Honda Prelude 1993 Service Manual page 510

Possibl€ Cause
' Loose or falhy
connoction
b€tweon th€ TCM and car har_
ness.
' Disconn€ct6d count6rshatt
gpoed sonsoa connoctoa
' Shon or op€n in tho count6t_
shaft sp€ed senaor wire
' Fauhy countorshaft sp€€d son-
sot
S.ltdl.g|lorl!
| Da I lrdlcltor
lghtbtr*.nln.-il-m...
ls tho coumsGhaft sposd
s€nsor installed proporv?
Disconnsct th€ 2P connoctor
Irom tho count€rshaft spood
sensor connector,
Moasure th6 rosistanco of th6
countsrshaft sPeed s6nsor.
ls the r€sistance
400- 6@ o ?
(at 7OoF. 2OoC)
Disconnect tho 22P connoctor
from th€ TCM. Connoct the
Tost Hsrn6ss
"O" connoctoa
to th€ wir6 harnoss onlY, not
to tho TcM {14-3$.
Check for cottinuitY betwoon
body ground 8nd D17 torminsl
and D15 terminal individuslly.
R.o.l. rhort In BLU/GRN or
BLU/YEL wlr. b.tw..n
D17
lnd Dl5 tcrmlnaL and lh.
coumorrhaft apead tdrtor.
Roconn€ct th6 countershoft
sp6ed sensor connector.
Electrical Troubleshooting
Troubleshooting Flowchart (cont'd)
Cootl lty?
To pdss 1+/{)
14-48