Honda Civic Service Manual page 1214

L e
\
.t
CONDITION FOR DETECTION
MANAGEI\,4ENT
FEFER
TO
PAGE
D U N I N G
ABS CONTFOL
EXCEPT
ABS CONTAOL
19-60
1 9 - 6 2
The ABS indicator lighl cones on when vehicle is stopp€d and wheel sensor a given vohaqe does nol
1 9 6 4
The ABS indicaror comes on under th€lollowing conditions
. W h e n m o r e t h a n o n e o t w h e e l s a r e
a s t a n d s t i l a n d t h e l e l o c i r v o t t h e f a s t e s t w h e e l r e a c h e s a
' fohen th. velocity of the faslesl wheel reaches or exceds a given sped, and it there ar€ somewh@ls
whose velocity is slowe.lhan a cenain percenlage oi lh€ fast6t wheelsped for 3 given period
. when rhere are lemporary open or short ctcuits ol rhe wheel sonsor' chipp€d pulser gear, orsrgnal
o r s l J r b a a L e
1 9 6 4
The main relay repeats ON/OFF switching atalltimes
. W h e n t h e m a i n r e l a y i s O N , a s h o r t t $ t p u l s e i s s e n t l o e a c h v a l v e l f t h e r e s s o m e d i s ' r e p a n c v , l h e
A B S i n d i c a l o r l i g h t c o m e s o n .
. When rhe main relay is OFF, a shonl€sl pulse is s€nlto each valve lfth6 solenoid drive voltage rs
out ol a qiven range, the ABS ndicalor lighl comes on
19-66
'The pump nolot s activaled orc€ o' Mrce sfier every gn't'on sw'lch ON (ll) operarion whrle lte -^
v c h i c l e a c L e l e r a l e s l r e n t h e m o l o r o t i v e v o ' t a S e r s r h e c l e d W h e n l h e v o l l a 9 6 r s a b n o r m a r , l r e A b s
indicaror llghl comes on.
. Afte. ABS ;onl rol com pletion, the moror isswitched ofi 6nd the main CPU checks the molor dnve
voltase. when rhe vortase is abnormsl, the ABS indicato49!!!99!:l!:_-
19-68
D!rino an active motor lesl or AAS control,lhe main CPU checks ihe supplv voltage to the motor'
whe;lhe
vohage s abnofmal, the ABS indicator lightcomes on
19,68
lirhe moror drvevoltage indicates molot operalion when the main cPU does notswilch the motor
oN, rhe ABs indicaro. comes on
19-64
. Wh"" " ".1"".1d ""1r. f"llure is detecred, the CPU checksth€ voltage ofthe main rel6v output lllhe
vohaqe is lowerthan 6 given vohage, theABS indicator light comes on
. The ;ain r€lay repeats ON/OFF switching ar a!ltimss when the main rel.v is ofi, a shorl l6st pulse
is sent ro €ach valve. The CPU mon tors the reJer€nce vohage ll the vohage is out ot a g iven range'
the ABS indic.tor lightcomes on
1 9 7 1
wt'",, rt'e lgnitlon rottag" is ower or higherthan a given voltage,lhe CPU inhibils ABSlonlroland
swirches oli the ma in relaY, 6nd the ABS indicaror lig ht com€s on When the ig n ilion vohage recove's
t o n o r m a l f 6 n g 6 , A B S i n h i b i t i o n i s c a n c e l e d .
1 9 . 7 3
rimln
CpU anO suU CeU ch€ck each other undercertain condnions. Whon rhe CPUS dstectthe fol'
lowing discrepanaies, rhe ABS indicator light comss on
. whe; rh€re is discGpancv n lhacarculated wheelspeed velocirv thar continuosJor more than a given
.i^/hen rhere is discrcoancv in the ehase informalion lhat continuesfor morerhan a given period
' When rhere is discrepancY in thecalculared conlfol pa.amerer'
. When thewatch dog conrrolp!lsetailslof a given penod
. W h e n t h 6 c h e c k o t t h € R O M t a i 1 s .
. when there is disrepancy inrhe data roading.nd wriung prcledurc ot RAM
19 7'l
t r
1 9 - 5 9