2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 447

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 447

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.

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

B1433

DTC B1433

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 B1433 00

- Ignition Switched Power Relay 2 Circuit

Diagnostic Fault Information

Circuit/System Description

The body control module (BCM) supplies voltage to the HVAC module and the windshield washer solvent heater (RPO XA7). Voltage is applied

when any of the following conditions are true:

* Ignition Switch is in ACC or RUN.

* The vehicle was remote started.

* The vehicle is in retained accessory power (RAP) mode.

Conditions for Running the DTC

* The system voltage is between 9-16 V.

* The DTC can only set when the output is actively being requested by the module.

Conditions for Setting the DTC

The DTC will set only when the module requests the output and there is a short to ground in the run relay coil control circuit.

Action Taken When the DTC Sets

The module output driver will be shut down and not supply voltage to the 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.

Diagnostic Aids

A short to voltage may cause some accessories to operate with the ignition key out and cause a low battery after extended non vehicle use.

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)