ON–VEHICLE INSPECTION
SPARK TEST
(a) Disconnect high–tension cord from the distributor.
(b) Hold the cord end approx. 12.5 mm (0.50 in.) from engine ground of vehicle.
(c) Check if spark occurs while engine is being cranked.
HINT: To prevent gasoline from being injected from injectors during this test, crank the engine for
no more than 1 – 2 seconds at a time.
If the spark does not occur, perform the test as follows.
CHECK RESISTANCE OF IGNITION COIL
(See page IG–7)
Resistance: (Cold) (Hot)
Primary 0.36–0.55 0.45 – 0.85
Secondary 9.0 – 15.4 k 11.4 – 18.1 k
CHECK POWER SUPPLY TO IGNITION
COIL AND IGNITER
1. Turn ignition switch ON.
2. Check that there is battery voltage at ignition
coil positive (+) terminal.
CHECK RESISTANCE OF SIGNAL
GENERATOR (PICKUP COIL)
(See page IG–8)
Resistance (Cold): 185 – 275
(Hot): 240 – 325
CHECK AIR GAP OF DISTRIBUTOR
(See page IG–7)
Air gap: 0.2 – 0.4 mm 10.008 – 0.016 in.)
CHECK RESISTANCE OF HIGH–TENSION CORD
(See page IG–6)
Maximum resistance: 25 k per cord
CHECK CONNECTION OF IGNITION COIL,
IGNITER AND DISTRIBUTOR CONNECTOR
Check wiring between ECM, distributor
and igniter, and then try another ECM.
Check wiring between ignition switch
to ignition coil and igniter.
CHECK IGt SIGNAL FROM ECM
(See page EG–134, 152 or 170)
Replace the distributor housing
assembly.
Replace the distributor housing
assembly.
Replace the ignition coil.
TRY ANOTHER IGNITER
Replace the cord(s).
Connect securely.
SPARK TEST
BAD
BAD
BAD
BAD
BAD
BAD
BAD
BAD
–IGNITION SYSTEM (22R– E)
IG–5
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