ABS 5.3 and ABS/TC 5.3 Systems

Important information about ABS 5.3 and ABS/TC 5.3

General
The 911 Carrera (996) is fitted as standard with an antilock brake system (ABS 5.3). "Traction Control (TC)" is available on special request on the basis of ABS 5.3. Traction Control (TC) is a combination of Antislip 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. Control module (No. 1), hydraulic unit (No. 7), pump-motor relay and valve relay (No. 2) of ABS 5.3 and ABS/TC 5.3 form a unit that is located next to the brake master cylinder.
Diagnosis and system checks on both systems are carried out with the Porsche System Tester 2.

Differences between ABS 5.3 and ABS/TC 5.3
Refer to ABS 5.3 = 3-channel system.
Refer to ABS/TC 5.3 = 4-channel system.
The essential distinguishing features between ABS and ABS/TC are:
- Number of brake lines at intermediate piece (No. 8 / above):
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 light up when the ignition is switched on (lamp check). In vehicles with ABS 5.3 (Solo ABS) these lights are not fitted in the instrument cluster. A figure showing the warning lights and the function light is shown under Locations; Components.