Replacement, fifth bow locking motor
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SERVICE INFORMATION
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Bulletin Nbr:
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811-1759
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Date:
...........
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maj 1997
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Market:
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Se separat lista
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Replacement, fifth bow locking motor
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Saab 900 Cabriolet up to chassis number V7010305, inclusive.
On certain cars, the fifth bow latch motor can seize when the top is raised or lowered. This means that the top cannot be operated using the ROOF button.
If customers complain, the fifth bow latch motor should be changed as described in the following.
74 97 878, spare parts kit for replacement of latch motor.
Saab Automobile AB's service bulletins are intended for professional Saab service engineers only. Their purpose is to provide information about variations or to serve as guidance in carrying out the necessary corrective measures. Saab service engineers have the equipment, tools, safety regulations and know-how to do the work properly and safely. Do NOT assume that the service bulletin applies to your car or that your car has the variation described in it. Always contact your Saab garage to find out whether the information concerns your car.
© 1997 Saab Automobile AB. All rights reserved.
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SE
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1.
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Operate the top so that the fifth bow and tonneau cover are fully raised.
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2.
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Connect an ISAT scan tool and operate the fifth bow latch motor to the half-open position (tonneau cover twist catch in half-open position) using the ISAT commands:
“TSAS”
“ACTIVATE”
“LATCH MOTOR 5th BOW”
“UP”
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Important
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This cannot be done unless you have previously changed the control module as described in SI 812-1566.
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3.
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Protect the rear wings and boot lid. Insert the protector under the tonneau cover as the motor can easily drop onto the boot lid.
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4.
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Remove the covering shell.
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5.
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Remove the locking rods.
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6.
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Cut the cable tie holding the wiring harness and separate the connector.
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7.
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Remove the four latch motor retaining bolts and lift out the motor.
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8.
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Separate the microswitch connector on the left-hand locking mechanism. Cut the cable tie.
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9.
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Remove the two locking mechanisms for the fifth bow and place them on a workbench.
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Important
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It is extremely important to change the lock washers.
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10.
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Undo the screws securing the microswitch and remove it.
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11.
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Remove the lock washers by bending them up and cutting them with pliers.
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12.
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Remove the pins and take out the locking tab. Be careful not to lose the 4 plastic washers.
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13.
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Fit the new locking tab. First insert the two plastic pins in the holder with two elongated holes and fit two plastic washers on them. Then add the locking tab followed by two plastic washers. Finally add the outer holder and fit the lock washers.
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Note
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The washers do not have fixed positions after fitting.
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14.
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Screw the microswitch to the holder on the left-hand locking mechanism.
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15.
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Mount the locking mechanism on the tonneau cover. Ensure that the pin on the locking tab lies against the wire guides for the tonneau cover's access flaps.
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16.
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Plug the connector into the microswitch. Fit a new cable tie.
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17.
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Connect the cable in the parts kit to the new motor.
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18.
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Place the motor on the tonneau cover. Run the cable behind the motor's holder and out towards the left-hand side of the car.
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19.
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Fit the motor and screw the collision cables to the top bolts of the motor bracket.
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Note
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The cables should run parallel with the aluminium member.
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20.
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Connect the motor's wiring to the car's wiring harness and fit a new cable tie around the connector.
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21.
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Adjust the length of the locking rods so that they measure
from the centre of the hole for the locking pin to the centre at the other end.
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22.
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Fit the new locking rods. Use both the old and the new lock washers.
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23.
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Operate the fifth bow latch motor to the open position (tonneau cover twist catch in open position) using the ISAT commands:
“TSAS”
“ACTIVATE”
“LATCH MOTOR 5th BOW”
“UP”
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24.
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Check the locking tab in the elongated holes for the fifth bow latch. Max. 1.5 mm of the locking tab should be visible.
If the adjustment is incorrect and more than 1.5 mm of the locking tab is visible, continue with points 25, 26 and 27.
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25.
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Operate the fifth bow latch motor to the closed position using the ISAT commands:
“TSAS”
“ACTIVATE”
“LATCH MOTOR 5th BOW”
“DOWN”
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26.
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Adjust the locking rods by turning them to make them longer.
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27.
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Repeat points 23 and 24. Then connect the ISAT scan tool and clear any diagnostic trouble codes. Remove the ISAT scan tool.
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28.
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Raise and lower the top 3 times. Check its operation.
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29.
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Fit the two threaded inserts. They are to be fitted in the holes above the fifth bow latch motor. Use Torx bolts and screw them into the holes. Tighten to 3-4 Nm (2.20 - 2.95 lbf ft) or until they bottom in the tonneau cover.
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Important
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On cars with chassis number V7003161 and later, these threaded inserts are already fitted.
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30.
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Check that the six clips securing the covering shell are correctly fitted.
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31.
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Attach the piece of foam plastic to the flat part at the upper end of the motor.
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Note
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Some cars produced before chassis number V7010305 already have a covering shell with a protuberance ready for the new fifth bow latch motor. If the car does not have this feature, carry out the modification described below.
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32.
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To mark the positions of the holes in the covering shell, put a spot of paint or a little grease on the end of the motor shaft.
Press the covering shell lightly into the clips. Using a bradawl, mark the positions of the 2 holes to be drilled for the threaded inserts.
Press the covering shell lightly over the motor to mark the position of the shaft.
Remove the covering shell and check that the marks match the diagram.
Drill two 6 mm holes for the threaded inserts.
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33.
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Use a 35 mm hole saw to cut a hole for the plastic plug.
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34.
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Deburr the hole and fit the plastic plug.
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35.
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Remove the protective paper from the tape and affix the tape to the covering shell. This prevents chafing marks made by the fifth bow.
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36.
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Fit the covering shell. First screw two new bolts into the threaded inserts and then the remaining two bolts. Press in the clips on the covering shell, starting from the centre.
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Standard time information
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Object code: 81130
Fault code: 26
Localization code: 09
Action code: 01
Time: 0.1 hours
Standard warranty conditions apply.
