Leading Side

IGNITER

Leading Side Igniter Testing:

NOTE: Before inspection, ensure that battery is at or near full charge.

1. Disconnect two prong connector and connect a voltmeter in series with the "BY" wire terminals.
2. Turn ignition switch "ON." Check that meter reads approximately 12V.
3. Turn ignition switch "OFF" and disconnect voltmeter and negative battery cable.
4. Connect igniter checker (Mazda SST #49 F018 002 or aftermarket equivalent) between the two prong connectors.

CAUTION: To avoid component damage, disconnect the negative battery cable before removing "B" wire from coil/igniter assembly. Do not disconnect "Br" wire from coil. To avoid shock hazard, high tension leads must remain connected to coil while performing this test.

5. Disconnect "B" wire from coil/igniter assembly.
6. Reconnect negative battery cable.
7. Connect ohmmeter negative lead to "B" wire and positive lead to ground.
8. Turn ignition switch "ON."
9. Push up igniter checker switch "SW2" while observing ohmmeter. The needle should jump up to approximately one third on the X1 scale and then return.
10. If not as specified, replace igniter.

COIL

Leading Side Coil Testing:

1. Disconnect negative battery cable.
2. Check coil resistance as shown on image. It should read below 1 ohm.
3. If not as specified, replace coil.