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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 223 (Engine Controls - Basic Diagnostic Procedures - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline Engines) >> Ignition Systems >> Electronic Ignition System Diagnosis >> Test Description

Test Description

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The number below refers to step number on diagnostic procedure.

  1. 4 -  Monitoring misfire current counters determines if a fault is present.
  2. 11 -  A good indication that fuse is open is all off misfire current counters are incrementing on one side of engine. Inspect ignition positive voltage circuit for a grounded circuit. If fuse is open and ignition coil circuits are OK, inspect injector circuits for being grounded.

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