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Circuit/System Verification

  1. Ignition ON
  2. Using the Graphical Data Display in the scan tool, verify the ECM Ignition 1 Signal is 8.9 V or greater during ignition CRANK
    • If Ignition 1 Signal is below 8.9 V 
    1. Verify that there is no excessive parasitic current drain, refer to Battery Electrical Drain/Parasitic Load Test .
      • If there is excessive parasitic current drain, determine cause of the excessive parasitic current drain.
      • If there is no excessive parasitic current drain, refer to Circuit/System Testing.
    • If Ignition 1 Signal is 8.9 V or greater 
  3. All OK.
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