Saturday, April 20, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 397


DTC B1449 07



- Remote Device Voltage Above Threshold



Diagnostic Fault Information



Circuit/System Description



The infrared module is supplied with 10.5 volts from the rear audio/HVAC module when the rear audio system is active. The infrared module is



permanently grounded at G300.



Conditions for Running the DTC



* Ignition ON.



* Battery voltage must be between 9-16 volts.



Conditions for Setting the DTC



The DTC will set when the rear audio/HVAC module detects a short to voltage, short to ground, or an open/high resistance in the infrared module



voltage signal circuit.



Action Taken When the DTC Sets



The rear audio/HVAC module sets the DTC and the infrared module will be disabled.



Conditions for Clearing the DTC



* The condition responsible for setting the DTC no longer exists.



* A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.



Reference Information



Schematic Reference



Radio/Navigation System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Radio/Navigation System



Schematics)



Connector End View Reference



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



Description and Operation



Video Entertainment System Description and Operation (Non-Headrest DVD Systems) (See: Accessories and Optional Equipment/Description and



Operation/Video Entertainment System Description and Operation (Non-Headrest DVD Systems))Video Entertainment System Description and



Operation (Dual Headrest DVD Systems) (See: Accessories and Optional Equipment/Description and Operation/Video Entertainment System



Description and Operation (Dual Headrest DVD Systems))



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 OFF, disconnect the harness connector at the infrared module.



2. Ignition OFF, test for less than 5.0 ohms between the ground circuit terminal 12 and ground.



锟斤拷 If greater than the specified range, test the ground circuit for an open/high resistance.

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