Honda Prelude 1993 Service Manual page 368

Fuel Supply
PGM-Fl Main
Troubleshooting
System
Relay (cont'd
Flowchart
PGM-FI
MAIN
RELAY
NOTE:
. M/T: Clutch pedal must
be depressed.
a A/T: transmission in I n I
or [E position.
BLK @
BLK €) YEL €)
- Engino will not 3tan.
- InlDcction ot PGM-FI
rclay.
Check for continuitY between
BLK terminal @
and bodY
ground.
Ropair opon in 8LK wirc b6tw.en
PGM-FI main relay and GlOl {lo-
catod at th6amostot housing).
Measure the voltage between
YEL/BLU terminal O and bodv
gtouno.
- Roplace tho No. 4 BACK UP
{10 Al tu36 {in tho undordash
fu3o/rolay borl.
- Ropoir op6n in rho YEL/BLU
wire b€tweon tho NiM-Fl rnain
relay and ths No. 4 BACK uP
{10 Al lu8o.
ls there battery voltage?
Turn the ignition switch ON.
Measure the voltago between
BLK/YEL terminal @ and body
glouno,
- Roolaco th. ECU IECMI {15 A}
tuis {in tho und6r{eh
tut /ro-
lay boxl.
- R6pai opgn In tho BLK/YEK
wiro b€tween d|o FGM-FI tnein
r6laY and tho Ecu (ECM) {15
Al fu3e.
ls there battery voltage?
Turn the ignition swilch to the
START position.
Measure the voltage betw€en
BLU/RED terrninal @ and body
ground.
- Replaco lhc No. 2 STARTER
SIGNAL {7.5 A} furo lin tho
undor-dash f uso/ralay borl.
- B.p.ir op.n in tho BLU/RED
wiro b.twoon th6 FGM-FI rtain
r6lay .nd lh. ignition twitch
(sr).
ls there baltery voltage?
( T o p s g e I ' l - 1 2 9 )
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