Important information about ABS 5.3 and ABS/TC5.3 · General} Differences between

911 Carrera (996) Anti-lock brake system diagnosis Important information about ABS 5.3 and ABS/TC5.3 General} Differences between ABS 5.3 and ABS/TC 5.3 The 911 Carrera (996) is fitted as standard ABS 5.3 = 3-channelsystem with an anti~ock brake system (ABS 5.3). (diagram: see Page 45 -D 7). "Traction Control (TCr' can be obtained on special request on the basis of ABS 5.3. ABS(rC 5.3 = 4-channelsystem Traction Control (TC) is a combination of (diagram: see Page 45 -D 9). anti-slip control (ASR) and Automatic Brake Differential (ABD). The essentialdistinguishing features between TC is a further system for increasing ABS and ABSjTC are: driving safety. ABS 5.3 is optimised with regard to Number of brake lines at intermediatepiece installed volume and weight compared with (No. 8/ Figure 181_96): the ABS 5 (ABS 5 on the 993). Control module ABS 5.3 = 3 brake lines (No.1), hydraulic unit (No.7), pump motor relay ABS/TC 5.3 = 4 brake lines and valve relay (No.2) of ABS 5.3 and ABS/TC 5.3 are a unit that is positioned next to the master brake cylinder. TC OFFswitch for switching driving stability control on and off is not availableon vehicles with Solo ABS (ABS5.3). TC (ASRjABD) MIL and TC (ASRjABD) function light (informationlight) in vehicleswith 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 (MIL)and function lights is on Page 45 -D 10. 181_96 Diagnosis and system checks on both systems are carried out with the Porsche System Tester 2. 45 02 Diagnosis/troubleshooting 45 -D 5