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Home >> Chevrolet >> 2011 >> Volt >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Lighting System) >> Diagnostic Information and Procedures >> DTC B2610 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2012 Chevrolet Volt. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:

    Each component with backlighting may need to be disconnected to isolate a short to voltage or short to ground. Use the schematics to identify the following:

    • Backlighting components the vehicle is equipped with
    • Each component's control and ground circuit terminals
    • Component locations on the backlighting control circuit
  1. Vehicle OFF, all doors closed, all accessories OFF, disconnect the harness connector at the component with inoperative backlighting. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 15 Ω between the appropriate ground circuit terminal listed below and ground.
    • E37F dome/reading lamps - front - terminal 6
    • S16 driver information center switch - terminal 4
    • S25 garage door opener switch - terminal 3
    • S48B multifunction switch - overhead console - terminal 2
    • S52 outside rearview mirror switch - terminal 11
    • S70R steering wheel controls switch - right - terminal 5
    • S70L steering wheel controls switch - left - terminal 7
    • S91 park brake control switch - terminal 8
    • S83 vehicle ON/OFF switch - terminal 4
    • S113 charge port door open request switch - terminal 4
    • S117 refuel request switch - terminal 4
    • If 15 Ω or greater 
    1. Vehicle OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 15 Ω 
  3. Connect a test lamp between the appropriate control circuit terminal listed below and ground.
    • E37F dome/reading lamps - front - terminal 3
    • S16 driver information center switch - terminal 3
    • S25 garage door opener switch - terminal 2
    • S48B multifunction switch - overhead console - terminal 1
    • S52 outside rearview mirror switch - terminal 1
    • S70R steering wheel controls switch - right - terminal 4
    • S70L steering wheel controls switch - left - terminal 6
    • S83 vehicle ON/OFF switch - terminal 8
    • S91 park brake control switch - terminal 6
    • S113 charge port door open request switch - terminal 5
    • S117 refuel request switch - terminal 5
  4. Verify the test lamp turns ON and OFF when commanding the LED Backlight Dimming ON and OFF with a scan tool.
    • If the test lamp is always OFF 
    1. Vehicle OFF, disconnect the X2 and X7 harness connectors at the K9 body control module.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. 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. Vehicle OFF, disconnect the X2 and X7 harness connectors at the K9 body control module, vehicle in Service Mode
    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, replace the K9 body control module.
    • If the test lamp turns ON and OFF 
  5. Test or replace the component with inoperative backlighting.
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