Does anyone have a AW 30/40 service manual?

[BenL]

Hello, I've been geting a transmission code 143 which is :
"Oil temperature sensor circuit, open circuit"

The car drives fine aside from avery rare PNP switch problem, but my question is what causes this code(143) is anyone familiar with this or have the AW 30/40 fault tracing manual ?
Recently replaced the lockup selonoid, flushed trany.

Thanks in advance