply at pins 2 and 3 and an ignition-operated supply at pin 18; the lines are protected by fuses F04 and F42 , both located in the engine compartment junction unit B001.

The brake pedal switch I030 contact closed signal reaches the ABS control unit M050 (pin 20) and the body computer node M001 (pin 5 connector B) simultaneously.

The ABS control unit M050:

• from pins 16, 9 supplies the left front wheel sensors K070 and the right ones K071;
• from pins 6, 19 supplies the left rear wheel sensors K075 and the right ones K076;
• from pins 1, 10 receives the signals supplied by the left front wheel sensors K070 and the right ones K071;
• from pins 17, 8 receives the signals supplied by the left rear wheel sensors K075 and the right ones K076;

The body computer node M001 receives the signal at pin 18 connector C and communicates, via the serial line, with the ABS control unit M050 from pins 14 and 18 of connector D.

The ABS control unit M050 is connected to earth C012 at pin 1 and pin 4, whilst pin 11 is dedicated to the K line for the fault diagnosis.

See E8010 DIAGNOSTIC MULTIPLE CONNECTOR

If a fault signal is received from the ABS control unit, the body computer node lights up the warning light in the instrument panel via the CAN (for more details

See E4010 INSTRUMENT PANEL

).

Coupling D001 is housed, in the passenger compartment, in the lower part of the right front pillar, near the door cable loom, passenger side.

1.2 8v · 4X4, POWERED THROTTLE

Operational description

The ABS control unit M050 receives a direct battery supply at pins 2 and 3 and an ignition-operated supply at pin 18; the lines are protected by fuses F04 and F42 , both located in the engine compartment junction unit B001.

The brake pedal switch I030 contact closed signal reaches the ABS control unit M050 (pin 20) and the body computer node M001 (pin 5 connector B) simultaneously.

1.3 JTD 16v

Functional description

The ABS control unit M050 receives a direct battery supply at pins 2 and 3 and an ignition-controlled supply at pin 18; the lines are protected respectively by fuses F04 and F42, both located in the engine compartment junction unit B001.

The brake pedal switch I030 comprises two internal switches, one normally open (N.A.) type and one normally closed (N.C.) type.

In case of braking:

• the ABS control unit M050 (at pin 20) and the body computer node M001 (at pin 5 connector B) receive a positive signal, referred to the line protected by fuse F37 located in the junction unit under the dashboard B002;
• at the engine management control unit M010, at pin 68 connector B, the supply line protected by fuse F42, located in the junction unit under the dashboard B002, is interrupted (see See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT ).

The body computer node M001 receives the vehicle speed signal, at pin 18 of connector C, supplied by the ABS control unit which processes the data taken from the ABS wheel sensors.

The ABS control unit M050:

• from pins 16, 9 supplies the left K070 and right K071 front wheel sensors;
• from pins 6, 19 supplies the left K075 and right K076 rear wheel sensors;
• from pins 5, 10 receives the signals supplied by the left K070 and right K071 front wheel sensors;
• from pins 17, 8 receives the signals supplied by the left K075 and right K076 rear wheel sensors.

The ABS control unit M050 is connected to earth C012 at pins 1 and 4, while pin 11 is dedicated to the K line set aside for diagnosis See E8010 DIAGNOSTIC MULTIPLE CONNECTOR.

The body computer node, in the case of a fault signal received from the ABS control unit, via the B-CAN switches on the relevant warning light present on the instrument panel (for further details See E4010 INSTRUMENT PANEL ).

The D001 junction is housed, in the interior compartment, at the bottom of the front right pillar, near the door cable pass, passenger side.