The convertible top may not lower intermittently on some 2020-2021 Corvettes. DTC B19E4 (Hard Top Locked Closed Signal) SYM64 also may stored in history. SYM64 indicates that the folding top control module detects the signal circuit is invalid for greater than 1 second.
To correct the intermittent convertible top operation, align the hall effect sensor in the right-side front latch striker. (Fig. 5)
Fig. 5
The hall effect sensor (Fig. 6, #2) looks for the convertible top to be fully latched at the header. The hook of the latch striker may not be extending far enough to reach the magnet. (Fig. 6, #1) The front latch striker should be adjusted so that it latches completely.
Fig. 6
TIP: The windshield upper garnish molding must be removed completely to adjust the latch striker. Removing fasteners on only one side and flexing the molding may damage the part.
To make the adjustment, mark the location of the outboard bolt washer on the right front latch striker. (Fig. 7)
Fig. 7
Next, loosen the two latch striker bolts and move the striker outboard 2 mm (0.08 in.). (Fig. 8) Keep the same fore/aft positioning.
Fig. 8
With the latch striker in place, tighten the bolts to specification. Check for the correct function of the convertible top and that the DTCs do not set.
For additional information, refer to Bulletin #21-NA-192.
– Thanks to Jeff Strausser
