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Home >> Cadillac >> 2017 >> CTS Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection System And Pedestrian Protection System >> Diagnostic Information and Procedures >> DTC B172E or B172F: Driver Seat Cushion Rear Haptic Alert Motor Control Circuit >> Circuit/System Testing
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Circuit/System Testing

  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:
    • 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.
  4. 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
  5. 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 
    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 the P45 Seat Haptic Movement Motor - Driver turn on and off 
  6. Ignition OFF, connect the harness connector at the K40D Seat Memory Control Module - Driver, ignition ON.
  7. 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 
  8. 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 
  9. All OK.
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