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Circuit/System Testing

WARNING: This page is about a different car, the 2018 Buick Envision. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:

When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:

  • Passenger seat position sensor
  • SDM
  • Passenger seat position sensor wiring harness connector
  • SDM wiring harness connector
  1. Ignition OFF, disconnect the harness connector at the passenger seat position sensor.
  2. Test for less than 10 ohms between low reference circuit terminal 1 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the SDM.
  3. Ignition ON, test for 4.5 - 5.5 volts between the signal circuit terminal 2 and ground.
    • If less that the specified range, test the signal circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the SDM.
    • If greater that the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the SDM.
  4. If the circuits test normal, test or replace the passenger seat position sensor.
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