Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove electrical connector to diverter actuator

Measurement:

Test 1:
Measure the resistance between terminals 1 and 2.
Expect approximately 6.1 - 8kOhms or greater.
Test 2:
Measure the resistance between terminal 2 and 3.
Expect approximately 6.1 - 8kOhms or greater.
Note:
You may encounter either type of diverter actuator but the expected readings and test points remain the same.