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Home >> GMC >> 2013 >> Sierra 1500 XFE >> Repair and Diagnosis >> External Pages >> Different car >> Section 2721 (Object Detection System And Pedestrian Protection System) >> Diagnostic Information and Procedures >> DTC B0954, B0955, B0956, or B0957: Parking Assist Front Sensor >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON.
  2. Verify that DTC B1405 is not set.
    • If the DTC is not set 
  3. Verify that DTC B0954 01, B0955 01, B0956 01, B0957 01 B0954 22, B0955 22, B0956 22 or B0957 22 is not set.
    • If the DTC is set 
    1. Verify the B78 Front Object Sensors are not contaminated with snow, mud, dirt, slush, or ice.
      • If contaminated, clean the B78 Front Object Sensors.
      • If there is no contamination
    2. Refer to Circuit/System Testing.
    • If the DTC is not set 
  4. Verify that DTC B0954 3A, B0955 3A, B0956 3A or B0957 3A is not set.
    • If the DTC is set 

      Replace the appropriate B78 Front Object Sensor with the correct sensor type.

    • If the DTC is not set 
  5. Ignition ON, transmission in R.
  6. Verify the scan tool Parking Assist System Status parameter is Enabled.
    • If the parameter is Disabled 

      Refer to Circuit/System Testing.

    • If the parameter is Enabled 
  7. All OK.
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