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Home >> GMC >> 2021 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (Driver Assistance Systems) >> Diagnostic Information And Procedures >> Seat Haptic Signal Motor Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2020 GMC Terrain and 2020 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector:X5 @ K40D Seat Memory Control Module - Driver
  3. Ignition - On / Vehicle - In Service Mode
  4. Test for less than 1 V between the test points:
    • Control circuit terminal 4 & Ground
    • Control circuit terminal 5 & Ground
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
    5. NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  5. Ignition/Vehicle & All vehicle systems - Off
  6. Test for 27 to 51 ohms between the test points:
    • Control circuit terminal 4 & Ground
    • Control circuit terminal 5 & Ground
    • If less than 27 ohms 

      Replace the appropriate component:P45LR Seat Haptic Movement Motor - Driver Left Rear or P45RR Seat Haptic Movement Motor - Driver Right Rear

    • If greater than 51 ohms 
    1. Test or inspect for the following:Ground Connection - Clean & Secure
      • If not correct

        Repair as necessary

      • Go to next step: If correct
    2. Replace the appropriate component:P45LR Seat Haptic Movement Motor - Driver Left Rear or P45RR Seat Haptic Movement Motor - Driver Right Rear
    • Go to next step: If between 21 and 57 ohms 
  7. Momentarily connect a 3 A fused jumper wire between the test points:
    • Control circuit terminal 4 & B+
    • Control circuit terminal 5 & B+
  8. Verify the component turns On and Off when connecting and disconnecting the jumper wire:P45LR Seat Haptic Movement Motor - Driver Left Rear or P45RR Seat Haptic Movement Motor - Driver Right Rear
    • If the component does not turn On and Off 

      Replace the appropriate component:P45LR Seat Haptic Movement Motor - Driver Left Rear or P45RR Seat Haptic Movement Motor - Driver Right Rear

    • Go to next step: If the component turns On and Off 
  9. Ignition/Vehicle & All vehicle systems - Off
  10. Connect the electrical connector at all components.
  11. Ignition - On / Vehicle - In Service Mode
  12. Perform the scan tool function:Driver Seat Cushion Left Rear Haptic Movement & Driver Seat Cushion Right Rear Haptic Movement - On and Off

    Verify the component produces a vibration that can be heard and felt.

    • If the component does not activate 

      Replace the appropriate component:K40D Seat Memory Control Module - Driver

    • Go to next step: If the component activates 
  13. All OK.
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