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Home >> Chevrolet >> 2017 >> Traverse LS Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC B2600: Daytime Running Lamp Control Circuit >> Circuit/System Testing

Circuit/System Testing

B2600

  1. Ignition OFF, disconnect the KR42L Daytime Running Lamp Relay - Left, ignition ON.
  2. Verify a test lamp illuminates between the B+ circuit terminal 86 and ground.
    • If the test lamp does not illuminate 

      Replace the X51A Fuse Block - Instrument Panel.

    • If the test lamp illuminates 
  3. Verify a test lamp illuminates between the B+ circuit terminal 30 and ground.
    • If the test lamp does not illuminate 

      Replace the X51A Fuse Block - Instrument Panel.

    • If the test lamp illuminates 
  4. Connect a test lamp between the control circuit terminal 85 and B+, ignition ON.
  5. Verify the test lamp turns ON and OFF when commanding the Daytime Running Lamps ON and OFF with a scan tool.
    • If the test lamp is always OFF 
    1. Ignition OFF, disconnect the X7 harness connector at the K9 Body Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit terminal and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Ignition OFF.
    4. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K9 Body Control Module.
    • If the test lamp is always ON 
    1. Ignition OFF, disconnect the X7 harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between the control circuit terminal and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K9 Body Control Module.
    • If the test lamp turns ON and OFF 
  6. Test or replace the KR42L Daytime Running Lamp Relay - Left.

B2600 - W49 without CZ2

  1. Ignition OFF, disconnect the KR42 Daytime Running Lamps Relay, ignition ON.
  2. Verify a test lamp illuminates between the B+ circuit terminal 86 and ground.
    • If the test lamp does not illuminate 

      Replace the X51A Fuse Block - Instrument Panel.

    • If the test lamp illuminates 
  3. Verify a test lamp illuminates between the B+ circuit terminal 30 and ground.
    • If the test lamp does not illuminate 

      Replace the X51A Fuse Block - Instrument Panel.

    • If the test lamp illuminates 
  4. Connect a test lamp between the control circuit terminal 85 and B+, ignition ON.
  5. Verify the test lamp turns ON and OFF when commanding the Daytime Running Lamps ON and OFF with a scan tool.
    • If the test lamp is always OFF 
    1. Ignition OFF, disconnect the X5 harness connector at the K9 Body Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit terminal and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Ignition OFF.
    4. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K9 Body Control Module.
    • If the test lamp is always ON 
    1. Ignition OFF, disconnect the X5 harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between the control circuit terminal and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K9 Body Control Module.
    • If the test lamp turns ON and OFF 
  6. Test or replace the KR42 Daytime Running Lamps Relay.
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