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B1516 08

  1. Ignition OFF, disconnect the harness connector at the battery current sensor.
  2. Ignition OFF, remove the BCM 1 fuse and BCM 3 fuse, and wait 45 seconds. Test for less than 5 Ω 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. Install the BCM 1 fuse and BCM 3 fuse.
  4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal A and ground.
    • If less than the specified range, test the 5 V reference circuit terminal A for a short to ground or an open/high resistance. If the circuit tests normal, then replace the BCM.
    • If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, then replace the BCM.
  5. Verify the scan tool Battery Current parameter is greater than 55 amps.
    • If less than the specified range, test the signal circuit terminal C for a short to ground. If the circuit tests normal, replace the BCM.
  6. Install a 3 A fused jumper wire between the signal circuit terminal C and the low reference circuit terminal B. Verify the scan tool Battery Current parameter is less than -55 amps.
    • If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  7. If all circuits test normal, replace the battery current sensor.
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