Volvo 819 E Service Manual page 88

28
Group Ignition systems
Fault tracing, EZ- 102K
1
I
I
I
I
138
1
..
1
ignition coil primary winding and leads
Measure resistance between termina ls 1 and
power unit connector. (This
re sistance across ign it ion
clud ing leads.l
(See w iri ng diagram .)
Readi ng should be 0.6--0.9
Other Ignition coil faulty or short-circu
leads.
Measure resistance
minals 1 and 15.
If resistance is correct
tween ignition coil and
If resistance is incorrect
Check ignition coil secondary winding
Measure resistance between
1 on ign ition coi l.
Resistance should be 6.5-8.5 kohm
Other reading : Ign ition coil
is equiva lent of measuring
coil termina ls 1 and
ohm.
between
(0.6--0.9 ohm) : Fau lt in lead be-
connector.
: Replace ignition coi
HT terminal and
.
faulty. Replace coil.
H4
4 in
15, in-
it in
coil ter-
l.
H5
terminal