Seems like the 2005 Hatchback is not to be found on that site. It may look like the EPS circuits are slightly different from the other models. I thought all the Jazz's where Hatchbacks?
The English language manual is mostly about the 2002 pre-facelift model and there is one section missing, but the German / Dutch / Spanish / French language versions at
http://www.hondafitjazz.com/manual2/index.html may relate to the 2005 model more closely.
I would check the 6 pin torque sensor plug again, maybe one poor contact or a broken wire.
Pin > Colour > Function > Value
1 Red Sub
2 Not used / Keyway
3 Brown Signal Earth 0V
4 Blue Main
5 Yellow Vref 3.3V
6 White Vcc (5V or 12V ~not sure~)
- Grey/Blue Shield ground 0VIf it was something else like the EPS motor relay (under dashboard with EPS control unit) then a different diagnostic message would be given.
One other caution, the whole EPS steering rack has several part codes and it's shape has changed slightly between versions, if you are swapping it you may need an exact match to make it fit, although you may find you can just exchange the faulty part (i.e. torque sensor)
No need to change the main ECU, too many complications and does not control the EPS. The separate EPS control unit has talked to the diagnostic device so we can also assume that it is OK.
Where the manual says
'except HATC model' it does not mean HATChback but 'Honda Automotive Thailand Co'.
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TG
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