Ignition Coil Power Source
1. Disconnect ignition coil primary leads. Turn ignition on. Using voltmeter, check voltage between ground and Black/Yellow wire terminal of ignition coil harness.
2. Battery voltage should be present. If battery voltage is not present, check for open in Black/Yellow wire between coil and ignition switch.
Ignitor Power Source
Turn ignition off. Disconnect harness connector at distributor. Turn ignition on. Using voltmeter,
check for battery voltage between ground and Black/Yellow wire of harness. If voltage is not present,
check for open in Black/Yellow wire between ignition coil and harness connector. If wire is okay, check ignition coil resistance (for internal short to ground).
Ignition Coil Resistance
1. Remove primary and secondary leads from ignition coil. Using an ohmmeter, check resistance between primary terminals "A" and "C" of ignition coil. See Fig. 2 .
Resistance should be .6-.8 ohm at room temperature.
2. On Accord, check resistance between terminals "B" and "D" of ignition coil (tachometer circuit). Resistance should be about 2090-2310 ohms at room temperature.
3. On all models, check secondary resistance between terminal "A" and secondary output
terminal (coil tower). Secondary resistance 14,000-22,000 ohms. Check for continuity between terminals "A" and "B". Continuity should exist. If readings are not within specification, replace coil.
Thursday, January 8th, 2009 AT 1:43 AM