Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove connector CN9 from the PCB
Disconnect the electrical connector from the diverter motor

Measurement:

Measure the resistance between each of the pins on CN9
and the diverter motor connector as listed below:
Connector CN9Diverter Motor Connector
Brown Pin 3
Blue Pin 2
BlackPin 1

Expect continuity / zero resistance on each test.
Also visually inspect the condition of the harness.