M130 with Race Grade TC8/CAN problems

I have a M130 with GPA package. On the CAN bus there is a Motec LTC and a Race Grade TC8 exhaust thermocouple module which is meant to emulate an E888 expander. Can anyone advise on settings in M1 tune? All I'm getting is CAN timeout messages for the thermocouples and for E888. The LTC works fine so I think my CAN bus is OK.