Test point 15 · Undervoltage Control module supply voltage too low (less than 9.5 V).

Test point 15 Undervoltage Control module supply voltage too low (less than 9.5 V). DTC 4802 Normally, this fault occurs only when the engine is started in combinationwith a dischargedbattery. 1. Pull off the control module connector and measure the voltage between PIN 15 (plus)and PIN 19 (ground). Nominal value: Vehicle voltage. 2. Check wiring and ground point in combinationwith the wiring diagram. Test point 16 Intake valve The complete hydraulic unit must be replaced if the intake valve DTC 5260 is damaged. In the intake valve test with the Porsche SystemTester 2, select Intake valve in the Drive links menu. Perform the test according to the Tester instructions. If the functions specified in the Tester display: Rear axle locked up / Rear axle still locked / Release(rear axle free) are not achieved,the following faults are possible: 1. Test sequence not observed. 2. ABD secondary circuit poorly bled. Bleeding:see Page 45 -D 43, 3. Functionof the intakevalvenot OK. 4. Return pump operation not OK. Check pump operation. To do this, select return pump in the Drive links menu (pump must then run). 5. Intake or switch-overvalve leaks. 45 -D 32..