Mazda 121 - Ignition Timing Adjustment

IGNITION
SYSTEM
---.--.-
_e\,t-
tc_
IGNITION
TIMING
Adiustment
1.
Warm up
the erg'ne
to
normal operaling
lenoeralure
and
run
i at
rdle
(P
ranqe
[ATX]
or
neLtrdl
[L4TX])
2. Turn all
electrical
loads
OFF.
3.
Turn the
tuC switch
OFF.
4. Connect
a
test lachometer
to the
diagnosis
connector
lG-
terminal.
5. Connect
the SST
to the diagnosis
conneclor.
6-
Set switch
A on the
System
Selector
to
position
1
and
TEST
SWITCH
to SELF
TEST.
Note
.
To create
the test
condition
without using
the
Sys'
tem
Selector,
connect
terminals
TEN and
GNO
of
the diagnosis
connector
wiih a
iumper
wiae.
7. Check the
idle speed
and set
it to the
specitied
speed
it
necessary.
ldle speed:
600-650
810-860
15."u-t'\
-,€=4
,N.
rpm
rPm
(MTX)
(Arx)
8.
Check the
igniiion
timing.
Specification:
BTDC
16
+
1'
9.
ll
the
ignrtron
tim ng
is nol as
specilied
loose'l Ihe dislribL
tor |oc: bofts and
turn
I le dlsllibt
tol
Io makelhe
adiugment
1O- Tighlen ihe
dlstributor
lock bolts
to
specilied torque.
Tiohteninq
torque:
ie-za
-H.m
{i.s-z.s
m-tg,
12-16ltlb)
G-l8