2010 Cadillac CTS Sedan AWD V6-3.6L Page 398

2010 Cadillac CTS Sedan AWD V6-3.6L Page 398

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

B1516

DTC B1516

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/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/System Description

The battery current sensor is a 3-wire hall effect current sensor. The body control module (BCM) supplies 5 V and ground to the battery current

sensor. The battery current sensor measures the amount of current flowing to or from the battery, and supplies a pulse width modulation (PWM)

signal to the BCM. The BCM monitors the battery current signal, and sets DTC B1516 08 if the signal is outside the normal range if 4-96 percent

duty cycle. The BCM also monitors the current polarity, and sets DTC B1516 66 if reverse polarity is detected.

Conditions for Running the DTC

B1516 08

The BCM is awake.

B1516 66

* The BCM is awake.

* The engine is OFF.

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.