Shift solenoids S1, S2, S3, S4, S5
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Activating shift solenoids S1, S2, S3, S4, S5
"Clicking sound" in the transmission (use a stethoscope) and the status should change between OFF/ON.