900 Convertible Top Troubleshooting Guide
Inoperative
Top/Operational Problems/Unsatisfactory Performance:
(Note that problems are listed in order of top operating sequence, beginning with top fully
raised)
1. Nothing happens when attempting to lower top (no movement at all,
no noises, etc.)
a. “ROOF” switch on center console defective?
Monitor switch with Tech 2, “Read Values/Roof Switch”. Tech 2 should re-
spond DOWN when you push the ROOF switch backward.
If Tech 2 does not respond correctly, check for power into switch at pin 10 of
the switch. Check for power at pin 4 of the switch pack and pin 42 of K42
when opening, and power at pin 3 of switch pack and pin 28 of K42 when clos-
ing. Check for continuity to ground at pin 8 12 of the switch pack. Replace
switch pack or repair wiring as needed.
b. Fuse blown? (If you cannot contact the TSAS system with Tech 2, you
may have a blown fuse.)
Check Maxi fuse
(underhood). Check fuse
circuit) and
circuit) in fuse box 22a at the end of the dash.
Replace fuse, determine cause of fuse blowing (short circuit to ground, etc.).
c. Trunk bag raised?
If SID is incorrectly programmed, when you attempt to lower the top with the
trunk stowage bag raised, nothing will happen, and SID will not display any
messages.
2. First bow raises a few inches and stops
Fifth bow latch motor stuck or inoperative?
If the car has the “older” design 5th bow latch motor, replace 5th bow latch
motor. See Ml 811-l 758. (From
new latch motor assemblies are
Factory installed.)
Use Tech 2 to
Bow Latch Motor”. If motor does not operate cor-
rectly, perform electrical tests there may be a wiring fault.
3. Fiffh bow raises all the way, then
fop stops other
movement
a. Header switches closed by dowel pin?
The first bow settles when the fifth bow is released. If the “top stops” are misad-
justed too loose, this allows the header pins to re-enter the header switches and
stop the top movement. This may happen before the 5th bow is all the way up. Note
that SID will also display “Check Latches” when this occurs. An easy way to check
for this condition is to raise the first bow with your hand when the top movement
stops. If the top movement continues, the stops need adjustment,
Adjust the top stops correctly. See page 130 of Service Manual
Re-
program according to PSI
