Honda NSA700A DN-1 2009, Service Manual

Page: 297 / 654

HFT TROUBLESHOOTING INFORMATION
GENERAL TROUBLESHOOTING
Interm ittent Failure
The term "in te rm itte n t fa ilu re " m e a n s a sys te m m ay h ave had a fa ilu re , b u t it checks O K n o w . If th e s h ift i n d i c a t o r d o e s
not come on, check fo r p o o r c o n ta c t o r lo o se pins at all co n n e c to rs re la te d to th e circuit th a t yo u a re tro u b le s h o o tin g . If th e
shift i n d i c a t o r w a s o n , b u t th e n w e n t o u t, th e o rig in a l p ro b le m m a y be in te rm itte n t.
Opens and S ho rts
"Opens" and "Shorts" a re c o m m o n electrical te rm s . A n o pen is a break in a w ire o r et a co n n e c tio n . A s h o rt is an accidental
connection o f a w ire to g ro u n d o r to a n o th e r w ire In s im p le e lectro nics, th is u s u a lly m e a n s s o m e th in g w ill n o t w o rk at all.
With ECMs this can s o m e tim e s m e a n s o m e th in g w o rks, b u t n o t th e w a y it's su pp o sed to.
If the shift in d ic a to r has c o m e on
Refer to DTC READOUT (page 11-23).
If the shift i n d i c a t o r d i d n o t s ta y on
If the shift i n d i c a t o r d i d not stay o n, b u t th e re is a d riv e a b ility p ro b le m , d o th e S Y M P T O M T R O U B L E S H O O T IN G (page
11-7).
SYSTEM DESCRIPTION
SELF-DIAGNOSIS S Y S T E M
The HFT system in clu d es a fa il-s a fe fu n c tio n to secure a m in im u m ru n n in g c a p a b ility even w h e n th e re is tro u b le in th e sys­
tem. W hen a n y a b n o rm a lity is d e te c te d by th e s e lf-d ia g n o s is fu n c tio n , ru n n in g c a p a b ility is secu red b y using n u m erical
values preset in advance in the program map. Il musl be remembered, however, that when any abnormality is detected in
the EOP sensor, N /D s o le n o id v a lv e , e n g in e sp eed in p u t line, T C M in p u t v o lta g e circuit, N /D select s w itc h , a n d /o r neutral oil
pressure sw itch, th e fa il-s a fe fu n c tio n stops th e e n g in e a n d shifts to n e u tra l to p re v e n t th e m o to rc y c le fro m a b ru p t a n d
unexpected m o v e m e n t.
DTC (Diagnostic T ro u b le C od e)
• The DTC is co m p o s e d o f a m a in c o d e an d a sub co de a n d it is d is p la y e d as a h y p h e n a te d n u m b e r w h e n re trie v e d fro m
the TCM w ith th e H D S p ocket tester.
The digits in fro n t o f th e h y p h e n a re th e m a in code, th e y in d ic a te th e c o m p o n e n t o f fu n c tio n fa ilu re .
The digits behind th e h y p h e n a re th e sub co de, th e y d e ta il th e specific s y m p to m o f th e c o m p o n e n t o r fu n c tio n failu re.
For exam p le, in th e case o f th e T P sensor:
- DTC 08 - 1 = (TP sen sor v o lta g e ) - (lo w e r th an th e s p ecified v a lu e )
- DTC 08 - 2 = (TP sen sor v o lta g e ) - (h ig h e r th an th e s p ecified v a lu e ).