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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1758 (Object Detection System - Park Assist System) >> Diagnostic Information and Procedures >> Side Object Sensor Malfunction >> Circuit/System Testing
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Circuit/System Testing

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Right Side Object Sensor Malfunction

  1. Ignition OFF, disconnect the harness connector at the right side object sensor.
  2. Test for less than 5 Ω between the ground circuit terminals listed below and ground:
    • Terminal 5
    • Terminal 6
    • If greater than the specified range, test the appropriate ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the right side object sensor.

Left Side Object Sensor Malfunction

  1. Ignition OFF, disconnect the harness connector at the left side object sensor.
  2. Test for less than 5 Ω between the ground circuit terminal 5 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Ignition OFF, disconnect the harness connector at the right side object sensor.
  5. Ignition ON, test for less than 1 V between the serial data circuit terminal 4 and ground.
    • If greater than the specified range, test the serial data circuit for a short to voltage.
  6. Test for infinite resistance between the serial data circuit terminal 4 and ground.
    • If not the specified value, test the serial data circuit for a short to ground.
  7. Test for less than 2 Ω between the serial data circuit terminal 4 at the left side object sensor harness connector and the serial data circuit terminal 4 at the right side object sensor harness connector.
    • If greater than the specified range, test the serial data circuit for an open/high resistance.
  8. If all circuits test normal, replace the left side object sensor.

Side Object Indicator Malfunction

  1. Ignition OFF, disconnect the X3 and X7 harness connectors at the appropriate door lock/window switch.
  2. Apply ground to the low reference circuit X3 terminal 8.
    • If the blind zone indicator in the outside rearview mirror illuminates, test the control circuit X7 terminal 8 for short to voltage.
  3. Apply battery voltage to X7 terminal 8 and ground to X3 terminal 8.
    • If the blind zone indicator in the outside rearview mirror does not illuminate, test the control circuit X7 terminal 8 and reference circuit X3 terminal 8 for short to ground or an open/high resistance.
  4. If all circuits test normal, test or replace the appropriate outside rearview mirror.
  5. Verify blind zone indicator functions, if not test or replace the appropriate door lock/window switch.
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