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Home >> Buick >> 2016 >> Envision >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Power Door Lock System And Release Systems >> Diagnostic Information and Procedures >> Liftgate Handsfree Sensor Malfunction >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the X2 harness connector at the K171 Hands-Free Liftgate Sensor Control Module.
  2. Test for 0.3-0.8 Ω between the B275A Hands-Free Liftgate Sensor-Upper signal circuit terminal 1 and the signal circuit terminal 2.
    • If less than 0.3 Ω or greater than 0.8 Ω 
    • Replace the B275A Hands-Free Liftgate Sensor-Upper
    • If between 0.3-0.8 Ω 
  3. Ignition OFF, disconnect the X3 harness connector at the K171 Hands-Free Liftgate Sensor Control Module.
  4. Test for 0.3-0.8 Ω between the B275B Hands-Free Liftgate Sensor-Lower signal circuit terminal 1 and the signal circuit terminal 2.
    • If less than 0.3 Ω or greater than 0.8 Ω 
    • Replace the B275B Hands-Free Liftgate Sensor-Lower
    • If between 0.3-0.8 Ω 
  5. Replace the K171 Hands-Free Liftgate Sensor Control Module.
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