199002281 - J007 WINDSCREEN WASHER AND REAR WASHER DO NO WORK

The windscreen washer and rearscreen washer do not work properly when the lever in the steering column switch unit is operated.
The windscreen/rearscreen washer pump motor is the "two-way" type; depending on the command, set through the special lever on the steering column switch unit, the motor covers the windscreen or rearscreen washing funciton.
Test results
0PRELIMINARY CHECKAll OKProblems encounteredOperation
Check that the level of the detergent fluid in the expansion tank is correct, also make sure that it is not leakingMove on to Step 11. Insufficient detergent fluid level2. Expansion tank damaged1. Top up the detergent to the correct level.2. Remove the expansion tank    Op. 5050A10 WINDSCREEN WASHER FLUID RESERVOIR (IN ENGINE COMPARTMENT) - R+R
1PIPE CHECKAll OKProblems encounteredOperation
Check the condition of the pipes, in particular that they are not obstructed or incorrectly connectedMove on to Step 2Pipes obstructed or incorrectly connectedRestore connections correctly or replace pipes
2JETS CHECKAll OKProblems encounteredOperation
Check the condition of the jetsMove on to Step 31. Windscreen washer jets damaged2. Rearscreen washer jets damaged1. Replace the damaged jets    Op. 5050B10 FRONT WINDSCREEN WASHER JETS - R+R CLEAN AND/OR POSITION 2. Replace the damaged jets    Op. 5050C10 REAR WINDOW WASHER JET - R+R CLEAN AND/OR POSITION
3ELECTRICAL CIRCUIT CHECKAll OKProblems encounteredOperation
Disconnect the electrical connector, two-way electric pump motor side, and check for the presence of the control signal coming from the steering column switch unit    See E3020 WINDSCREEN WASH/WIPE Move on to Step 5No electrical signalMove on to Step 4
4ELECTRICAL CIRCUIT CHECKAll OKProblems encounteredOperation
Check the continuity/insulation of the electrical connection between the steering column switch unit and the two-way electric pump motor    See E3020 WINDSCREEN WASH/WIPE Move on to Step 5Connection broken or not insulatedRestore the continuity/insulation of the electrical connection    See E3020 WINDSCREEN WASH/WIPE
5WINDSCREEN/REARSCREEN ELECTRIC WASHER PUMP CHECKAll OKProblems encounteredOperation
Check the operation of the windscreen/rearscreen washer electric pump
It is the actual pump that carries out the screen washer function but operated in the reverse direction
Move on to Step 4Pump faultyReplace the screen washer electric pump    Op. 5050B22 FRONT AND REAR SCREEN WASHER PUMP - R+R
6STEERING COLUMN SWITCH UNIT CHECKAll OKProblems encounteredOperation
Check that the stalk unit is working properly: in particular the rearscreen wiper switch    See descriptions 5550 WARNING AND MANOEUVRING INDICATORS End of diagnosisStalk unit not working properlyReplace the steering column switch unit.    Op. 5550A10 STALK UNIT ASSEMBLY - R+R