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Home >> GMC >> 2016 >> Yukon Denali, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (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

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 GMC Yukon XL, 2015 GMC Yukon, 2015 Chevrolet Tahoe, 2015 Chevrolet Suburban, and 2015 Cadillac Escalade ESV. 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 K40D Seat Memory Control Module - Driver, ignition ON.
  2. Test for less than 1 V between the appropriate control circuit terminal listed below and ground:
    • P45LR Seat Haptic Movement Motor - Driver Left Rear terminal 5
    • P45RR Seat Haptic Movement Motor - Driver Right Rear terminal 4
    • 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:
    • P45LR Seat Haptic Movement Motor - Driver Left Rear terminal 5
    • P45RR Seat Haptic Movement Motor - Driver Right Rear terminal 4
    • 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+.
    • P45LR Seat Haptic Movement Motor - Driver Left Rear terminal 5
    • P45RR Seat Haptic Movement Motor - Driver Right Rear terminal 4
  6. Verify the appropriate P45 Seat Haptic Movement Motor - Driver is active.
    • If the P45 Seat Haptic Movement Motor - Driver is not active 

      Replace the appropriate P45 Seat Haptic Movement Motor - Driver.

    • If the P45 Seat Haptic Movement Motor - Driver is active 
  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 turn ON and OFF 

      Replace the K40 Seat Memory Control Module.

    • If the motor turns ON and OFF 
  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 turn ON and OFF 

      Replace the K40 Seat Memory Control Module.

    • If the motor turns ON and OFF 
  10. All OK.
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