Home/Saab/9-3/Saab 9-3 II (2002-2008)/Repair manual/Brakes - Tcs/esp/ABS function

Contents

Wiring diagrams Section: Brakes - Tcs/esp

The action involves the following

SPS programming

Add

Front wheel speed sensor (298FL, FR)

Rear wheel speed sensor (298RL, RR)

Hydraulic unit, TCS/ESP, all engines and control modules for B284 LHD

Yaw sensor (658)

To fit

Hydraulic unit, TCS/ESP, bracket

EBD (Electronic Brake-force Distribution)

CBC (Cornering Brake Control) in ESP

ABS (Anti-lock Braking System)

The ABS system assists the driver with regards to

TCS (Traction Control System) in TCS control module

TCS (Traction Control System) in ESP control module

ESP (Electronic Stability Program)

Self-check

Expanded function in ESP for B284

Function

Compression stroke

Return stroke

ABS mode

TCS and ESP mode in the ESP control module

CBC (Cornering Brake Control) in the ESP control module

CBC requires information regarding

CBC uses

ABS function

Braking force/Tyre slip

Lateral force/Tyre slip

ABS modulation

PHASE 1 Pressure increase

PHASE 2 Pressure holding

PHASE 3 Pressure decrease

PHASES 1-3

TCS function with TCS control module

TCS regulation

Low speed

High speed

TCS regulation with ESP system

Phase 1 Pressure build-up on both front wheels (filling pulse and holding pressure) The driver does not brake

Phase 2 Pressure increase in the circuit with wheelspin

Phase 3 Pressure reduction in the circuit with wheelspin

Phase 4 Release

On cars equipped with ESP

Braking

Phase 1 Pressure build-up for all four wheels (filling pulse and maintaining pressure). Driver does not brake

Phase 2 Pressure increase on wheels under ESP regulation

Phase 3 Pressure reduction on wheels under ESP regulation

Driver braking

Warnings and indicator lights

Main use

Type

Connection

Connection (not for control module)

Power supply, ground and bus communication

The control module contains

Valve block

Steering wheel angle sensor

TCS, bus information

ESP, bus information

Ignition Switch Module (20)

Main task

Connect

List of components

Brake light switch (29)

Wheel speed sensor, front left (298FL)

Wheel speed sensor, front right (298FR)

Wheel speed sensor, rear left (298RL)

Wheel speed sensor, rear right (298RR)

Relays

TCS control module (382)

Main instrument display panel (540)

SID (541)

ESP control module (671)

Infotainment control panel (736)

SID control panel (737)

Connector H10-4

Connector H24-1

Connector H33-1

Connector H102-1

Connected components

Control module, Trionic T8 (589)

EDC16 control module (595)

Scope

Remember

General

Bus

Control module

Outputs

Inputs

Procedures before dismantling the control module

Actions when replacing electrical components

Internal control module faults

Analog inputs

Digital inputs

Conditions

All sections

ABS function Saab 9-3 II

Brakes - Tcs/esp

ABS function

The ABS system provides optimum braking without any loss of directional stability.