| | Test results |
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
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| First of all check the level of the detergent fluid in the reservoir and also make sure that it is not leaking | Move on to Step 1 | 1. Insufficient detergent fluid level.2. Detergent fluid reservoir damaged. | 1. Restore the correct level.Op. 5050A14 RESERVOIR PLUG (IN ENGINE COMPARTMENT) OR WINDSCREEN WASHER FLUID LEVEL SENSOR - CHECK AND TOP UP IF NECESSARY2. Replace the reservoir Op. 5050A10 WINDSCREEN WASHER FLUID RESERVOIR (IN ENGINE COMPARTMENT) - R+R |
| 1 | PIPE AND JET CHECK | All OK | Problems encountered | Operation |
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| Check that there are no obstructions in the rearscreen washer pipes and that they are not incorrectly connected.Check the condition of the jet. | Move on to Step 2 | 1. Pipes blocked or damaged2. Jet obstructed or damaged. | 1. Repair or replace the pipes2. Repair or replace the jetOp. 5050C10 REAR WINDOW WASHER JET - R+R CLEAN AND/OR POSITION |
| 2 | REARSCREEN WASHER ELECTRIC PUMP POWER SUPPLY | All OK | Problems encountered | Operation |
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| Check the connection between the Body Computer and the rearscreen washer electric pump and between the Body Computer and the Steering column switch unit See E3021 REAR WINDOW WASH/WIPE | Move on to Step 3 | Connection broken. | Restore the correct connections See E3021 REAR WINDOW WASH/WIPE |
| 3 | REARSCREEN WASHER PUMP CHECK | All OK | Problems encountered | Operation |
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| Check the operation of the 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 4 | Pump faulty. | Replace the screen washer electric pump Op. 5050B22 FRONT AND REAR SCREEN WASHER PUMP - R+R |
| 4 | STEERING COLUMN SWITCH UNIT CHECK | All OK | Problems encountered | Operation |
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| Check that the switch unit is working properly: in particular, the rear wiper switch See descriptions 5550 WARNING AND MANOEUVRING INDICATORS | End of diagnosis | Stalk unit not working properly. | Replace the steering column switch unit.Op. 5550A12 |