Service manual

TROUBLESHOOTING SERVICE MANUAL NUMBER 26
Page 1C-12 90-861329--1 MARCH 1999
Ignition System Check(1 of 2)
SPARK
CHECK FUEL, SPARK PLUGS, ETC.
SEE “TROUBLESHOOTING.”
1
• DISCONNECT 4 TERMINAL CONNECTOR
ON DISTRIBUTOR AND CHECK FOR
SPARK.
• IF A TACHOMETER IS CONNECTED TO THE TACH TERMINAL, DISCONNECT IT
BEFORE PROCEEDING WITH THE TEST.
• CHECK SPARK AT PLUG WIRE USING AN INDUCTIVE PICKUP TIMING LIGHT
WHILE CRANKING. A FLASHING LIGHT INDICATES SPARK. (IF NO SPARK ON FIRST
WIRE, CHECK SECOND WIRE.) A FEW SPARKS AND THEN NOTHING
IS CONSIDERED NO SPARK.
NO SPARK
• CHECK FOR SPARK AT COIL WIRE WITH TIMING
LIGHT WHILE CRANKING. (LEAVE TIMING LIGHT
CONNECTED TO COIL WIRE FOR STEPS 3-6).
NO SPARK
• DISCONNECT DISTRIBUTOR 2 TERMINAL “C/+”
CONNECTOR.
• IGNITION SWITCH “ON,” ENGINE STOPPED.
• CHECK VOLTS AT “+” AND “C” TERMINALS OF
DISTRIBUTOR HARNESS CONNECTION.
1A
2
3
• RECONNECT DISTRIBUTOR 2
TERMINAL CONNECTOR.
• WITH IGNITION “ON,” CHECK VOLTAGE
FROM TACH. TERMINAL TO GROUND
BOTH TERMINALS 10
VOLTS OR MORE
CHECK FOR OPEN OR
GROUND IN CKT. FROM
“C” TERMINAL TO IGNI-
TION COIL. IF CKT IS OK,
FAULT IS IGNITION COIL
OR CONNECTION.
UNDER 10 VOLTS
“C”TERMINAL ONLY
4
REPAIR OPEN
TACH. LEAD OR
CONNECTION AND
REPEAT TEST #4.
• CONNECT TEST LIGHT FROM TACH.
TERMINAL TO GROUND.
• CRANK ENGINE AND OBSERVE
LIGHT.
OVER 10 VOLTS
REPLACE MODULE AND
CHECK FOR SPARK
FROM COIL AS IN STEP 6.
UNDER 1 VOLT
1 TO 10 VOLTS
REPLACE
IGNITION
COIL.
NO
SPARK
SPARK
SYSTEM
OK
NO SPARK
SPARK
REPAIR WIRE FROM MOD-
ULE “+” TERMINAL TO “B”
TERMINAL OF BLACK
IGNITION COIL CONNEC-
TOR OR PRIMARY CKT. TO
IGNITION SWITCH.
BOTH TERMINALS
UNDER 10 VOLTS
CHART CONTINUED
ON NEXT PAGE
a
b
INSPECT CAP FOR WATER,
CRACKS, ETC. IF OK,
REPLACE ROTOR.
SPARK
REPLACE MAGNETIC
SHAFT ASSEMBLY.
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