Ignition Test Procedures; Direct Voltage Adapter (Dva) Test For Stator - Mercury 30 Service Manual

Ignition Test Procedures

Direct Voltage Adapter (DVA) Test
for Stator
WARNING
DANGER - HIGH VOLTAGE/SHOCK HAZARD! Do
not touch ignition components and/or metal test
probes while engine is running and/or being
"cranked". STAY CLEAR OF SPARK PLUG
LEADS. To assure personal safety, each individu-
al spark plug lead should be grounded to engine.
WARNING
When testing or servicing the ignition system,
high voltage is present. DO NOT TOUCH OR DIS-
CONNECT any ignition parts while engine is run-
ning, while key switch is on or while battery
cables are connected.
CAUTION
Failure to comply with the following items may
result in damage to the ignition system.
1. DO NOT reverse battery cable connections. The
battery negative cable is (-) ground.
2. DO NOT "spark" battery terminals with battery
cable connections to check polarity.
3. DO NOT disconnect battery cables while engine
is running.
4. DO NOT crank engine when CDMs or TPM are
not grounded to engine.
CAUTION
To protect against meter and/or component dam-
age, observe the following precautions:
– 400 VDC* test position (or higher) MUST BE
used for all tests.
– INSURE the Positive (+) lead/terminal of DVA is
connected to the Positive (+) receptacle of me-
ter
Selector Switch
TEST
Position
Stator 400 DVA
Stator 40 DVA
* If voltage is low, disconnect one Capacitor Discharge Module (CDM) connector at a time while
monitoring voltage reading.
If voltage rises, replace that CDM. If voltage does not rise, replace stator.
90-826148R2 MARCH 1997
– DO NOT CHANGE meter selector switch posi-
tion while engine is running and/or being
"cranked".
– ALL COMPONENTS MUST BE GROUNDED
during tests. Running or "cranking" engine
with TPM or CDM ungrounded may damage
components.
*If using a meter with a built-in DVA, the DVA/400 VDC (or
higher) test position should be used.
NOTE: Test leads are not supplied with the DVA. Use
test leads supplied with meter.
Test procedures and specifications are provided for
checking primary ignition voltage while the en-
gine is running and/or being "cranked" with all har-
nesses connected.
Install test harness between ignition harness and
CDM as shown.
a - Stator/Trigger Harness
b - Test Harness (P/N 91-825207A1)
c - Capacitor Discharge Module (P/N 822779)
a
a - Stator/Trigger Harness
b - Test Harness (P/N 91-825207A2)
c - Capacitor Discharge Module (P/N 827509)
RED Lead
Red Test Harness
(Green/White)
Green or White/Green
b
c
c
b
Voltage Reading*
BLACK Lead
@ (300 - 4000) RPM
Ground
Ground
ELECTRICAL - 2A-21
a
190 - 320
20 - 40