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Ignition System Diagnosis

NOTE: If DTCs P0351, P0352, P1351 or P1352 are set, diagnose these DTCs first. See appropriate SELF-DIAGNOSTICS article.
  1. Check for spark at all spark plug wires. If spark is not present on only one wire, replace faulty wire. If spark is not present on 2 wires sharing the same ignition coil, replace faulty ignition coil. If spark is not present at any wire, go to next step.
  2. Check EIS fuse (10-amp) located in underhood fuse block. Replace if necessary. Turn ignition on. Disconnect EI module harness connector. Using test light connected to ground, probe ignition feed circuit at EI module harness connector. If test light illuminates, go to next step. If test light does not illuminate, repair open in ignition feed circuit.
  3. Using test light connected to battery positive terminal, probe ground circuit at EI module harness connector. If test light illuminates, EI module or connections are faulty. If test light does not illuminate, repair open in ground circuit.
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