Honda Prelude 1993 Service Manual page 319

(F om p8O€ 11-741
(From page 1 1-74)
Repaii opon in GBN/
WHT wiro botwo6n
ECM (D221 End TP
30n3('t.
ls there 6pprox. 5 V?
Turn th6 ignition switch OFF.
Connoct th€ test harness b€tween
tho ECM snd connectors {see
p8ge 1 1-451.
Turn the ignition switch ON.
Measure voltage betwgen D2O
( + ) t e r m i n a l a n d D 2 2 { - )
terminal.
Rop.ir op.n in YEL/
WHT wlra bolwoon
ECM {D2O} a.|d TP
aonlot,
ls there aoo.ox. 5 V?
Subltltut. . known{ood ECM
.nd r.ch.ck. It piclcribcd voltage
i! now lvoilabl., rrphco tho orlgi-
n.l ECM.
o o o o o o o o o o o o o I o o o o o o o o E f f n f f i n S H F l
o o o o o o o o o o o
o o o o o o o o o o o o o I o o o o o o o o
o o o o o o o o o
Turn the ignition switch OFF.
Connoct the test hamess b9tw6€n
the ECM and connoctors ls€e
p a g e 1 1 ' 4 5 1 .
Turn the ignhion switch ON.
Measure voltago b€tween Dll
{ + ) t € r m i n a l a n d D 2 2 ( - ,
terminal.
ls voltago 0.5 V at full clos€
throttle, and approx.4.5 V 8t
full open throttls?
NOIE: There should be a
smooth transition from O.5 V
to approx. 4.5 V as the throttle
is depressgd.
Diaconngct the 22P connecto.
from th6 TCM.
ls voltage O.5 V at full clos6
throftls, and 4.5 V at full
open throttl€?
NOTE: Thero should be a
smooth transition from 0.5 V
to 4.5 V 8s the throftlo is
d€pressed.
- R o p l a c 6 t h e T P
lonaoa.
- Rapairopon oa rhon
in RED/BLK wiro be-
tw.€n ECM {Dl 11,
TCM and TP r.n!or.
Sub.litulc ! known-good ECM
.nd rochsck. lf symptom/lndic.-
tlon goat rway, ropl.c. the odgi-
nll ECM.
D 2 0 t + l D 2 2 l - l
t s v , J
0.5 V at tull close throttle?
4.5 V at lull open throttle?
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