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Home >> Cadillac >> 2017 >> Escalade ESV Base, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection System And Pedestrian Protection System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> Parking Assist System Malfunction (Cadillac, with UGN) >> Circuit/System Testing
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Circuit/System Testing

Parking Assist Switch Circuit Malfunction

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - 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 5 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 Status parameter is Inactive.
    • If the parameter is not Inactive 
    1. Ignition OFF, disconnect the X1 harness connector at the K124 Active Safety Control Module.
    2. Test for infinite resistance between the signal circuit terminal 6 and ground.
      • If less than infinite resistance, repair the short to ground on the signal circuit.
      • If infinite resistance, replace the K124 Active Safety Control Module.
    • If the parameter is Inactive 
  4. Connect a 3 A fused jumper wire between the signal circuit terminal 6 and ground.
  5. Verify the scan tool Parking Assist Switch Status parameter is Active.
    • If the parameter is not Active 
    1. Ignition OFF, disconnect the X1 harness connector at the K124 Active Safety 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 K124 Active Safety 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 K124 Active Safety Control Module.
    • If the parameter is Active 
  6. Test or replace the S48D Multifunction Switch 2 - Instrument Panel.

Parking Assist Switch Indicator Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel, ignition ON.
  2. Verify a test lamp illuminates between the control circuit terminal 3 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 S48D Multifunction Switch 2 - Instrument Panel. Disconnect the X1 harness connector at the K124 Active Safety 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 S48D Multifunction Switch 2 - Instrument Panel.
    2. Test for infinite resistance between the S48D Multifunction Switch 2 - Instrument Panel control circuit terminal 2 and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • If infinite resistance, replace the S48D Multifunction Switch 2 - Instrument Panel.
    • If the parking assist switch indicator is not illuminated 
  5. Connect a 3 A fused jumper wire between the control circuit terminal 2 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 S48D Multifunction Switch 2 - 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 S48D Multifunction Switch 2 - Instrument Panel.
    • If the parking assist switch indicator is illuminated 
  7. Replace the K124 Active Safety Control Module.
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