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Home >> Infiniti >> 1998 >> Q45 t >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Ignition Checks >> DISTRIBUTORLESS Ignition System Checks >> Ignition Coil Power Source

Ignition Coil Power Source

  1. Turn ignition off. Disconnect ignition coil harness connector. Turn ignition on. Connect DVOM negative lead to ground and proceed as follows:
    • On I30, individually connect positive lead to each Red wire.
    • On Q45, individually connect positive lead to each Black/White wire.

    On all models, battery voltage should be present on each circuit.

  2. If battery voltage is not present, turn ignition off and proceed as follows:
    • On I30, check harness continuity between ignition coil and fuse block. If continuity is present, check continuity of Black/Red wire between fuse block and ignition switch.
    • On Q45, check 30-amp fuse in fuse box. If fuse is okay, check harness continuity between ignition coil and ignition switch, and harness continuity of White/Black wire between ignition switch and battery.
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