I have a 1988 RR Classic with 200Tdi motor and 5 speed LT77s manual box with Borg Warner transfer box. The vehicle was originally fitted with the VM motor but the Tdi was retrofitted by the previous owner. I am thinking of fitting an auto box to replace the manual mainly as the vehicle is used...

There's a list?

Now that I have a properly functioning circuit again I can confirm that the sensor works like a switch which is closed = normal, open = error (not the other way round as shown by RAVE! and stated elsewhere). This would make sense so that when the sensor fails ie is no longer closed, an error...

Granted, but (stated elsewhere in several posts) overheat state closes the circuit to earth, activating error message. So, closed activates error, open activates error, range of values between open and closed, corresponding to gearbox oil temperature in normal range, gives no error. Question is...

I have finally got back to this problem after several weeks. And cracked it! I managed to trace the fault back to a break in the wire between the sensor connector (C164) and the plug into the BECM (C112). Some small furry animal escaped from the cave and decided to nibble on the wiring harness...

I agree that RAVE shows the sensor as a switch, which is open when normal and closed when fault condition occours. My concern with this is that with no sensor in circuit ie open circuit ie same as open switch, why does the message appear? I can only think that there is more to the little plastic...

Believe me, I have spent an inordinate amount of time in the last week or so poring over RAVE ETM and trawling the various fora for info.! If the sensor is a straight on/off switch, if it is taken out of circuit should this not then simulate an "off" position and the message disappear? I have...

Yes I know this is a common problem and there are several other posts on the subject, BUT I am pretty sure that my problem is a dodgy sensor and am looking for some additional info to confirm this before starting the process to import a new sensor from the UK (which is a real schlepp)...