Question about 1990 Saab 900 Hatchback

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1998 saab convertible roof closing fault 2.3 900

I lower the roof on my car and the tonneau cover wont latch shut...ever.
I also have a problem with the roof when closing it too. The latches below the rear window wont lock the roof down initially, after a couple of attempts at closing it again, it will lock into place. I am thinking that perhaps there maybe a problem with a cable not being tensioned properly, although i dont know for sure. Happy christmas too.

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  • 76 Answers

There are numerous technical service bulletins issued for the top. The list with the full TSBs is here.

Posted on Dec 17, 2008

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Posted on Jan 02, 2017

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07 corvette top will retract but deck lid makes no effort to close, then top will not go back up. Need to release pressure in block lift top up about 1/4 of way then top will go back up


Manually Moving the Folding Top from the Down Position
Important: Allow the system a minimum of four minutes to bleed down pressure after the last cycle.
Manually release the folding top cover latch using the emergency release cable.
Raise the folding top stowage cover.
Manually raise the folding top, holding the 5 bow up.
Manually lower and latch the folding top stowage cover.
Manually unfold the top and latch per normal procedure.

Manually Moving the Folding Top from the Up Position
Important: Allow the system a minimum of four minutes to bleed down pressure after the last cycle.
Manually release header latch per normal operation.
Manually lift front of roof off of the header and raise the #5 bow at the same time.
Manually release the Folding Top Cover latch using the emergency release cable.
Fold the roof down into the well.
Manually close and latch the folding top stowage cover.

Power Folding Top System Components
The power folding top system consists of the following components:
• Folding top control (FTC) module
• Body control module (BCM)
• Folding top control switch
• Serial data communication
• Folding top cover latch actuator
• Folding top cover pull down actuator
• Folding top pump motor with valve manifold
• Position switches and limit switches:
- Pin receiver switch
- Luggage barrier switch
- Folding top cover open switch
- Top open switch
- Top closed switch
- 5 bow raised switch
- 5 bow lowered switch
• Tonneau release relay
• TONNEAU PULL DOWN ACTUATOR Fuse 20 A
• TONNEAU RELEASE Fuse 10 A
• BATT 2 Fuse 40 A
• REAR FOG/ALDL TOP SW Fuse 10 A
• Folding top mechanical components:
- Folding top
- Folding top cover
- Folding top valve 1
- Folding top valve 2
- Folding top valve 3
- Hydraulic lines and cylinders

Folding Top Cover Latch Actuator
The power folding top system includes a folding top cover that is powered open and close by a hydraulic system that is controlled by the FTC module. A power unlatch motor is used to unlatch the folding top cover before the folding top control (FTC) module powers the top cover open. The folding top cover unlatching is requested by the FTC module via class 2 message, but is executed by the body control module (BCM). When requested, the BCM applies battery voltage through the folding top cover release relay control circuit to the tonneau release relay. The relay is energized and battery voltage is applied through the folding top cover release control circuit to the latch actuator. The actuator is energized and the latch releases the folding top cover.

The electronics on this are very complex ,

System Operation
Before any movement of the power folding top is allowed, the folding top control (FTC) module must be aware of the following conditions:
• Unlatch the header. The FTC module reads the pin receiver switch is Inactive.
• The windows must be normalized. Refer to Power Window Reinitialization.
• The ignition must be placed in Accessory or RUN.
• The transmission must be placed in PARK, or with manual transmission, the park brake must be applied.
• Trunk status must not be ajar.
• The luggage barrier must be in place.
• The pump motor temperature must be within the operating range.

After the last cycle of power folding top operation, allow the hydraulic system a minimum of 4 minutes to bleed down before attempting manual operation of the top.
Your best bet take and have it checked for DTC'S - diagnostic trouble codes .
DTC B3666 Rear Tonneau Position Error
DTC B3667 Tonneau Release Circuit
DTC B1011
DTC B1291
DTC B1420
DTC B3602
DTC B3666
DTC B3667
DTC B3670
DTC B3971

Jan 23, 2017 | 2007 Chevrolet Corvette Convertible

1 Answer

My convertible top will not latch to the tonneau when up and the tonneau latch will not hook when down


Use a spray white grease and clean and lube all the moving parts of the top, all of them, then retry.

Aug 09, 2012 | 1996 Saab 900

2 Answers

Soft top fault


This needs to go to the dealer to have the systems control module scanned for fault codes during an "active" test cycle.

Jul 26, 2012 | 1996 Saab 900

1 Answer

I have a saab 93 1998,the power roof has just started to only open half way then decides to stop,if i gently push the roof it will complete its procedure,are there any sensors that may be playing up .?


Take a look at www.saabservices.com website, and click on convertible top issues.
There is a huge amount of stuff there, including diagnostics info at the bottom of the page.
The tonneau motor is the most common problem, and they sell them. Another possible issue is a bad 5th bow potentiometer. Good luck!

Apr 12, 2011 | 1998 Saab 900

1 Answer

My 96 900S Convertible won't operate, the main motor in right rear side of the trunk activates, but the bar that connects to the tonneau cover is twisted, as if the tonneau cover motors are cooked? Any...


You could check the top latch position sensor and convertible top control module....if the motors are fried replacing them is very expensive....

Aug 08, 2009 | 1996 Saab 900

1 Answer

SAAB 900 convertible 1995 - hood problem tonneau motor


I just went through HELL because my top would not go down! I did EVERY possible solution with NO AVAIL! So anyway, Im in the trunk and noticed a baggy sack hanging in the trunk.. So I figured it was for the roof.. Anyway the sack has 2 straps to hold it up for more room when the top is UP. So I said "I Wonder...." I released the straps and the bag hung again, and GUESS WHAT? Yea the roof works!!!!!!!!!!!!!

Jun 11, 2009 | 1998 Saab 900

2 Answers

I have a 1997 saab 900s convertible the other day when i attempted to put the roof down it wouldnt go down it kept displaying check soft top on the sid. i checked it all still it wouldnt go down so i...


In the trunk there are 2 sensors that are located in the back side of the cover where the bar with the springs are they mus of popped open just put a piece of tape thats what i did and so far so good. One question how do you get the top down buy hand? Cant figure it out.

Jun 06, 2009 | 1997 Saab 900

2 Answers

Electric roof wont work is the a manual way to opperate it ?


I don't know what you have tried so far but I recommend you check the fuses first. There should be one for the roof.

May 01, 2009 | 1996 Saab 900

1 Answer

Saab 93 convertible roof won't open


Your tonneau motor is probably bad, though reprogramming the limits may fix it. You will need the factory tool, unfortunately. There is a lot of information on this webpage. Be sure to read the information relating to updates on 1995 models.

Feb 22, 2009 | 1995 Saab 900

1 Answer

Saab roof starts to open but the lid dose not fully open to let the roof fold down


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.

Jul 21, 2008 | Saab 900 Cars & Trucks

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