DTC Descriptor
DTC B1405: Device Voltage Reference Output 2 CircuitDiagnostic Fault Information
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Battery Current Sensor Supply Voltage Circuit | B1405 | B1405 | -- | -- |
Battery Current Sensor Signal Circuit | B1405 | B1405 | -- | -- |
Battery Current Sensor Low Reference Circuit | -- | B1405 | -- | -- |
Circuit/System Description
The battery current sensor is a 3-wire hall effect current sensor. The battery current sensor monitors the battery current. It directly inputs to the body control module (BCM). It creates a 5-volt pulse width modulation (PWM) signal of 128 Hz with a duty cycle of 0-100 percent. Normal duty cycle is between 5-95 percent. Between 0-5 percent and 95-100 percent are for diagnostic purposes.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The engine is running. |
Conditions for Setting the DTC
The BCM detects a duty cycle of PWM input signal is less than 4 percent or more than 96 percent for more 33 seconds.
Action Taken When the DTC Sets
The DTC sets as current , no driver indication or message is displayed.
Conditions for Clearing the DTC
The DTC clears as current status when the battery sensed current returns to normal range for more than 5 seconds.
Reference Information
Schematic Reference
Starting and Charging Schematics
Connector End View Reference
Engine Electrical Connector End Views
Electrical Information Reference
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the battery current sensor.
- Ignition OFF, verify a test lamp illuminates between B+ and the low reference circuit terminal B.
- Ignition ON, test for 5 volts between the battery current sensor supply voltage circuit terminal A and ground.
- Test for 5 volts between the battery current sensor signal circuit terminal C and ground.
- If all circuits test normal test or replace the battery current sensor.
| ⇒ | If the test lamp did not illuminate , test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the BCM. |
| ⇒ | If less than the specified range , test the battery current sensor supply voltage circuit terminal A for a short to ground or an open/high resistance. If the circuit test normal replace the BCM. |
| ⇒ | If less than 5 volts test the battery current sensor signal circuit terminal C for a short to ground or an open/high resistance. If the circuit test normal replace the BCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup, and programming
