Troubleshooting Guide - Honda Prelude 1993 Service Manual

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Troubleshooting
Troubleshooting Guide
NOTE: Across each row in the chart, the systems that could be sources of a symptom are ranked in the o.der they should
be inspected starting with O. Find the symptom in the left column, read across to the most likely source, then refer
to the page listed at the top of that column, It inspection shows the system is OK, try the next most lik€ly system O, etc,
*
lf codes other then those listed above are indicated, count the number of blinks again. It the MIL is in fact blinking
these codes, reDlace the ECM.
@ tt ttr" MIL is on while the engine is running, jump the service check connector. lf no code is displayed (MlL stays
on steady), the back-up system is in operation.
Substitute a known-good ECM and recheck. lf the indication goes away, replace the original ECM.
**
USA: Canada:
MALFUNCTTON
r-tr-
CHECK
'6+r-
;ND;CATOR
-[tglt-
ENGTNE ;t-\+:
LAMP {MILI
,
LIGHT
' * *
E x c e p t F 2 2 A 1 e n g i n e ( s )
engine (USA: Si VTEC/Canada: SR-V)
SYSTTM
at'iclNE
CONTROI
MOOULE
HEAIEO
OXYGEN
SENSOR
ABSOLUTE
PNESSUfiE
SENSOR
TOP DEAD CENIER/
POSITON/CYUNDES
POSftOt't sE|so8
TNGINC
COOTANT
fuiE sEt{sof
THNOTTLE
PO9TtOtl
sc soR
TEM.
FCi^TURE
SENSOR
EANOMEIRIC
PitssuSE
sfNsoR
IGNITON
OUTPUT
stcNA!
vtHtclE
SPfED
sE[son
50
56, 54, 62
64, 6a 70 7 6 7A
80
a2
MALFUNCTION INDICAIOR
LAMP IMIII" TURNS ON
n
o r - L l
.o:
:i6):
-mi
-r.tr-
:r6t:
/---\
:r6t1
/---\
-mi
rg:
lrm.t:
MAIFUNCTION INOICATOB
LAMP IMILl" BLIN(S
E o r E l
l l l
o r L l l
O or-8.o.:ft
- t r t -
. --i-
\
\.--l-
/ - t r t -
---'_-\
- t r t l -
/ __i-
\
- t t l t -
/'_-i-
\
\.--r-r /
-t 15 l-
/ ---i-
\
\.--1-,
-l t? t-
/ _--l-\
ENGINE WON'T STAFT
@
@
@
OIFFICUIT TO STAFT
ENGINE WHEN COID
IBU)
@
@
o
IDTING
WHEN COLO
FAST IDLE
OUT OF SPEC.
@ @
ROUGH IOLE
@
@
HIGH
@
a9
FREOUENT
STALLING
IBU)
@
@
ANCE
ROUGH
RUNNING
@
@
@
EMTSSTON
TEST
@
@ @
LOSS OF
@
@ @
11-40