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Home >> Buick >> 2013 >> Encore Premium, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 96 (Object Detection System And Pedestrian Protection System) >> Diagnostic Information and Procedures >> Parking Assist System Malfunction >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2016 Chevrolet Trax and 2016 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

Parking Assist Switch Circuit Malfunction

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 Ω between the ground circuit terminal 14 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the ground circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  3. Verify the scan tool Parking Assist Switch parameter is Inactive.
    • If the parameter is not Inactive 
    1. Ignition OFF, disconnect the X1 harness connector at the K41 Front and Rear Parking Assist Control Module.
    2. Test for infinite resistance between the signal circuit terminal 9 and ground.
      • If less than infinite resistance, repair the short to ground on the signal circuit.
      • lf infinite resistance, replace the K41 Front and Rear Parking Assist Control Module.
    • If the parameter is Inactive 
  4. Connect a 3 A fused jumper wire between the signal circuit terminal 9 and ground.
  5. Verify the scan tool Parking Assist Switch parameter is Active.
    • If the parameter is not Active 
    1. Ignition OFF, disconnect the X1 harness connector at the K41 Front and Rear Parking Assist Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit
      • If less than 1 V, replace the K41 Front and Rear Parking Assist Control Module.
    3. Ignition OFF.
    4. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K41 Front and Rear Parking Assist Control Module.
    • If the parameter is Active 
  6. Test or replace the S48A Multifunction Switch - Instrument Panel.

Parking Assist Switch Indicator Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel, ignition ON.
  2. Verify a test lamp illuminates between the control circuit terminal 2 and ground.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.
    2. Test for less than 2 Ω in the control circuit end to end.
    • If the test lamp illuminates 
  3. Ignition OFF, connect the harness connector at the S48A Multifunction Switch - Instrument Panel. Disconnect the X1 harness connector at the K41 Front and Rear Parking Assist Control Module.
  4. Verify the parking assist switch indicator is not illuminated.
    • If the parking assist switch indicator is illuminated 
    1. Ignition OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel.
    2. Test for infinite resistance between the S48A Multifunction Switch - Instrument Panel control circuit terminal 6 and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • If infinite resistance, replace the S48A Multifunction Switch - Instrument Panel.
    • If the parking assist switch indicator is not illuminated 
  5. Connect a 3 A fused jumper wire between the control circuit terminal 6 and ground.
  6. Verify the parking assist switch indicator is illuminated.
    • If the parking assist switch indicator is not illuminated 
    1. Ignition OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Ignition OFF.
    4. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the S48A Multifunction Switch - Instrument Panel.
    • If the parking assist switch indicator is illuminated 
  7. Replace the K41 Front and Rear Parking Assist Control Module.
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