Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove diverter valve motor from manifold
Remove electrical connector from diverter valve motor

Measurement:

Measure for resistance across diverter valve motor connections as per table below;
DV motor connectionsResistance in Ohms (approximately)
2 & 1240
2 & 3240
2 & 4240
2 & 6240

Note:
Ensure a good connection is made or misdiagnosis will occur.