Traction Control System V6

���(TCS (Traction Control System) V6:

WIRING DIAGRAM

TCS (Traction Control System) V6: Component Location:

COMPONENT LOCATION VIEW

TCS (Traction Control System) V6: Component ID:

COMPONENT ID
22a Fuse board behind the access panel in the glove box.
29 Brake light switch beside the brake pedal.

In The Main Instrument Display Panel
47x TCS indicator lamp
47y TCS OFF indicator lamp.
159 Distribution terminal (+15 circuit) in the main fuse box behind the glove box access panel.
230 Distribution terminal (+30 circuit) in the main fuse box behind the glove box access panel.
291 ABS control module on the battery tray.
415 TTS clutch actuator unit on the throttle body.
445 (H16-1) Diagnostics test socket, below the steering wheel.
449 TCS ON/OFF switch on the dashboard.
507 TCS control module, V6, under left-hand seat.
508 Cruise Control system control module, adjacent to the battery tray.
510 Motronic M2.8.1 control module, in the engine bay behind the bulkhead partition.
587 Motronic M5.2 control module on a bracket under the dashboard.

70-Pin Connector
H70-1 In the engine bay, behind the bulkhead partition.

Grounding Points
G5 Grounding point, under the rear seat on the left.
G8 Grounding point, on the stiffening member under the left-hand loudspeaker grille.

DESCRIPTION OF OPERATION
The Traction Control System (TCS) system is used on cars equipped with a V6 engine. It is also called the Twin Throttle System (TTS).

This system does not work by controlling the brakes but only by controlling the throttle butterfly valve.

The TCS system, which controls the anti-spin function, does it so smoothly and imperceptibly that the driver only notices that it is in operation by the TCS lamp lighting up in the main instrument display panel.

TCS Control Module 507
The control module handles traction control and regulates actuator motor 450. It is located under the right-hand front seat.

Control Module Inputs
^ Brake light switch 29
^ ABS control module 291
^ Data link connector 348
^ TCS ON/OFF switch 449
^ Actuator motor 450
^ Motronic M2.8.1 control module 510
^ Motronic M5.2 control module 587

Control Module Outputs
^ Main instrument display panel 47
^ Actuator motor 415
^ Data link connector 445
^ Cruise Control system 508
^ Motronic M2.8.1 control module 510
^ Motronic M5.2 control module 587

Power Supply
The TCS control module is supplied with battery positive voltage on pin 32 via fuse 21. This voltage supply is also used to power the actuator motor.

With the ignition switch in the Drive position, current (+15 circuit) is applied to pin 28 from distribution terminal 159.

Grounding
The control module is grounded via pins 13 and 30 at grounding point G5.

TCS Throttle Body
The TCS throttle body consists of housing, throttle butterfly, actuator motor and lever.

It is mounted after the conventional throttle body.

The control module obtains data on the position of the throttle butterfly valve from the position sensor, which is integrated into the motor module, via pin 27.

Actuator Motor 415
The TCS throttle butterfly actuator motor is supplied with current from pins 18 and 35 of the control module.

Wheel Speed Information
To determine whether wheelspin is occurring on any of the driven wheels, the control module obtains data on the speed of the front wheels from the ABS control module.

The speed of the rear wheels is used as a reference and this data is therefore also supplied to the TCS control module.

Engine speed
Information on the engine speed is obtained from the Motronic control module. This information is used by the control module, together with data on the positions of the main and TCS throttle positions, to calculate engine torque.

Brake Light Switch
When the brake is activated, battery positive voltage is applied to pin 23 of the control module which then disengages the Cruise Control system.

TCS ON/OFF Switch 449
When the switch is activated (ON), the TCS system will be disconnected as long as the speed of the car is below 60 km/h. TCS OFF indicator lamp 47y lights up. The Traction Control System can be turned on again at any desired speed.

The Traction Control System is automatically activated when the ignition switch is turned to the Drive position from the OFF position.

TCS Indicator Lamp 47x
The indicator lamp lights up when the TCS system is in operation.

TCS OFF Warning Lamp 47y
The warning lamp stays on continuously when there is a system fault or when the system has been manually deactivated with switch 449.

FAULT DIAGNOSIS HINTS
The ISAT scan tool is used for fault diagnosis and obtaining readouts of diagnostic trouble codes.