Defect Code 17

Defect Code 17:

Explanation:

Plunger accumulator charging longer than 15 seconds or incorrect pressure signal

Possible cause:

Mechanical or hydraulic defect in plunger system
Short to ground or break on the pressure signal wire from the hydraulic plunger unit to the ABS/ASC+T control unit
Accumulator charging valve does not open
Pressure sensor defective

Troubleshooting:

Switch on ignition and measure voltage at the control unit connector (X11) Pin 13;
Nominal value: <1.5 V or >3.5 V;

Nominal value OK.:

- Visually inspect all hydraulic lines and connections, renew defective parts if necessary

- Check function of tandem hydraulic pump, and renew defective parts if necessary

Nominal value not OK.:

- Remove plunger hydraulic unit

- Ensure plug connections are firmly fitted and checked for corrosion

- Check B+ supply wire from control unit connector (X11) Pin 17 to pressure sensor connector (X16025) Pin 5 and repair if necessary

- Check pressure signal wire from control unit connector (X11) Pin 13 to pressure sensor connector (X18025) Pin 1 and repair if necessary

- Check ground wire to pressure sensor connector (X18025) Pin 2 and repair if necessary