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.
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2. |
Plug in the scan tool and select "READ FAULT CODES" from the menu. If any trouble codes are present, continue on
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3. |
Check that a 12 V power supply is present between:
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windscreen wiper switch connector pin 6 and switch ground.
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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:
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fuse 31 and pin 6 of the windscreen wiper switch connector.
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fuse 31 and pin 5 of the windscreen wiper motor connector.
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relay holder position G, pins 86 and 87.
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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.
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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.
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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.
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6. |
Check that a 12 V power supply is present between:
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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.
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pin 3 of the windscreen wiper motor and a good grounding point when the switch is in position J.
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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.
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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.
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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. |
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.
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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. |
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.
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Windscreen washing with intermittent operation
2. |
Check whether a 12 V power supply is present on:
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the washer pump's (+) terminal when the switch is in position P.
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If not, check the wiring between pin 5 of the switch and the washer pump's (+) terminal for breaks/shorting.
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3. |
For further information about checking the washer hoses, see Service Manual 3:1 "Electrical system".
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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.
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Headlamp wash/wipe system |
General
1. |
Check that fuses 10 and 31 are intact and live.
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2. |
Check that a 12 V power supply is present on:
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pin 6 of the windscreen wiper switch connector.
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pin 3 of the headlamp wiper motor connector (parking circuit).
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4. |
Check the switch and headlamp wash/wipe position P as in point 3 on the previous page under "Windscreen washing with intermittent operation".
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6. |
For further information about checking the washer hoses, see Service Manual 3:1 "Electrical system".
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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.
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Rear window wiper |
General
1. |
Check that fuse 8 is intact and live.
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2. |
Plug in the scan tool and select "READ FAULT CODES" from the menu. If any trouble codes are present, continue on
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3. |
Check whether a 12 V power supply is present on:
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pin 3 of the switch connector.
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pins 86 and 87 of the connector for the rear intermittent operation relay holder.
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pin 3 of the rear wiper motor connector.
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If no power supply is present, check the wiring for breaks/shorting.
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4. |
Check the grounding by taking a reading between pin 1 of the rear window wiper connector and a good grounding point.
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Rear wiper, intermittent operation
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.
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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.
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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.
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