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Home >> Chevrolet >> 2012 >> Volt >> Repair and Diagnosis >> External Pages >> Different car >> Section 35 (Lighting System) >> Diagnostic Information and Procedures >> Automatic Light Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2011 Chevrolet Volt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the B10B Ambient Light/Sunload Sensor.
  2. Test for less than 5 Ω between ground circuit harness connector terminal 6 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance.
  3. Ignition ON, test for 4.8-5.2 V between B10B Ambient Light/Sunload Sensor signal circuit harness connector terminal 5 and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
  4. If all circuits test normal, replace the B10B Ambient Light/Sunload Sensor.
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