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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1780 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> Power Liftgate Malfunction (Liftgate Position Sensor Malfunction) >> Circuit/System Testing
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Circuit/System Testing

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  1. Ignition OFF, disconnect the X3 harness connector at the liftgate control module.
  2. Ignition OFF, test for less than 1 Ω between the low reference terminal 11 at the liftgate control module and ground.
    • If greater than the specified range, replace the liftgate control module.
  3. Ignition ON, test for 4.8-5.2 V between 5 V reference terminal 8 at the liftgate control module and ground.
    • If not within the specified range, replace the liftgate control module
  4. Ignition ON, test for 4.8-5.2 V are between sensor 1 signal terminal 9 and low reference terminal 11 at the liftgate control module.
    • If not within the specified range, replace the liftgate control module.
  5. Test for 4.8-5.2 V between sensor 2 signal terminal 10 and low reference terminal 11 at the liftgate control module.
    • If not within the specified range, replace the liftgate control module.
  6. If all circuits test normal, test or replace the liftgate actuator assembly.
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