Circuit/System Testing

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.

B1516 66

1. Verify that the battery current sensor is installed securely around the positive battery cable, with the tape tab pointing toward the positive terminal on the battery.
   • If the battery current sensor is not installed correctly, remove and reinstall the sensor.
2. If all circuits test normal, replace the battery current sensor.