Traction Control System V6

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WIRING DIAGRAM

Traction Control System V6: Component Location:

COMPONENT LOCATION VIEW

Traction Control System V6: Component ID:

COMPONENT ID
22A Fuse board behind the cover flap in the glove box.
29 Brake light switch beside the brake pedal.

In The Main Instrument Display Panel
47Y TCS OFF indicator lamp.
47X TCS indicator lamp
159 Distribution terminal (+15 circuit) in main fuse box behind the glove box cover flap.
230 Distribution terminal (+30 circuit) in main fuse box behind the glove box cover flap.'
291 ABS control module on the battery tray.
348 Scan tool diagnostics data link connector under the right-hand seat.
(H10-9)
449 TCS ON/OFF switch in the dashboard.
450 TTS actuator motor on the throttle body.
507 TCS control module, V6, under left-hand seat.
508 Cruise Control system control module, adjacent to the battery tray.
510 Motronic 2.8.1 control module, in engine bay behind the bulkhead partition.

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-hand side.
G8 Grounding point, on the stiffening member under the left-hand loudspeaker grille.
G24 Grounding point, on the right-hand front seat member.

DESCRIPTION OF OPERATION
The TCS system is used on cars equipped with the Motronic 2.8.1 engine management system. 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
^ ABS control module 291
^ Motronic 2.8.1 control module 510
^ Actuator motor 450
^ TCS ON/OFF Switch 449
^ Brake light switch 29
^ Data link connector 348

Control Module Outputs
^ Actuator motor 450
^ Cruise Control 508
^ Main instrument display panel 47
^ Motronic 2.8.1 control module 510
^ Data link connector 348

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.

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 receives data on the position of the butterfly valve from the position sensor, which is integrated into the motor module, via connection 27.

Actuator motor 415
The TCS throttle butterfly actuator motor is supplied with current via pins 18 and 35.

Wheel Speed Information
To determine whether wheel spin is occurring on any of the drive 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 information is therefore also supplied to the TCS control module.

Engine Speed
Information about the engine speed is obtained from the Motronic control module. This is used by the control module, together with information about the positions of the main and TCS throttles, 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 disconnects the Cruise Control system.

TCS ON/OFF Switch 449
When the switch is activated, the TCS system will be disconnected as long as vehicle speed is below 60 km/h. TCS OFF indicator lamp 47Y lights up. The TCS function can be reconnected at any speed.

The TCS function is automatically activated when the ignition switch is turned to the Drive position from the OFF position.

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

TCS OFF Warning Lamp
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.