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Home >> Buick >> 2013 >> Verano Premium, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Object Detection System - Park Assist System) >> Diagnostic Information and Procedures >> DTC B0958, B0959, B0960, or B0961 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2012 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

Scan Tool must be disconnected for steps 1 and 2 to allow module to power down.

  1. Ignition OFF for 1 min, disconnect the harness connector at the appropriate rear object sensor.
  2. Test for less than 30 Ω between the low reference circuit terminal 2 and ground.
    • If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K41 front and rear parking assist control module.
  3. Ignition ON, activate the parking assist, test for 7.5-9.0 V between the 8 V reference circuit terminal 1 and ground.
    • If less than the specified range, test the 8 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K41 front and rear parking assist control module.
    • If greater than the specified range, test the 8 V reference circuit for short to voltage. If the circuit tests normal, replace the K41 front and rear parking assist control module.
  4. Activate the parking assist, test for 7.5-9.0 V between the signal circuit terminal 3 and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K41 front and rear parking assist control module.
    • If greater than the specified range, test the signal circuit for short to voltage. If the circuit tests normal, replace the K41 front and rear parking assist control module.
  5. If all circuits test normal, replace the appropriate B78 rear object sensor.
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