Honda Prelude 1993 Service Manual page 305

Check lor continuity to body
ground on telminals C and D ot
the HO2S.
Check foi continuity between ter-
minalD and terminals A and B in-
dividually.
Turn the ignition switch ON.
At HO25 harness, measure vol,
tage between YEL/BLK {+ I termi-
nal and ORNMHT {- ) terminat.
Disconnect the "A" connector
from the ECM.
ls there battery voltage?
Meosure voltage bstween YEL/
B L K ( + l
r e . m i n a l a n d b o d y
ground.
At HO25 harness, measure vol-
tage between YEL/BLK (+ )termi
nal and ORN/WHT (- ) teiminal.
Repair 3hon in ORf{/
WHT wire botwoen
ECM (A6l and HO2S.
ls there battery voltage?
Ropair opon in YEL/BLK
wiro botwoon HO2S
and PGM-FI msin rolav.
Turn the ignirion switch OFF.
Reconnect the HO25 connector.
1 1 - 5 8 )
YES
H23A1 engino
IUSA: Si/Canada: SRl.
H22Al ongino
(USA: Si VTEC/Canada: SB-V):
F22A1 ongine (S):
HO2S
45 N.m
{4,5 kg-m, 33 tb-ftl
{cont'd}
HO2S
45 N.m
(4.5 kg-m,
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