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EFI SYSTEM
-
Troubleshooting
F1·
11
SYMPTOM
-
DIFFICULT TO START
OR
NO
START (CRANKS
OKI
CHECK DIAGNOSIS
SYSTEM
Diagnostic codelsl
Cheek for output of diagnostic
coda.
Malfunction
(See
page Fl·251
(See page Fl·221
codelsl
Normal
code
DOES ENGINE
START WITH
ISC
system
ACCELERATOR
PEDAL
DEPRESSED?
OK
Ill
ISC valve
121
Wiring connection
I
+
B ISC valve
ECU
NO
CHECK
FOR
VACUUM
LEAKS IN
AIR
1.
Oil
filler
cap
INTAKE
LINE
BAD
2.
011
level gauge
3.
Hoso
connections
4.
PCV hoses
5.
EGR
system
-
EGR valve stays open
OK
CHECK
IGNITION
SPARK
1.
Plug wires
1.
UnpJ
ug
connectors
of
injector
resi
stor
BAD
2.
High·tenslon
cords
and start injector
time
switch.
3
.
Distributor
2.
Check by holding spark
plug wire
B
-
10 mm 10.31
-
0.39 in. I away from
4.
Ignition
coil,
igniter
eng1
ne
block
while
engine is
c.
r
anking.
A strong spark should
be
noted.
OK
CHECK
IGNITION
TIMING
Adjust ignition
timing.
(See
page
10·91
1.
Short
both terminals of the
NO
check
connector.
2.
Check
Ignition
timing.
STO:
10°
BlOC
l
w
/
ohon t.,minab of the
cheek eonnoc:torl
OK
CHECK
FUEL SUPPLY TO
INJECTOR
1.
Fuel line
-
leakage
-
deformation
1.
Fuel
in
tank bad
BAD
2
.
Fuso
2.
Fuel
pressure
in
fuel
line
3.
Circuit opening relay
!See
pege Fl·89l
Ill Short
fuel pump check
terminals.
4.
Fuel
pump
ISee page Fl-441
121
Fuel pressure et fuel hose
of fuel
5.
Fuel filter
llltor can be
felt.
6.
Fuet
pressure
regulator
!See page
Fl-451
ISee
page
Fl·52l
OK
!CHECK FUEL
PUMP
SWITCH
IN
AIR
Air
flow
met
er
!See
page
Fl-581
FLOW
METER
BAD
Check contil'luity between
terminals
Fe and
e,
while
measuring
plate
of air flow meter
Is
open.
OK
CONTINUED
ON PAGE
F1·
12
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