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Home >> Saturn >> 2001 >> LW300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Basic Diagnostic Procedures >> No-Start Diagnosis >> No Start - Engine Cranks Okay (2.2L - SATURN) >> PCM Input Circuits
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PCM Input Circuits

  1. Check CONTROLS IGN 1 fuse (10-amp) located in underhood fuse block. If fuse is okay, go to next step. If fuse is open, check PCM IGN 1 power feed circuit and associated circuits for short to ground. Repair as necessary.
  2. Disconnect Blue PCM harness connector. Measure voltage between ground and IGN 1 circuit at PCM harness connector. If battery voltage is present, harness connections or PCM are faulty. If battery voltage is not present, repair open in IGN 1 circuit.
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