15-40 ELECTRICAL SYSTEM
Disconnect the primary leads from the coil terminals.
Measure the primary winding resistance [A] as follows:
Connect the hand tester between the coil terminals.
Set the tester to the × 1 Ω range, and read the tester.
Measure the secondary winding resistance [B] as follows:
Pull the spark plug cap off the lead.
Connect the hand tester between the spark plug lead and
black or green lead terminal.
Set the tester to the × 1 kΩ range, and read the tester.
Ignition Coil Winding Resistance
If the tester does not read as specified, replace the coil.
If the tester reads as specified, the ignition coil windings
are probably good. However, if the ignition system still
does not perform as it should after all other components
have been checked, test replace the coil with one known
to be good.
Check the spark plug leads for visible damage.
If any spark plug lead is damaged, replace the coil.
Ignition Timing Inspection
Remove the ignition timing inspection plug.
Attach the timing light [A] in the manner prescribed by the
Special Tools - Timing Light: 57001-1241
Filler Cap Driver: 57001-1454
Start the engine and aim the timing light at the ignition
timing mark on the alternator rotor.
Run the engine at the speeds specified and note the align-
ment of the ignition timing marks.
Engine speed r/min (rpm)
1500 and below
Do not mix up the ignition timing marks with the top mark
Torque - Timing Inspection Plug: 2.5 N·m (0.25 kgf·m, 22
If the ignition timing is incorrect, inspect the IC igniter and
the pickup coil.
2.6 ∼ 3.2 Ω
13.5 ∼ 16.5 kΩ
Notch [A] aligns with:
F mark [B] on alternator rotor