Test point 15
Undervoltage
DTC 4802
Control module supply voltage too low (less than 9.5 V).
Normally, this fault occurs only when the engine is started in combination with a discharged battery.
Pull off the control module connector and measure the voltage between PIN 15 (plus) and PIN 19 (ground).
Nominal value: Vehicle voltage.
- Check wiring and ground point in combination with the wiring diagram.
Test Point 16
Test point 16
Intake valve
DTC 5260
The complete hydraulic unit must be replaced if the intake valve is damaged.
In the intake valve test with the Porsche System Tester 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:
Test sequence not observed.
- Inadequate bleeding of ABD secondary circuit.
- Function of the intake valve not OK.
- Return pump operation not OK.
Check pump operation. To do this, select return pump in the Drive links menu (pump must then run).
- Intake or switch-over valve leaks.
Test Point 17
Test point 17
Switch-over valve
DTC 5265
The complete hydraulic unit must be replaced if the switch-over valve is damaged.
In the switch-over valve test with the Porsche System Tester 2, select switch-over valve in the Drive links menu and perform the test according to the
Tester instructions.
If the functions specified in the Tester display:
Rear axle locked up / Rear axle free are not achieved, the following faults are possible:
Brake not actuated at the start of the test
- Test sequence not observed
- Function of the switch-over valve not OK.
Test Point 18
Test point 18
Version coding
DTC 5281
Wrong version coding in the control module. Change coding.
The active transmission version (Tiptronic or manual transmission) can be read out under menu item "Extract coding".