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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Lighting System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B3881 or B3882 >> Circuit/System Testing

Circuit/System Testing

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DTC B3881

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector:X1 @ K9 Body Control Module
  3. Ignition - On / Vehicle - In Service Mode
  4. Verify a test lamp turns On between the test points:B+ circuit terminal 3 & Ground
    • If the test lamp does not turn On and the circuit fuse is OK 
    1. Ignition/Vehicle - Off
    2. Remove the component:F8DA @ X51A Fuse Block - Instrument Panel
    3. Test for less than 2 ohms between the test points:B+ circuit terminal 3 @ Control module harness & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • Go to next step: If less than 2 ohms - Verify the fuse is OK and there is voltage at the fuse.
    • If the test lamp does not turn On and the circuit fuse is open 
    1. Ignition/Vehicle - Off
    2. Remove the component:F8DA @ X51A Fuse Block - Instrument Panel
    3. Test for infinite resistance between the test points:B+ circuit terminal 3 @ Control module harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component:K9 Body Control Module
    • Go to next step: If the test lamp turns On 
  5. Ignition/Vehicle & All vehicle systems - Off
  6. Connect the electrical connector:X1 @ K9 Body Control Module
  7. Disconnect the appropriate electrical connector:
    • { Without UGE } E5AA Tail/Stop Lamp - Left
    • { With UGE } E42L Tail Lamp Assembly - Left - X410
    8. NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  8. Test for less than 15 ohms between the test points:
    • { Without UGE } Ground circuit terminal B Terminal B & Ground (-UGE)
    • { With UGE } Ground circuit terminal 1 & Ground (UGE)
    • If 15 ohms or greater 
    1. Ignition/Vehicle - Off
    2. Test for less than 2 ohms between the test points:

      { Without UGE } Ground circuit terminal B & Ground terminal

      { With UGE } Ground circuit terminal 1 & Ground terminal

      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 15 ohms 
  9. Connect a test lamp between the test points:
    • { Without UGE } Control circuit terminal A & Ground
    • { With UGE } Control circuit terminal 2 & Ground
  10. Ignition - On / Vehicle - In Service Mode
  11. Perform the scan tool control function:Left Rear Stop/Park Lamp - On and Off

    Verify the test lamp turns On and Off.

    • If the test lamp is always Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:X4 @ K9 Body Control Module
    3. Test for infinite resistance between the test points:Control circuit terminal 7 @ Control module harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points:

      { Without UGE } Control circuit terminal 7 @ Control module harness & Control circuit terminal A @ Component harness

      { With UGE } Control circuit terminal 7 @ Control module harness & Control circuit terminal 2 @ Component harness

      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K9 Body Control Module
    • If the test lamp is always On 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:X4 @ K9 Body Control Module
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:

      Control circuit terminal 7 @ Control module harness & Ground

      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component:K9 Body Control Module
    • Go to next step: If the test lamp turns On and Off 
  12. Test or replace the component:
    • { Without UGE } E5AA Tail/Stop Lamp - Left
    • { With UGE } E42L Tail Lamp Assembly - Left

DTC B3882

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector:X1 @ K9 Body Control Module
  3. Ignition - On / Vehicle - In Service Mode
  4. Verify a test lamp turns On between the test points:B+ circuit terminal 2 & Ground
    • If the test lamp does not turn On and the circuit fuse is OK 
    1. Ignition/Vehicle - Off
    2. Remove the component:F21DA @ X51A Fuse Block - Instrument Panel
    3. Test for less than 2 ohms between the test points:B+ circuit terminal 3 @ Control module harness & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • Go to next step: If less than 2 ohms - Verify the fuse is OK and there is voltage at the fuse.
    • If the test lamp does not turn On and the circuit fuse is open 
    1. Ignition/Vehicle - Off
    2. Remove the component:F21DA @ X51A Fuse Block - Instrument Panel
    3. Test for infinite resistance between the test points:B+ circuit terminal 2 @ Control module harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component:K9 Body Control Module
    • Go to next step: If the test lamp turns On 
  5. Ignition/Vehicle & All vehicle systems - Off
  6. Connect the electrical connector:X1 @ K9 Body Control Module
  7. Disconnect the appropriate electrical connector:
    • { Without UGE } E5AB Tail/Stop Lamp - Right
    • { With UGE } E42R Tail Lamp Assembly - Right - X420
    8. NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  8. Test for less than 15 ohms between the test points:
    • { Without UGE } Ground circuit terminal B Terminal B & Ground (-UGE)
    • { With UGE } Ground circuit terminal 1 & Ground (UGE)
    • If 15 ohms or greater 
    1. Ignition/Vehicle - Off
    2. Test for less than 2 ohms between the test points:

      { Without UGE } Ground circuit terminal B & Ground terminal

      { With UGE } Ground circuit terminal 1 & Ground terminal

      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 15 ohms 
  9. Connect a test lamp between the test points:
    • { Without UGE } Control circuit terminal A & Ground
    • { With UGE } Control circuit terminal 2 & Ground
  10. Ignition - On / Vehicle - In Service Mode
  11. Perform the scan tool control function:Right Rear Stop/Park Lamp - On and Off

    Verify the test lamp turns On and Off.

    • If the test lamp is always Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:X5 @ K9 Body Control Module
    3. Test for infinite resistance between the test points:Control circuit terminal 7 @ Control module harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points:

      { Without UGE } Control circuit terminal 7 @ Control module harness & Control circuit terminal A @ Component harness

      { With UGE } Control circuit terminal 7 @ Control module harness & Control circuit terminal 2 @ Component harness

      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K9 Body Control Module
    • If the test lamp is always On 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:X5 @ K9 Body Control Module
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:

      Control circuit terminal 7 @ Control module harness & Ground

      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 V - Replace the component:K9 Body Control Module
    • Go to next step: If the test lamp turns On and Off 
  12. Test or replace the component:
    • { Without UGE } E5AB Tail/Stop Lamp - Right
    • { With UGE } E42R Tail Lamp Assembly - Right
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