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Circuit/System Verification

  1. Ignition OFF, test for less than 5 ohm between terminal 4 at the data link connector (DLC) and ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  2. Ignition OFF, test for less than 5 ohm between the DLC terminal 5 and ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Ignition ON, test for B+ between the DLC terminals 16 and ground.
    • If not the specified value, test the B+ circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, refer to the scan tool user guide.
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