Checking resistance
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.
Solenoids S1, S2, SL:
Measure resistance between pin in solenoid connector and transmission ground terminal.
The correct resistance should be: 12-16 Ω.
Solenoid STH:
Measure resistance between pins in solenoid connector.
The correct resistance should be: 3-5 Ω.