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Wiper systems

Wiper systems


Windscreen wipers

General




1. Check that fuse 31 in the main fuse box in the dashboard is intact and live. M1995: Use the scan tool to check how the ICE module is programmed for the parked wiper position.

2. Plug in the scan tool and select "READ FAULT CODES" from the menu. If any trouble codes are present, continue on .

3. Check that a 12 V power supply is present between:


• windscreen wiper switch connector pin 6 and switch ground.

• windscreen wiper motor connector pin 5 and motor ground.

3 (contd.) relay holder position G, pins 86 and 87.

4. If no 12 V power supply is present as checked in point 3, check the wiring for breaks/shorting by taking readings between:


• fuse 31 and pin 6 of the windscreen wiper switch connector.

• fuse 31 and pin 5 of the windscreen wiper motor connector.

• relay holder position G, pins 86 and 87.


Intermittent wiper operation





1. Check the switch and position J for intermittent wiper operation by selecting "READ SWITCHES" from the scan tool menu and then "INTERM. WINDSC. WIPR".

Read the scan tool display when the switch is moved to the intermittent operation position.

Switch in position J - " ON "

Switch in position 0 - " OFF "

2. If this is not the case, check that a 12 V power supply is present on pin 10 of the switch when in position J.



3. If no power supply is present, change the switch. If a power supply is present, check the wiring between pin 39 of the ICE module connector and pin 10 of the switch connector.



4. To check intermittent wiper operation, select "ACTIVATE RELAY" on the scan tool and then "WINDSCREEN WIPER".


Intermittent wiper operation should be activated when the ignition switch is "ON". If it is not, check whether there is a power supply on pin 30 of the relay connector which changes between 0 V and 12 V when intermittent operation is activated. If there is no power supply, the fault is in the relay. Change the relay.

5. If a power supply is present, check the wiring between pin 30 of the relay holder and pin 9 of the switch for breaks/shorting.


6. Check that a 12 V power supply is present between:


• pin 8 of the switch and a good grounding point when the switch is in position J. If no power supply is present, fit a new switch.

• pin 3 of the windscreen wiper motor and a good grounding point when the switch is in position J.

• If no power supply is present, check the wiring between pin 8 of the switch connector and pin 3 of the windscreen wiper motor connector for breaks/shorting.

7. If intermittent wiper operation does not work after the above checks have been carried out, the fault is probably in the windscreen wiper motor. Change the wiper motor.

Important

The ICE module does not control the regular wiper system but only intermittent wiper operation.



Position 1 low speed





1. Check whether a 12 V power supply is present on pin 8 of the switch connector when the switch is in position I.

If it is not, fit a new switch.

2. Check whether a 12 V power supply is present between pin 3 of the wiper motor connector and a good grounding point.


If not, check the wiring between pin 8 of the switch connector and pin 3 of the wiper motor connector for breaks/shorting.

3. If the windscreen wiper does not work after the above checks have been carried out, the fault is probably in the motor. Change the wiper motor.

Important

The ICE module does not control the regular wiper system but only intermittent wiper operation.



Position 2 high speed





1. Check whether a 12 V power supply is present on pin 7 of the switch connector when the switch is in position II.

If it is not, fit a new switch.

2. Check whether a 12 V power supply is present between pin 4 of the wiper motor connector and a good grounding point.



If not, check the wiring between pin 7 of the switch connector and pin 4 of the wiper motor connector for breaks/shorting.

3. If the windscreen wiper does not work after the above checks have been carried out, the fault is probably in the motor. Change the wiper motor.


Windscreen washing with intermittent operation






1. Read the scan tool display when the switch is moved to the wash position, i.e. towards the steering wheel rim. Read the scan tool display when the switch is moved to the wash position, i.e. towards the steering wheel rim.

Switch in position P - " ON "

Switch in position 0 - " OFF "

If this is not the case, check that a 12 V power supply is present on pin 5 of the switch when in position P. If no power supply is present, change the switch.






2. Check whether a 12 V power supply is present on:


• the washer pump's (+) terminal when the switch is in position P.

• If not, check the wiring between pin 5 of the switch and the washer pump's (+) terminal for breaks/shorting.

