B1433

DTC B1433

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions 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 [1][2]Body Control Systems
* Power Distribution Schematics Power Distribution Schematics

Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)
Description and Operation

Retained Accessory Power Description and Operation Retained Accessory Power
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the X5 harness connector at the BCM.
2. Test for greater than infinite resistance between the BCM ignition circuit terminal 13 and ground.

• If less than specified, test for a short to ground.

3. If the circuit tests normal, test or replace the BCM.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Control Module References for module replacement, setup, and programming