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Home >> Cadillac >> 2020 >> XT6 Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 370 (Power Seats) >> Diagnostic Information and Procedures >> Memory Seat Feature Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2023 GMC Hummer EV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Vehicle OFF, disconnect the connector at the S47D Front Seat Adjuster Memory Switch - Driver.
  2. Test for less than 10 Ω between the low reference circuit terminal 5 and ground.
    • If 10 Ω or greater 
    1. Test circuit 1150 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found
    2. Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 Ω 
  3. Vehicle in Service Mode.
  4. Press a power seat switch, to wake up the K40D Driver Seat Adjuster Memory Module.
  5. Test for 9 V or greater between signal circuit terminal 6 and ground.
    • If less than 9 V 
    1. Test circuit 614 for a short to ground.
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found
    2. Test circuit 614 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found
    3. Replace the K40D Driver Seat Adjuster Memory Module.
    • Go to next step: If 9 V or greater 
  6. Test for 4.8 - 5.2 Volts between signal circuit terminal 7 and ground.
    • If less than 4.8 V 
    1. Test circuit 615 for a short to ground.
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found
    2. Test circuit 615 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found
    3. Replace the K40D Driver Seat Adjuster Memory Module.
    • If greater than 5.2 V 
    1. Test circuit 615 for a short to voltage.
      • If a short to voltage is found, repair the fault on the circuit.
      • Go to next step: If a short to voltage is not found
    2. Replace the K40D Driver Seat Adjuster Memory Module.
    • Go to next step: If between 4.8 - 5.2 V 
  7. Vehicle OFF, disconnect the connector X3 at the K40D Driver Seat Adjuster Memory Module.
  8. Vehicle in Service Mode.
  9. Test for less than 1 V between signal circuit terminal 6 and ground.
    • If 1 V or greater 

      Repair the short to voltage on the circuit 614.

    • Go to next step: If less than 1 V 
  10. Test or replace the S47D Front Seat Adjuster Memory Switch - Driver.
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