3. For further information about checking the washer hoses, see Service Manual 3:1 "Electrical system".

4. If the windscreen washer system does not work after the above checks have been carried out, the fault is probably in the washer pump. Change the pump.


Headlamp wash/wipe system



General




1. Check that fuses 10 and 31 are intact and live.

2. Check that a 12 V power supply is present on:


• pin 6 of the windscreen wiper switch connector.

• pin 3 of the headlamp wiper motor connector (parking circuit).

3. Check the grounding by taking a reading across pin 1 of the headlamp wiper motor connector and a good grounding point. The resistance should be < 1 ohm.


3 (contd.) If point 2 is not correct, check the wiring harness for breaks/shorting.

4. Check the switch and headlamp wash/wipe position P as in point 3 on the previous page under "Windscreen washing with intermittent operation".


5. Check whether a 12 V power supply is present on pin 2 of the headlamp wiper motor connector when the switch is in position P.


If not, check the wiring between pin 5 of the switch connector and pin 2 of the headlamp wiper motor connector for breaks/shorting.

6. For further information about checking the washer hoses, see Service Manual 3:1 "Electrical system".

7. If the headlamp wiper system does not work after the above checks have been carried out, the fault is probably in the headlamp wiper motors. Change the motor or motors that do not work.


Rear window wiper


General




1. Check that fuse 8 is intact and live.

2. Plug in the scan tool and select "READ FAULT CODES" from the menu. If any trouble codes are present, continue on .

3. Check whether a 12 V power supply is present on:


• pin 3 of the switch connector.

• pins 86 and 87 of the connector for the rear intermittent operation relay holder.

• pin 3 of the rear wiper motor connector.

• If no power supply is present, check the wiring for breaks/shorting.

4. Check the grounding by taking a reading between pin 1 of the rear window wiper connector and a good grounding point.






Rear wiper, intermittent operation





1. Check the switch and the ON position for intermittent operation of the rear window wiper by selecting "READ SWITCHES" from the scan tool menu and then "INTERM. REARW. WIPER".

Read the scan tool display when the switch is moved to the intermittent operation position.

Switch in ON position - " ON "

Switch in OFF position - " OFF "

If this is not the case, check that a 12 V power supply is present on pin 2 of the switch when in the ON position. If no power supply is present, change the windscreen wiper switch.


If a power supply is present, check the wiring between pin 15 of the ICE module connector and pin 2 of the switch connector.





2. To check intermittent operation of the rear window wiper, select "ACTIVATE RELAY" on the scan tool and then "REAR WINDOW WIPE".

The rear window wiper should be activated when the ignition switch is "ON".


If it is not, check whether the power supply on pin 2 of the rear window wiper motor connector changes between 0 V and 12 V when the switch is in the ON position.


If not, check the wiring between pin 30 of the connector for the rear intermittent operation relay holder and pin 2 of the rear window wiper motor connector for breaks/shorting.


3. If intermittent operation of the rear window wiper does not work after the above checks have been carried out, the fault is probably in the rear window wiper motor. Change the wiper motor.


Rear window washer




Note

If the motor can be heard running but no water reaches the window, check that there is washer fluid in the reservoir. If the motor can be heard running but no water reaches the window, check that there is washer fluid in the reservoir.



1. Check the switch and position B for the rear window washer by selecting "READ SWITCHES" from the scan tool menu and then "REAR WINDOW WIPE".

Read the scan tool display when the switch is moved to the wash position, i.e. switch pressed (spring-loaded).

Switch pressed - " ON "

Switch not pressed - " OFF "

2. If this is not the case, connect a jumper lead between pins 2 and 3 on the connector and repeat point 1.


If the rear window washer works, the fault is in the switch. Change the switch.

3. If it does not work, check the wiring between pin 62 of the ICE module connector and pin 4 of the switch connector for breaks/shorting.


4. Check whether a 12 V power supply is present on the washer pump's (+) terminal when the switch is pressed.


If no power supply is present, check the wiring between pin 4 of the switch connector and the washer pump's (+) terminal for breaks/shorting.


5. If the rear window washer does not work after the above checks have been carried out, the fault is probably in the rear window washer pump. Change the washer pump.