Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC B1516 08: Battery Current Sensor Signal Invalid - 12 VDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
5-Volt Reference | B1516 08 | B1516 08 | -- | -- |
Signal | B1516 08 | B1516 08 | B1516 08 | B1516 08 |
Low Reference | -- | B1516 08 | -- | -- |
Typical Scan Tool Data
Circuit | Short to Ground | Open | Short to Voltage |
|---|---|---|---|
Operating Conditions: Ignition ON, engine OFF. Headlamps and all accessories Off. Parameter Normal Range: -5 amps to -10 amps | |||
5-Volt Reference | -59.9 amps | -59.9 amps | -- |
Signal | -59.9 amps | 59.9 amps | 59.9 amps |
Low Reference | -- | 59.9 amps | -- |
Circuit/System Description
The 12 V 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 V pulse width modulation (PWM) signal of 128 Hz. Normal duty cycle is between 5-95 percent.
Conditions for Running the DTC
The BCM is awake.
Conditions for Setting the DTC
The BCM detects that the duty cycle of the battery current sensor signal is less than 4 percent or greater than 96 percent for 2 minutes.
Action Taken When the DTC Sets
The regulated voltage control (RVC) is disabled.
Conditions for Clearing the DTC
The DTC passes when the battery current sensor duty cycle returns to normal range for 15 seconds.
Reference Information
Schematic Reference
Starting and Charging Schematics
Connector End View Reference
Description and Operation
Charging System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, engine OFF, headlamps and all accessories OFF, observe the scan tool BCM Battery Current parameter. The reading should be between -5 amps and -10 amps, and change with the amount of current draw on the battery.
Circuit/System Testing
- Verify that the current sensor is mounted correctly. The sensor should be installed with the coil around the positive battery cable, with the tape tab pointing toward the battery.
- Ignition OFF, disconnect the battery current sensor.
- 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.
- Ignition ON, test for 4.5-5.5 V on the 5 V reference circuit terminal A.
- Ignition ON, test for 4.5-5.5 V on the signal circuit terminal C.
- If all circuits test normal, replace the battery current sensor.
| ⇒ | 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. |
| ⇒ | 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. |
| ⇒ | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming. |
