Honda Prelude 1993 Service Manual page 509

14-47
Self-diagnoli3 | D4 Indlcator
light btnkr oight tlm.s,
Disconnect th€ 26P conn€ctor
trom the TCM.
Turn th6 ignition switch ON.
Measure the vohag€ b€tween
th6 43 (GRN/YEL) snd A25
(BLK/RED) or A26 (BRN/BLK)
lermanals.
Ropllr rhort to powar tource
In GRIIUYEI wlro botw..r th.
A3 termln.l and rhlfl coDtrol
lolenold vrlvo B.
Turn the ignition switch OFF.
Measure th€ resistance be^
tween the 43 (GRN/YEL) and
A25 (BLK/BEO) or A26 (BRll/
BLK)terminals.
Chack for bolo TCM conn.c-
to.r. It noco$ary. lubrtltuto
a known-good roLnold valvo
! r r e m b l y
o r T C M o n d
rachack.
ls th€ resistsnc6 12-24 O ?
Disconnsct the 3P connoctor
lrom the shift control solonoid
vave assembv.
Chsck tor continuity bstw€en
the 43 (GRi.i/YEL) and 425
(BLK/RED) or 426 {BRN/BLK)
t6rmrnals.
Rcpalr rhort to g.ound In GRN
/YEL wlr. b.twe.n lhe A3 ter-
mlnal and the lhift control
lolonold valvo B,
Measure th6 resistance of the
solenoid at th6 3P conn€ctor
(1+63).
Chock to. oD.n ln GFTUYEL
wl.g botwoon tho A3 tormlnal
and the lhlfl conlrol lolonold
vllvo B.
ls the rosistance 12-24 O ?
Replaca the 3hilt control
lolonold valvo a$amblv.
Possibh Cause
. Disconn€ctod shitt control
solenoid valv6 g connoctor
' Short or opsn in shift control
sol€noid valvo B wire
' Fauhy shift control solonoid
vslv€ B
NOTE:
View from t€rminalsid6.
(cont'd)