SC430 - 2nd Gen (2001-2010)

convertible top not going down

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Old 04-23-18, 10:36 AM
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Jxlee0215
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Default convertible top not going down

My trunk opens, and right before the top begins to retract. It stops. It looks like it wants to release (moves a little). Can anyone give an idea where to start troubleshoooting from that point. I search the forums but got overwhelmed with all the info. Thx.
Old 04-23-18, 11:05 AM
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Bgw70
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Originally Posted by Jxlee0215
My trunk opens, and right before the top begins to retract. It stops. It looks like it wants to release (moves a little). Can anyone give an idea where to start troubleshoooting from that point. I search the forums but got overwhelmed with all the info. Thx.
you might want to check for any codes. They would be unique Toyota codes relating to the roof only.

i believe they begin with B
Old 04-23-18, 11:22 AM
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Originally Posted by Bgw70


you might want to check for any codes. They would be unique Toyota codes relating to the roof only.

i believe they begin with B
I just used techstream. there was no code error.

Last edited by Jxlee0215; 04-23-18 at 11:58 AM.
Old 04-23-18, 12:15 PM
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Bgw70
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Originally Posted by Jxlee0215
I just used techstream. there was no code error.
can you use TechStream to operate or test the roof?
Old 04-23-18, 12:27 PM
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Originally Posted by Bgw70


can you use TechStream to operate or test the roof?
is there a function to test the roof? I only pulled the data. there are values changed in red circle, but not sure if it means anything.


Old 04-23-18, 01:01 PM
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VVTiBob
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It’s an active test. Do not shut down the motor when scanning for trouble code. Next, is the tonneau cover properly seat in the trunk slots? Is the red open close light constant or flashing? Did the roof close correctly and completely the last time it was operated?


Last edited by VVTiBob; 04-23-18 at 01:05 PM.
Old 04-23-18, 01:04 PM
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Here is a list of the roof trouble codes: https://www.clublexus.com/forums/att...of-dtcs001.pdf

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Old 04-23-18, 01:28 PM
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Originally Posted by VVTiBob
It’s an active test. Do not shut down the motor when scanning for trouble code. Next, is the tonneau cover properly seat in the trunk slots? Is the red open close light constant or flashing? Did the roof close correctly and completely the last time it was operated?

just went to check again. think i had the engine off the first time, but nothing changed. active test is greyed out. the cover is seated. double checked. red light is constant. trunk open and closed fine. over a year ago.
here a pics.

Old 04-23-18, 01:54 PM
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So the sequence is
start the car
press and hold the open button
simultaneously the all windows go down and trunk opens up
left right A pillar latches release you should hear the motor retracting the latches
roof begins moving half way
pkg shelf moves up, wings rotate in
roof continues and stows in trunk
pkg shelf returns to starting position...

so whats not happening?

a guess, and it’s only that, is a limit switch in the left or right lock. But we should be getting a DTC.

Last edited by VVTiBob; 04-23-18 at 02:15 PM.
Old 04-23-18, 02:00 PM
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Originally Posted by VVTiBob
So the sequence is
start the car
press and hold the open button
simultaneously the all windows go down and trunk opens up
left right A pillar latches release you should hear the motor retracting the latches
roof begins moving half way
pkg shelf moves up, wings rotate in
roof continues and stows in trunk
pkg shelf returns to starting position...

so whats not happening?
I hear the latch release the roof. But it stops there. Moves about quarter inch (in the pic). Won't retract to the trunk. Sounds like the motor trying to pull the top back to the trunk, but it just won't go.
Old 04-23-18, 02:08 PM
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VVTiBob
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Have you checked the fuses tray in the luggage compartment? There are five 20a fuses.
Have you disconnected the battery for a few minutes to let the ECUs reset?

Last edited by VVTiBob; 04-23-18 at 02:17 PM.
Old 04-23-18, 02:20 PM
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Don’t keep doing the open and close sequence the motor can overheat and that in itself can cause an error and stop the roof, which is not a failure.
Old 04-23-18, 02:37 PM
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Also, need to know if the windows, all of moved open when you pressed the open button. Also, I wasn’t clear, scan for DTC codes with the key in the ON position, engine does not have to be running.

Last edited by VVTiBob; 04-23-18 at 02:45 PM.
Old 04-23-18, 02:50 PM
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Originally Posted by VVTiBob
Have you checked the fuses tray in the luggage compartment? There are five 20a fuses.
Have you disconnected the battery for a few minutes to let the ECUs reset?
I have reset the ecu. I will double check the fuse. Dtc codes were checked without engine on. Yes the windows works fine. Goes up and down with the button

Just check fuse. They're good.

Last edited by Jxlee0215; 04-23-18 at 02:58 PM.
Old 04-23-18, 03:01 PM
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Ok turn the key to ON and try running the roof with techstream running. Look for error codes. If it stops like it has been doing press the close button roof should relatch and all windows should go back up. Closely examine the “P-tray” fuse in the luggage JBox for hairline fracture.


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