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Circuit/System Testing

WARNING: This page is about a different car, the 2016 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X5 harness connector at the K40 Seat Memory Control Module, ignition ON.
  2. Test for less than 1 V between the appropriate control circuit terminal listed below and ground:
    • Terminal 4 - P45RR Seat Haptic Movement Motor - Driver Right Rear
    • Terminal 5 - P45LR Seat Haptic Movement Motor - Driver Left Rear
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  3. Ignition OFF and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down.
  4. Test for 27-51 Ω between the appropriate control circuit terminal listed below and ground:
    • Terminal 4 - P45RR Seat Haptic Movement Motor - Driver Right Rear
    • Terminal 5 - P45LR Seat Haptic Movement Motor - Driver Left Rear
    • If less than 27 Ω 

      Test or replace the appropriate P45 Seat Haptic Movement Motor - Driver.

    • If greater than 51 Ω 
    1. Verify the circuit ground connection is clean and secure.
      • If the ground connector is not clean or secure, repair as necessary.
      • If the circuit ground connection is clean and secure
    2. Replace the appropriate P45 Seat Haptic Movement Motor - Driver.
    • If between 27-51 Ω 
  5. Install a 3 A fused jumper wire between the appropriate control circuit terminal listed below and B+.
    • Terminal 4 - P45RR Seat Haptic Movement Motor - Driver Right Rear
    • Terminal 5 - P45LR Seat Haptic Movement Motor - Driver Left Rear
  6. Verify the appropriate P45 Seat Haptic Movement Motor - Driver turns on and off.
    • If the P45 Seat Haptic Movement Motor - Driver does not turn on and off 

      Replace the appropriate P45 Seat Haptic Movement Motor - Driver.

    • If the P45 Seat Haptic Movement Motor - Driver turn on and off 
  7. Ignition OFF, connect the harness connector at the K40 Seat Memory Control Module, ignition ON.
  8. Verify the P45LR Seat Haptic Movement Motor - Driver Left Rear turns on and off when commanding the Driver Seat Cushion Left Rear Haptic Movement On and Off with a scan tool.
    • If the motor does not function 

      Replace the K40 Seat Memory Control Module.

    • If the motor functions 
  9. Verify the P45RR Seat Haptic Movement Motor - Driver Right Rear turns on and off when commanding the Driver Seat Cushion Right Rear Haptic Movement On and Off with a scan tool.
    • If the motor does not function 

      Replace the K40 Seat Memory Control Module.

    • If the motor functions 
  10. All OK.
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