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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1427 (Battery, Charging System And Starting System) >> Diagnostic Information and Procedures >> DTC B1516 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify that the current sensor is mounted correctly. The sensor should be installed with the coil around the battery negative cable, with the tape tab pointing toward the battery.
  2. Ignition OFF, disconnect the battery current sensor.
  3. Ignition OFF and scan tool disconnected, remove the 60A IP BEC fuse from the underhood fuse block. Test for less than 5 Ω between the low reference circuit terminal B and ground.
    • If greater than the specified value, test the current sensor low reference circuit and the BCM ground circuits for an open/high resistance. If the circuits test normal, replace the BCM.
  4. Ignition ON, test for 4.5-5.5 V on the 5 V reference circuit terminal A.
    • If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
    • If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the BCM.
  5. Ignition ON, test for 4.5-5.5 V on the signal circuit terminal C.
    • 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.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
  6. If all circuits test normal, replace the battery current sensor.
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