I've not seen any posts relating to my specific washing machine (Fisher&Paykel - WA42T26GW1) and I'm needing some assistance.

Several days ago noticed small water leak under machine. Machine seemed to still be working through 2 or 3 more loads. After that the spin cycle quit working and also not draining after completing wash cycle. There is also a slight burning smell (maybe the wax valve in diverter?). Anyway, it seems to be acting strange (for example: I ran a test load and found the tub wouldn't drain. It would begin draining for a few seconds, then stop. A few minutes later it would drain for a few seconds, then stop. This went on for 20-30 minutes and only drained a small amount. We manually drained in order to do some trouble-shooting underneath.)

We tipped back the machine and checked for drain pump and diverter valve blockage. None found. Associated hoses appear clear also Also performed ohm resistance checks on valve and pump. No opens, no shorts. Values looked within normal range of other similar posts I've read for similar FP machines
I've been unsuccessful in locating schematic diagrams and/or detailed service manuals for this machine so I feel in the dark.
I'm wondering what to test/check for next.
Any suggestions?

p.s. I've read on other FP posts about a diagnostic mode. I have been unsuccessful in finding any information in regards to diagnostic mode for this model. Are all FP similar/same for diagnostic mode?