Subaru S209 2019 Service Manual page 66

INTAKE (INDUCTION)
3) Connect battery positive terminal to terminal No.
3 and battery ground terminal to terminal No. 4, and
measure the resistance between the intercooler
water spray relay terminals.
(1)
(2)
(2)
(3)
(3)
(4)
Terminal No.
1 and 2
Intercooler Water Spray Relay
(1)
(4)
1
2
3 4
FU-04077
Standard
Less than 1 
IN-36