Important information about ABS 5.3 and ABS/TC 5.3: Notes

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 Porsche Boxster, 2003 Porsche Boxster, 2002 Porsche Boxster, 2001 Porsche Boxster, and 2000 Porsche Boxster. However, it is still accessible from the selected car via links, so may be relevant.

General

The Porsche Boxster is fitted as standard with an anti-lock braking system (ABS 5.3). "Traction Control (TC)" can be obtained onspecial request on the basis of ABS 5.3. Traction Control (TC) is a combination of anti-slip control (ASR) and Automatic Brake Differential (ABD). TC is a further system for increasing driving safety.

ABS 5.3 is optimized with regard to installed volume and weight compared with the ABS 5 (ABS 5 in the 993 series). Control unit (No. 1), hydraulic unit (No. 7), pump-motor relay and valve relay (No. 2) of ABS 5.3 and ABS/TC 5.3 are a single unit that is positioned next to the brake master cylinder.

Fig 1: Identifying Anti-Lock Braking System Unit - ABS 5.3 And ABS/TC 5.3

Courtesy of PORSCHE OF NORTH AMERICA, INC.

Diagnosis and system checks on both systems are carried out with thePorsche System Tester 2.

Differences between ABS 5.3 and ABS/TC 5.3

ABS 5.3 = 3-channel system (diagram: see Figure ).

ABS/TC 5.3 = 4-channel system (diagram: see Figure ).

The essential distinguishing features between ABS and ABS/TC are:

Number of brake lines at intermediate piece (No. 8 / Figure 181 - 96): ABS 5.3 = 3 brake lines ABS/TC 5.3 = 4 brake lines
TC off switch for switching driving-stability control on and off is not available on vehicles with Solo ABS (ABS 5.3)
TC (ASR/ABD) warning light and TC (ASR/ABD) function light (information light) in vehicles with ABS/TC. These lights are lit when the ignition is switched on (lamp check). In vehicles with ABS 5.3 (Solo ABS) these lamps are not fitted in the instrument cluster. A figure showing the warning and function lights is located in Figure .