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FUEL SYSTEM (PGM-FI)
MAIN RELAY CIRCUIT INSPECTION
1.
Power
Input
line
Ins
pection
Remove the main relay
(page
6-38),
Turn the ignition switch to ON
(I),
Measure the voltage between the White/red wire
terminals
(+l
of the main relay
(relay
box) con-
nector and ground H.
Is
there
battery voltage?
YES
- GO TO STEP 2.
NO
_
.
Open circuit
in
the
White/red
wire
between the relay box and fuse box.
•
Blown IGN
fuse
(10 A).
•
Open circuit in the Red/yellow or Red
wire between
the
fuse box and bat-
tery.
2.
Relay
Coil
Ground line
Inspection
MAIN RELAY CONNECTOR
(Terminal
side of the
relay
box)
White/red
(+)
v
.-+---{
v
\-' - ----L.----'
WhiteJred
(+)
Check for continuity between the Violet wire ler-
, -
-- - - - - - - - - - - - - -
--,
minal of the main
relay
(relay box) connector
and ground.
1
5
there
continuity?
YES
- The main relay circuits are normal.
NO
-
.
Open
circuit
in
the
Violet wire
between the relay box and PCM.
•
Faulty power/ground
line
of the PCM
(page 6-54)
•
Faulty
PCM.
FUEL PUMP RELAY CIRCUIT
INSPECTION
1.
Power Input line
Inspection
Remove the fuel pump relay (page 6-38).
Turn the
ignition switch to ON
(I).
Measure the voltage between the Black/yellow
wire
terminals
(+)
of the fuel pump relay (relay
box) connector and ground
(-).
Is
there
battery
voltage?
YES
-
GO
TO
STEP 2.
NO
_
.
Open circuit in the Black/yellow wire
between the
main relay
and
fuel
pump
relay
connectors.
•
Faulty main
relay
or its circuits.
2.
Relay
Coil
Ground line
Inspection
Turn
the
ignition switch to OFF (0).
MAIN
RELAY
CONNECTOR
(Terminal side of the relay box)
Q
Violet
FUEL
PUMP
RELAY CONNECTOR
(Terminal
side of
the relay
box)
Black/yel
low (+)
Blacklyellow
(+)
Check for continuity between the Gray/orange
FUEL
PUMP RELAY CONNECTOR
wire terminal of the fuel pump relay (relay box)
(Terminal side of the relay box)
connector and ground.
Turn the ignition switch to ON
(I),
Is there
continuity for about
2
seconds?
YES
- The fuel pump relay circuits are
normal.
NO
-
.
Open circuit in the Gray/orange wire
between the relay
box
and PCM.
•
Faulty power/ground line of the PCM
(page 6-54)
•
Faulty
PCM.
Q
Gray/orange
-==-
~'=-
6-39
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Table of Contents
Troubleshooting
