B1475

DTC B1475

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 B1475 00
- Retained Accessory Power Circuit

Diagnostic Fault Information





Circuit/System Description

The body control module (BCM) controls the RUN/ACCY relay through the rap relay coil supply voltage circuit by applying voltage to the coil side of the relay. The RUN/ACCY relay is a PCB relay and is energized when any of the following conditions are true:

* Ignition switch is in ACC or ON.
* The vehicle was remote started.
* The vehicle is in RAP mode.

Conditions for Running the DTC

* The system voltage is between 9-16 volts.
* 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 rap relay coil supply voltage 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

The RUN/ACCY relay is a PCB relay and can only be replaced with the underhood fuse block.

Reference Information
Schematic Reference

Power Moding Schematics (Power Moding Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

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

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector X5 at the BCM.
2. Test for greater than 70 ohms between the RAP/ACCY relay coil control circuit terminal 11 and ground.

• If less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the underhood fuse block.

3. If all circuits test normal, replace the underhood fuse block.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Underhood Electrical Center or Junction Block Replacement (Underhood Electrical Center or Junction Block Replacement)
* Control Module References (Programming and Relearning) for module replacement, setup, and programming