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

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 .