Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove Connector X13 from the PCB
Remove diverter valve head from body

Measurement:

Test 1:
Measure the resistance between pin 1 and pin 3 of connector X13.
Test 2:
Measure the resistance between pin 2 and pin 3 of connector X13.
Resistances should be either approx. 6.0 kOhms or
greater than 1M Ohm depending on the motor position.