Volvo 819 E - Page 88

Group 28 Ign it ion systems
Fault tr aci ng , EZ - 102K
1
4
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H4
Check ignition coil primary winding and leads
Measure resistance betwe en te rmina ls 1 and 4 in
power un it co nne ctor. (This is equiva l ent of measuring
re sistance acr os s i gn it io n coil term inals 1 and 15, in-
c
lud ing leads.l
(See w iring
diagram .)
Reading should be 0.6--0.9 ohm .
Other reeding: Ignition c oil faulty or short -c ircuit in
leads.
Measure resistance
directly between Ignition coil ter-
minals 1 and 15.
If resistance is correct (0 .6--0.9 ohm) : Fau lt in lead be-
tween ignition coil and connector .
If resistance is incorrect : Replace ignition coil.
138
1
1
~~--15
.. ,~
H5
Check ignition coil secondary winding
Measure resistance between HT terminal and terminal
1 on ign i tion c oi l.
Resistance
should be 6. 5-8 .5 kohm .
Oth er reading: Ignit io n coil faulty . Replace coil.