Diagnostic Aids

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This engine application may use 2 fuses, one for each bank, to supply ignition voltage to the ignition module/coil assemblies and also to the fuel injectors. A good indication that a fuse is open is that all misfire counters are incrementing on one side of the engine.
An open/high resistance on the low reference circuit to the ignition coil may cause a misfire.
An erratic or weak spark is considered a no spark condition.