Question about Saab 900
The 94-98 Saab 900 cars have numerous top issues that are known. The
primary issue is the design of the convertible top Tonneau motor that
is located in the right rear quarter panel behind the light. The
problem with the original motors was that there was not enough strength
in the housing that held the motor to support the top movement because
the teeth on the gear drive would get chewed up when the motor moved
out of position. The failure of the Tonneau motor causes the top to
chatter about half way up or down because the teeth of the motor gears
would get chipped off. Replacement of the gears or replacement of the
motor is the only repair and the convertible top Control module must be
programmed after the repair by someone with a Saab Tech 2 computer tool
which is used to program the top potentiometer settings. If you catch this problem early enough it can be repaired by using the bracket reinforcement kit.
Check latches is also a common failure which displays on the Saab Information Display (SID) Generally, this failure is due to problems with the micro-switch located in the latches that secure the convertible top when up.
Another issue with the convertible tops has been the control module that controls the top electronically. The major problem with this is device is that it looses the ability to communicate with the Saab tech 2 tools. This problem appears to have been solved in the newest versions of the ECM.
This TSB covers the known issues with NG 900 vert tops. There are numerous others for the 9-3 tops.
Posted on Dec 17, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
GMLAN communication to the Body Control Module (BCM)
Open/Close request circuit to the driver and passenger window motors
Power and Grounds
Folding Top Main Power Fuse 30A
Folding Top Logic Power Fuse 20A
Ground G301 for the FTC module and G305
Folding Top Open/Close Switch (S15 and S16)
Rear Compartment Limit Switches
Rear Compartment Lid Release Switch (S3 and S4)
Rear Compartment Lid Release Switch-Front Hinge-Left (S11 and S12)
Rear Compartment Lid Release Switch-Front Hinge-Right (S9 and S10)
Folding Top Front Location Pin Guide-Left (S17 and S18)
Rear Compartment Lid Release Switch-Left (S19A)
Rear Compartment Lid Release Switch-Right (S19B)
Rear Compartment Partition Position Switch (S20)
Folding Top Front Location Pin Position Switch (S13)
Folding Top Front Latch Actuator Position Switch (S14)
Hall Effect Sensors
Folding Top Header Latch Cylinder Sensor (S1)
Rear Compartment Cylinder Extended Sensor (S2)
DTC B367F 58: Roof Stowed Ready to Latch Sensor Circuit incorrect reaction after event
DTC B367F 59: Roof Stowed Ready to Latch Sensor Circuit circuit/component protection time out
DTC B367B 58: Deck Lid Anti-Rotation Latched Sensor Circuit incorrect reaction after event
DTC B367B 59: Deck Lid Anti-Rotation Latched Sensor Circuit circuit/component protection time out
Your best bet is probably to take your vehicle to a qualified repair shop.
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