His vehicle, which was purchased privately a few months ago, is a 2003 (series 5) 4WD diesel Bongo with a camper conversion. As Rick (Rocketeer) said in a previous post:
"Speedometer going crazy and hold light flashing. Turns out on the post-1999 Bongos, the speedo signal comes from the ABS system/front wheel via the transmission control module rather than from the speedo sensor on the back of the transfer box as with older Bongos."
Mackie Transmissions of Glasgow, one of the top auto gearbox specialists in Scotland, discussed the situation with Bongo experts Dunnings of Weymouth and came to the conclusion that the transmission control module chip was faulty. This is an extract from page 6600B on Lushprojects; the unit is drawing number 18-9EO.
The Mazda part number is WLF8189E1A.
Here at Bongo Fury Mission Control we tried to obtain the part from Mazda UK, Mazda Japan, and contacts in the Phillipines, only to be told that "this part is no longer available". Eventually we managed to source a used part from Japan, pictured below.
Mackies installed the part, but this did not fix the problem. It's possible (although in my view unlikely) that the replacement unit has the same fault. It has been sent for analysis to find out if this is the case. I have also asked Dmitri (DemonAV) to ask the Russian owners if they have come across this before.
In the mean time Rick has an expensive vehicle sitting in a garage that he can not use.
Has anyone got any ideas?
