Mazda 121 - Adjustment of Ignition Timing

SCHEDULED
MAINTENANCE
SERVICES
GND
/1.,"_(V
.:TS
r
,<--
ATUUSTMENT
OF
IGNITION
TIMING
Preparation
1. Warm up
the engine
to normal
operating
temperature.
2. Verily that
the wax
rod extends outward
fully
and
the idle
cam
separates
from the
roller.
3. Turn all
electric
loads OFF.
.
Blower
Fan
.
Headlight
.
Rear Window
Defroster
4. lvlake sure that
the engine
speed does
not change
when
disconnecting
the air bypass
solenoid
valve
@
connector'
Note
.
I the engine
speed
decreases,
the engine
is still u]}
der
the
warm-up condition.
5. lf the electric
cooling
fan is operating,
waittillthe
tan stops.
6. Verify thal
the engine
is running
at idle
in
good
condition.
7.
Connect
the SST
to
the diagnosis
connector.
8. Connect
a timing
light.
9. Connect
a tachometer
to
the diagnosis
connector lG-
ter'
minal as
shown.
10. Set switch
@
to
Position
1.
11. Set TEST SW
to SELF
TEST.
Note
.
lf the
SST is
not used,
iump
across
the TEN lermi'
nal and
the GND
terminal
gl
the
diagnosis con'
nector.
lgnition Timing
Inspeclion / Adiustment
1.
Check
that the
idle speed
is within
the specification.
ldle speed:
MTX
(Neutral) ?50
:l! rPm
ATX
(P
range) 1,100
i'!
rpm
2. Check
the ignjtion
timing
with a timing
light
lgnition
timing:
BTDC 16
+
|
"
3.
lf the ignition
timing
is not within the
specification,
loosen
the
distributor
lock bolts
and turn the
distributor
to make
the adiustment-
4. Tiqhten
the distributor
lock bolts to
the specilied torque.
Tiohteninq
toloue:
ie-zsI{m
(i.6-2.3
m-kg, 12-16
ftlb)
5.
Put a seal on
the distributor
lock bolt
ACHOMETEF
.--
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A-12