2010 Cadillac Truck SRX FWD V6-3.0L Page 226

2010 Cadillac Truck SRX FWD V6-3.0L Page 226

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

* Control Module References (See: Testing and Inspection/Programming and Relearning)for BCM replacement, programming and setup

B147F

DTC B147F

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 Descriptor

DTC B147F 02

- Battery Saver Relay Reset Secondary Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

The battery saver mode reduces the parasitic load of some modules during overseas shipment or during vehicle storage conditions. This improves

the drain time on the battery (up to 70 days without the battery going dead). When the vehicle is in transport/storage, some features may have

reduced functionality while in the battery saver mode, such as disabling the Remote Function Actuator or content theft features.

The battery saver mode incorporates a latching relay that when enabled disconnects some modules from their ignition off power or memory power

sources. For vehicles built before the mid-year 2010 model year or not flashed with 2010 model year, or newer, software, battery saver mode is

initiated by starting the vehicle and then turning the ignition key into the crank position or pushing the push button start switch (if equipped) for

greater than 15 seconds. For vehicles built after the mid-year 2010 model year or flashed with 2010 model year, or newer, software, battery saver

mode is initiated by turning on the hazard flashers, starting the vehicle, and then turning the ignition key into the crank position or pushing the push

button start switch (if equipped) for greater than 15 seconds. The mode is disengaged by repeating the previous process causing the relay to latch in

the other direction. This feature can be used as many times as necessary if the vehicle is to be stored for an extended period of time.

Conditions for Running the DTC

* The system voltage is between 9-16 V.

* The DTC can only run when the output is activated.

Conditions for Setting the DTC

The BCM detects a short to ground in the battery saver relay reset circuit.

Action Taken When the DTC Sets

The module output driver will be shut down and not supply voltage to the battery saver relay reset circuit.

Conditions for Clearing the DTC

* The current DTC will clear when the module request for the output is removed or the malfunction is no longer present.

* A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.

Reference Information

Schematic Reference

* Body Control System Schematics (See: Body and Frame/Body Control Systems/Diagrams/Electrical Diagrams)

* Power Distribution Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System

Diagram/Power Distribution Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation