Defect Code 19

Defect Code 19:

Explanation:

Plunger accumulator pressure too low or signal for plunger warning pressure threshold faulty

Possible cause:

Short to positive on the pressure signal wire from plunger hydraulic unit to the ABS/ASC+T control unit

Break or short to ground on the warning pressure signal wire from plunger hydraulic unit to the ABS/ASC+T control unit

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.:

- Remove plunger hydraulic unit.

- Ensure plug connections are firmly fitted and check for corrosion.

- Check warning pressure signal wire from control unit connector (X11) Pin 25 to pressure sensor connector (X18025) Pin 6 and repair if necessary.

Nominal value not OK.:

- Remove plunger hydraulic unit.

- 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 (X18025) 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.