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Home >> Buick >> 2019 >> Envision Base >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Driver Assistance Systems >> Diagnostic Information and Procedures >> DTC B390A >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify DTC B390A 08 or DTC B390A 45 is not set.
    • If either DTC is set 
    1. Verify the DTC did not set immediately after replacement or programming of the B233 Radar Sensor Module - Short Range.
      • If the DTC set immediately after replacement or programming, ensure both the programming and set-up steps have been completed in SPS.
      • Go to next step: If the DTC did not set immediately after replacement or programming
    2. Program the appropriate B233 Radar Sensor Module - Short Range. Make sure to perform both the programming and set-ups steps in SPS.
    3. Verify DTC B390A 08 or DTC B390A 45 is not set after programming and set-up.
      • If either DTC sets after programming, replace the appropriate B233 Radar Sensor Module - Short Range.
      • Go to next step: If the DTC does not set
    4. All OK.
    • Go to next step: If both DTCs arenot set 
  3. Verify DTC B390A 54 is not set.
    • If the DTC is set 

      Replace the appropriate B233 Radar Sensor Module - Short Range.

    • Go to next step: If the DTC is not set 
  4. Verify DTC B390A 58 is not set.
    • If DTC is set 
    1. Verify the area in front of the appropriate B233 Radar Sensor Module - Short Range is clean, unobstructed, and damage-free.
      • If not clean, unobstructed, and damage-free, clean or repair as necessary.
      • Go to next step: If clean, unobstructed, and damage-free
    2. Clear DTCs.
    3. Driver the vehicle 4.8-8.0 km (3 - 5 miles) at speeds greater than 9 km/h (6 mph) in normal traffic conditions.
    4. Verify the DTC does not reset.
      • If the DTC resets, replace the appropriate B233 Radar Sensor Module - Short Range.
      • Go to next step: If the DTC does not reset.
    5. All OK.
    • Go to next step: If DTC is not set 
  5. Verify DTC B390A 67 is not set.
    • If the DTC is set in more than one B233 Radar Sensor Module - Short Range 
    1. Verify none of the B233 Radar Sensor Module - Short Range have not been swapped side to side.
      • If any B233 Radar Sensor Module - Short Range have been swapped, return them to their original position.
      • Go to next step: If none of the B233 Radar Sensor Module - Short Range have been swapped
    2. Replace the appropriate B233 Radar Sensor Module - Short Range.
    • If the DTC is set in only one B233 Radar Sensor Module - Short Range 

      Replace the appropriate B233 Radar Sensor Module - Short Range.

    • Go to next step: If the DTC is not set 
  6. All OK.
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