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 InvalidDTC B1516 66 : Battery Current Sensor Wrong Mounting Position
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Battery Current Sensor Supply Voltage | B1516 08 | B1516 08 | -- | -- |
Battery Current Sensor Signal Circuit | B1516 08 | B1516 08 | -- | -- |
Battery Current Sensor Low Reference Circuit | -- | B1516 08 | -- | -- |
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 instrument panel module (IPM). It creates a 10-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
B1516 08
The IPM detects a duty cycle of PWM input signal is less than 4 percent or more than 96 percent for more 33 seconds.
B1516 66
The IPM detects the battery current sensor is improperly installed.
Action Taken When the DTC Sets
The SERVICE VEHICLE SOON warning message will be illuminated in the driver information center (DIC).
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
Connector End View Reference
Electrical Information Reference
Circuit/System Verification
When diagnosing B1516 66 verify that the battery current sensor is installed securely and positioned in the correct current flow direction.
| ⇒ | If the battery current sensor is not, remove and reinstall the sensor properly. |
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the battery current sensor.
- Ignition OFF, test for less than 1.0 ohm of resistance between the low reference circuit terminal B and ground.
- Ignition ON, test for 10 volts between the battery current sensor supply voltage circuit terminal A and ground.
- Test for 10 volts between the battery current sensor signal circuit and ground.
- If all circuits test normal test or replace the battery current sensor.
| ⇒ | If the greater than the specified range, test the low reference circuit for an open/high resistance the circuit tests normal replace the IPM. |
| ⇒ | If less than the specified range , test the battery current sensor supply voltage circuit for a short to ground or an open/high resistance. If the circuit test normal replace the IPM. |
| ⇒ | If less than 10 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 IPM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for IPM replacement, setup, and programming |
