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Home >> Chevrolet >> 2017 >> City Express LS >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection And Pedestrian Protection System >> Diagnostic Information And Procedures >> DTC 023: Parking Assist Switch >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S107 Parking Assist ON/OFF Switch. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 Ω between the control circuit terminal 8 and ground.
    • If greater than 10 Ω 
    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 circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 Ω 
  3. Ignition ON.
  4. Verify a test lamp illuminates between the control circuit terminal 6 and ground.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    3. Test for less than 2 Ω in the 12 V reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K41R Rear Parking Assist Control Module.
    • Go to next step: If the test lamp illuminates 
  5. Test or replace the S107 Parking Assist ON/OFF Switch.
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