Honda Prelude 1993 Service Manual page 324

Turn the igniition switch OFF.
- Roolocs lho lCM.
- Repair opon oi lhon in YEL/
GRN wir. botwo€n ICM lnd
ECM {A2l or A221.
ls th6ro approx. 10 V?
Substituto . known-good ECM
and roch.ck. lf symptom/lndic.-
tlon goos awsy, .oplaco th6 origi-
nal ECM.
ls the ignirion coil OK?
- Repsii opon in YEL wiro bo-
twoon tho 2P oonngcto. and
ignition coil,
- Ropaii opon in BLK|'EL wi.o
botwoon tho ignition coil ond
ignition $witch.
Reconnect the 2P connector.
Connect the test harness between
the ECM and connector (see page
1 1 - 4 5 ) .
Turn the ignition switch ON.
Measure voltage individually be-
t w e e n A 2 1 ( + ) , A 2 2 { + l t 6 r m i -
nals and A26 t-) terminal.
1O V? ---r
A 2 1 { + }
t-J
1 0 v ?
NOTE: lf the YEL/GRN wire was shorted.
the ICM may be damag6d.
o o o o o o o o o o o o
o o o o o o o o o o o o
A 22l+t 426 l-l
1 1 - 8 1