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 plunger hydraulic 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 in accordance with Repair Instructions and renew defective parts if necessary
Nominal value not OK:
- Remove plunger hydraulic unit in accordance with Repair Instructions
- Ensure plug connections are firmly fitted and check for corrosion
- Check B+ supply wire from control unit connector (X11) Pin 17 to pressure sensor connector (X 18025) Pin 5 and repair if necessary
- Check pressure signal wire from control unit connector (X11) Pin 13 to pressure sensor connector (X 18025) Pin 1 and repair if necessary
- Check ground wire to pressure sensor connector (X 18025) Pin 2 and repair if necessary