Mercury 305 CID - Page 620

ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5E-7990-823225--1 1096
Ignition System Check (2 of 2)
5
REPLACE IGNITION COIL AND
RECHECK
FOR SPARK WITH TIMING
LIGHT. IF STILL
NO SPARK, REINSTALL ORIGI-
NAL COIL
AND REPLACE DISTRIBUTOR
MODULE.
• DISCONNECT DISTRIBUTOR 4 TERMINAL CONNECTOR.
• REMOVE DISTRIBUTOR CAP.
• DISCONNECT PICK-UP COIL CONNECTOR FROM MODULE.
• CONNECT VOLTMETER FROM TACH. TERMINAL TO GROUND.
• IGNITION “ON.”
• INSULATE A TEST LIGHT PROBE TO 1/4, FROM TIP AND NOTE
VOLTAGE, AS TEST LIGHT IS MOMENTARILY CONNECTED FROM A
VOLTAGE SOURCE (1.5 TO 8 V) TO MODULE TERMINAL “P” (CHART
1 OF 2 PAGE 78).
LIGHT ON
STEADY
LIGHT
BLINKS
NO DROP IN VOLTAGE
CHECK MODULE GROUND.
IF OK, REPLACE MODULE.
• CHECK FOR SPARK FROM COIL WIRE
WITH TIMING LIGHT AS TEST LIGHT IS
REMOVED FROM MODULE TERMINAL
VOLTAGE DROPS
6
SPARK
• REPLACE IGNITION COIL
AND REPEAT STEP 5.
NO SPARK
• IS ROTATING POLE
PIECE STILL MAGNE-
TIZED?
SYSTEM OKIGNITION COIL REMOVED IS OK,
REINSTALL COIL AND CHECK COIL
WIRE FROM DIST. CAP. IF OK, RE-
PLACE DISTRIBUTOR MODULE.
REPLACE POLE
PIECE AND
SHAFT ASSEMBLY.
NO
YES
CHECK PICK-UP COIL OR
CONNECTIONS (COIL
RESISTANCE SHOULD BE
500-1500 OHMS AND
NOT GROUNDED.)
Fig. 1
TEST LIGHT
TO DC
POWER
SUPPLY
(1.5 to 8 V)
b
a
NO SPARK
SPARK
CHART CONTINUED
FROM PAGE 75