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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 B3596 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
    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.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector:S26 Hazard Warning Switch
  3. Test for less than 10 ohms between the test points:Ground circuit terminal 1 & Ground
    • If 10 ohms or greater 
    1. Test for less than 2 ohms between the test points:Ground circuit terminal 1 @ S26 Hazard Warning Switch & 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 10 ohms 
  4. Ignition - On / Vehicle - In Service Mode
  5. Connect a test lamp between the test points:Control circuit terminal 4 & Ground circuit terminal 1
  6. Perform the scan tool control function:Command State - Hazard Indicator Control - On and Off
    • If the test lamp is always Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:X1 @ K9 Body Control Module
    3. Test for infinite resistance between the test points:Control circuit terminal 4 @ S26 Hazard Warning Switch & 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:Control circuit terminal 4 @ S26 Hazard Warning Switch & Control circuit terminal 17X1 @ K9 Body Control Module
      • 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
    • Go to next step: If the test lamp is always On 
  7. Ignition/Vehicle - Off & Remove - Test lamp
  8. Disconnect the electrical connector:X1 @ K9 Body Control Module
  9. Ignition - On / Vehicle - In Service Mode
  10. Test for less than 1 V between the test points:Control circuit terminal 4 @ S26 Hazard Warning Switch & 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 
  11. Test or replace the component:S26 Hazard Warning Switch
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