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.

There is communication on the VR-bus as long as there is +54 current. This DTC is generated if response is missing from the relay in question.

The cause of the problem could be power supply, grounding or that bus connection is missing.

Try moving the relay to the position for the right rear window.
Activate the relay with the button for the right front window on the center console.
Right rear window should raise or lower.
If the right rear window raises or lowers, the problem is most likely in the wiring harness.