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Home >> Chevrolet >> 2009 >> Uplander Base, 3.9 M >> Repair and Diagnosis >> Electrical >> Charging Systems >> Engine Electrical >> Diagnostic Information and Procedures >> DTC B1516 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the battery current sensor.
  2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the low reference circuit terminal B and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance.
  3. Ignition ON, test for greater than 4.5 volts between the supply voltage circuit terminal A and ground.
    • If less than the specified range, disconnect the headlamp switch. If the circuit tests normal, replace the headlamp switch. Test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. Ignition ON, test for greater than 4.5 volts between the signal circuit terminal C and ground.
    • 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 BCM.
  5. If all circuits test normal, replace the battery current sensor.
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