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Home >> Buick >> 2017 >> Envision Preferred, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection System And Pedestrian Protection System >> Diagnostic Information and Procedures >> Seat Haptic Signal Motor Malfunction >> Circuit/System Testing
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Circuit/System Testing

  1. Vehicle OFF, disconnect the X5 harness connector at the K40D Seat Memory Control Module - Driver, vehicle in Service Mode.
  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. Vehicle OFF and all vehicle systems OFF. It may take up to 2 minutes 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. Vehicle OFF, connect the harness connector at the K40D Seat Memory Control Module - Driver, vehicle in Service Mode.
  8. Verify the P45LR 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 K40D Seat Memory Control Module - Driver.

    • If the motor functions 
  9. Verify the P45RR 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 K40D Seat Memory Control Module - Driver.

    • If the motor functions 
  10. All OK.
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