ABS/TC 5.3 (4-Channel System) System Description

ABS/TC 5.3 (4-channel system) system description

Note

Traction Control (TC) represents an extension of the ABS system and is a combination of anti-slip control (ASR) and Automatic Brake Differential (ABD).

TC prevents spinning of the drive wheels when moving off and accelerating. Driving stability and traction are improved over the entire speed range.

Traction Control (TC) is ready for operation whenever the engine is started.

The TC information lamp in the instrument panel is lit during a control process and warns that the driving style must be matched to road conditions.

Function

Driving stability control:
If Traction Control (TC) detects that a certain speed difference between the wheels has been exceeded (wheelspin), engine power is automatically reduced.

Brake control:
In addition to reducing the engine power (driving stability control), the TC (via the ABD) brakes the drive wheel that is spinning.
Since this control requires the drive wheels to be individually controlled, the ABS/TC system is a 4-channel system.

Switching off driving stability control *

Press the "TC OFF" logo of the rocker switch. Driving stability control cannot be switched off during a TC control process (information light on).

One-sided wheel speed on the drive axle is further prevented by brake control up to a speed of 100 km/h.
Driving stability is not monitored, since the drive wheels can start to spin at the same speed (slip).

With driving stability control switched off, the TC MIL in the instrument panel and the indicator light in the rocker switch are lit.

It can be advantageous to switch off driving stability control:
- on a loose surface and in deep snow
- when "rocking" the vehicle free
- when using snow chains.

Switching driving stability control back on *

Press the indicator light in the rocker switch.

Driving stability control cannot be switched on again during a TC control process (information light on).

* Press the switch for at least 0.1 second. Then a further 0.3 seconds will pass until the routine is complete. Only then is driving stability control switched off or on.

Diagram: ABS/TC 5.3 (4-channel system)