Diagnosis / test plan (troubleshooting) for drive links · Further to MILs and information light Further to f

911 Carrera (996) Anti-lock brake system diagnosis Diagnosis / test plan (troubleshooting) for drive links Further to MILs and information light Further to front and rear ABS solenoid valves The corresponding MIL or information light (Maintain pressure and Reduce pressure) (depending on selection) does not flash. The function of the solenoid valvesor the On vehicleswith TC, the TC-OFFMIL also return pump is not OK. If a solenoid valve has flashes when the ABS MIL is activated. a mechanicalfault, the fault is not stored in the fault memory. Checkbulb. Hydraulicor electrical lines could be swapped. Check wiring from the instrumentcluster If a fault is stored in the fault memory, first to the control module according to the eliminate this fault. wiring diagram. Test step "Maintain pressure" not OK: -Brake pedal not pressed or not pressed at the right time.Further to the return pump Return pump does not run after activation. Electrical or hydraulic lines swapped if the activated wheel locks up (precondition: Perform troubleshooting analogous to test corresponding inlet valve activated with point 12 (diagnostic trouble code 4266) the F8 key). on Page 45 -D 30. Inletvalvefaulty. Test step "Reduce pressure" not OK: -Brake pedal not actuated. If the activated wheel does not alternately lock up and then rotate freely again but another wheel (precondition:the parking brake is not engaged and the selector lever of Tiptronic vehicles is in position "N"), the hydraulic lines are swapped. Outletvalve defective. 45 -D 37