For 1990-2009 cars

## DTC B1516 Current

### 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
DTC B1516 66: Battery Current Sensor Wrong Mounting Position

### Diagnostic 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, B1516 66
Low Reference | -- | 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 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

#### B1516 08

The battery current signal is less than 4 percent or greater than 96 percent duty cycle for 2 minutes.

#### B1516 66

The battery current polarity is positive 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 returns to the normal range for 15 seconds.

### Diagnostic Aids

DTC B1516 08 could be set by overcharging with a battery charger or jump starting.

### Reference Information

#### Schematic Reference

• | Starting and Charging Schematics

• | Body Control System Schematics

#### Connector End View Reference

#### Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

for scan tool information

### Circuit/System Testing

#### B1516 08

1. Ignition OFF, disconnect the harness connector at the battery current sensor.
2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 Ω between the low reference circuit terminal B and ground.

⇒ | If greater than specified range , test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the BCM.

3. Ignition ON, test for 4.8-5.2 V between the 5-volt reference circuit terminal A and ground.

⇒ | 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.

4. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal C and ground.

⇒ | 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.

5. If all circuits test normal, replace the battery current sensor.

#### B1516 66

1. Verify that the battery current sensor is installed securely around the negative battery cable, with the tape tab pointing away from the negative terminal on the battery.

⇒ | If the battery current sensor is not installed correctly, remove and reinstall the sensor properly.

2. Replace the battery current sensor.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Battery Negative Cable Replacement for battery current sensor replacement.

• | Control Module References for BCM replacement, setup, and programming