Diagnostic Routine J

Diagnostic Routine J

Diagnostic Overview

U1007:31

Refer to Wiring Diagram Set 12 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

The battery current sensor is a Hall-effect sensor attached to the battery ground cable. It is supplied a 5 volt reference and ground from the BCM (Body Control Module). The BCM (Body Control Module) reads the battery current sensor feedback voltage to determine how much current is flowing through the battery ground cable.

DTC (Diagnostic Trouble Code) Fault Trigger Conditions






Visual Inspection and Diagnostic Pre-checks

- Inspect the battery current sensor.

- Inspect the wiring, terminals or connectors.

- Inspect for loose or corroded connections.

Pinpoint Test

1. CHECK THE BATTERY CURRENT SENSOR

1. Inspect the battery current sensor for the following:

- Physical damage
- Corrosion
- Disconnected electrical connector
- Disconnected from battery ground cable
- Debris between the battery current sensor and the battery ground cable

Are any of these conditions found during inspection?






2. CHECK THE BATTERY CURRENT SENSOR REFERENCE VOLTAGE CIRCUIT

1. Ignition OFF.

2. Disconnect: Battery Current Sensor.

3. Ignition ON.

4. Measure:





Is the voltage between 4.7 and 5.1 volts?






3. CHECK THE BATTERY CURRENT SENSOR REFERENCE VOLTAGE CIRCUIT FOR A SHORT TO VOLTAGE

1. Ignition OFF.

2. Disconnect: BCM (Body Control Module) C2280F.

3. Remove the RUN/START relay.

4. Connect a fused jumper wire:





5. Ignition ON.

6. Measure:





Is any voltage present?






4. CHECK THE BATTERY CURRENT SENSOR REFERENCE VOLTAGE CIRCUIT FOR A SHORT TO GROUND

1. Ignition OFF.

2. Disconnect: BCM (Body Control Module) C2280F.

3. Measure:





Is the resistance greater than 10,000 ohms?






5. CHECK THE BATTERY CURRENT SENSOR REFERENCE VOLTAGE CIRCUIT FOR AN OPEN

1. Measure:





Is the resistance less than 3 ohms?






6. CHECK THE BATTERY CURRENT SENSOR SIGNAL RETURN CIRCUIT

1. Measure:





Is the voltage between 4.7 and 5.1 volts?






7. CHECK THE BATTERY CURRENT SENSOR SIGNAL RETURN CIRCUIT FOR VOLTAGE

1. Measure:





Is any voltage present?






8. CHECK THE BATTERY CURRENT SENSOR SIGNAL RETURN CIRCUIT FOR AN OPEN

1. Ignition OFF.

2. Disconnect: BCM (Body Control Module) C2280F.

3. Measure:





Is the resistance less than 3 ohms?






9. CHECK THE BATTERY CURRENT SENSOR FEEDBACK CIRCUIT FOR A SHORT TO VOLTAGE

1. Ignition OFF.

2. Disconnect: BCM (Body Control Module) C2280F.

3. Remove the RUN/START relay.

4. Connect a fused jumper wire:





5. Ignition ON.

6. Measure:





Is any voltage present?






10. CHECK THE BATTERY CURRENT SENSOR FEEDBACK CIRCUIT FOR A SHORT TO GROUND

1. Ignition OFF.

2. Measure:





Is the resistance greater than 10,000 ohms?






11. CHECK THE BATTERY CURRENT SENSOR FEEDBACK CIRCUIT FOR AN OPEN

1. Measure:





Is the resistance less than 3 ohms?






12. CHECK THE BATTERY CURRENT SENSOR FEEDBACK CIRCUIT FOR A SHORT TO THE SIGNAL RETURN OR REFERENCE CIRCUIT

1. Measure:





Are the resistances greater than 10,000 ohms?






13. CHECK THE BATTERY CURRENT SENSOR CONNECTION

1. Ignition OFF.

2. Disconnect: Battery Current Sensor (if not previously disconnected).

3. Inspect the battery current sensor connector for:

- corrosion
- pushed-out terminals
- damaged terminals

4. Connect and correctly seat the battery current sensor connector.

5. Connect: BCM (Body Control Module) C2280F.

6. Ignition ON.

7. Clear the DTCs (Diagnostic Trouble Codes).

8. Using a scan tool, perform BCM (Body Control Module) self-test.

Did the DTC (Diagnostic Trouble Code) return?






14. CHECK FOR CORRECT BCM (Body Control Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect all BCM (Body Control Module) connectors.

3. Repair:

- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

4. Reconnect the BCM (Body Control Module) connectors. Make sure they seat and latch correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?