Volvo 819 E - Page 87

Group 28 Ignition systems
Fault tracing , EZ-102K
Fault tracing, EZ-102K
HI
Check security of ground leads at terminals on intake
manifold (twin black leads).
<:S=0
V
12 V
15
1 39788
H2
Check LT supply to ignition coil and power stage
Switch on ignition. Measure voltage between ignition
coil terminal 15 and ground. Voltmeter reading shou ld
be
approx. 12 V.
If vottage = 0 V:
Open-circuit in lead from central electrical unit. (See
wiring diagram.)
H3
Disconnect power stage conneetor
Pull back con nector sleeve and connect inst rument to
rear of connec tor. Measurement from front may dam-
age terminal s, resulting in loo seness and poor contact.
Check
that voltage across each of connector terminals
1 and 4 and ground is approx. 12 V. Measure individu-
ally between each terminal and ground.
1
4
I
0=::>
I
JL
I
143 266
I
If vottage = 0 V:
Open-circuit in lead from central electrical unit. (See
wiring diagram,)
Switch off ignition.
137