B1475

DTC B1475

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B1475 00
- Accessory Delay Module Circuit

Diagnostic Fault Information






Circuit/System Description

The body control module (BCM) controls the RAP relay through the rap relay coil supply voltage circuit by applying voltage to the coil side of the relay. The RAP relay 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.

Circuit/System Testing

1. Ignition OFF, Disconnect the harness connector at the BEC.
2. Connect a test lamp between the RAP relay supply voltage circuit and ground. Close all vehicle doors.
3. Observe the test lamp, cycle the ignition key to the RUN position and back to the OFF position, wait 10 seconds, open the driver door. The test lamp should turn ON when key is in RUN, and remain on until the driver door is opened.

• If the test lamp is always OFF, test the relay coil control circuit for a short to ground. If the circuit tests normal, replace the BCM.
• If the test lamp is always ON, refer to Retained Accessory Power (RAP) Malfunction. Retained Accessory Power (RAP) Malfunction

4. If all circuits test normal, test or replace the BEC.

Repair Instructions

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