Diagnostic procedure

WARNING: This page is about a different car, the 2001 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

The diagnostic trouble code is generated if there is an internal malfunction in the relay or if ground is missing on pin 5 in the relay base.

Check ground for pin 5 in relay base.
Try replacing the fifth bow latch relay with, for example, the relay for the right front window.
Activate the relay with the button for the right front window on the center console.
The latch motor should lock or unlock the fifth bow.
If the fifth bow locks or unlocks, the problem is likely in the latch relay