2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 458

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 458

Diagnostic Fault Information

Circuit/System Description

The retained accessory power (RAP) system allows specific vehicle functions to operate after the ignition is turned OFF for a predetermined time.

The RAP relay is internal to the BCM. Relay RAP is controlled by the BCM using inputs from the door ajar switches to determine control of the

relay when the ignition is turned OFF. Radio RAP is controlled by a serial data message from the BCM using inputs from the driver door open

switch. Refer to Retained Accessory Power Description and Operation (See: Power and Ground Distribution/Description and Operation/Retained

Accessory Power Description and Operation) for more detail on RAP operation.

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 detected in the RAP supply voltage circuit.

Action Taken When the DTC Sets

The BCM 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 RAP/Spare relay is permanently soldered to the left I/P junction block and is non-serviceable.

* The RAP mode for the radio and door modules is a separate function and will still operate properly.

Reference Information

Schematic Reference

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

Moding Schematics)

Connector End View Reference

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

Description and Operation

Retained Accessory Power Description and Operation (See: Power and Ground Distribution/Description and Operation/Retained Accessory Power

Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

1. Ignition ON, verify DTC B1475 is set as current.