Honda Prelude 1993 Service Manual page 384

Intake
lntake
Air System
Air Bypass (lABl Gontrol System [Except F2241 engine {S}] (cont'd)-
Troubleshooting Flowchart
#13 VACUUM
HOSE
COI{TROL DIAP}IRAGM
/f
VACUUM
PUMP/GAUGE
A973X-O4t-XXXXX
IAB COI{TROL
SoLENO|O VATVE
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(To page 1 1-145)
In.poction ot IAB Control Sy.t.m
Stan ongino lnd allow to idl€.
Remove # 'l3 vacuum hose trom
the lAg control diaphragm €hd
connecl vacuum gauge to th6
nose,
Disconnect the 2P connector from
the IAB control sol€noid valve.
Measure voltagg between BLK/
YEL (+) terminal and PNK (-)
terminal.
Rcp.lr th. block.g. or
vlcuu|n lark bltwaan
lh. intlk€ m.ntlold .nd
d!ph.!gm, it vrqrxn l!
OK, r.pl.c. the IAB
contrcl lolcnold vllva.
ls tho.o banory vohrgo ?
Matturu voh.ge b€twe€n BLK/
YEL (+) t.rmin.l
and bodv
gaouno,
R.p.lr op.r| in BLK|rEL
wlre bctwaon th! 2P
connaclor lnd ECU
IECMI (15 Al tur. {ln
tha undardrah lura/.c-
hy boxl.
13 there bancry vohage ?
Turn the €nrtion swilch OFF.
Pl{K
11-144
(To page 1 'l -145)