Sunday, November 10, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 681


B3794



DTC B3794



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B3794 08



- Cruise Control Function Request Circuit Signal Invalid



DTC B3794 61



- Cruise Control Function Request Circuit Actuator Stuck



Diagnostic Fault Information



Circuit/System Description



The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control set/coast and resume/accelerate



switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal



on the cruise control switch signal circuit when a switch is applied. The BCM sends a serial data message to the engine control module (ECM),



indicating the status of the cruise control switches.



Conditions for Running the DTC



* The ignition is ON.



* The cruise switch is ON.



Conditions for Setting the DTC



B3794 08



The BCM detects an invalid voltage signal on the cruise control switch signal circuit is present for 0.5 second.



B3794 61



Stuck switch for either Resume/Accel or Set/Coast button for 60 seconds.



Actions Taken When the DTC Sets



* The malfunction indicator lamp (MIL) will not illuminate.



* The cruise control system is disabled.



Conditions for Clearing the DTC



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



* A history DTC will clear after 40 malfunction-free ignition cycles have occurred.



Reference Information



Schematic Reference



* Cruise Control Schematics (See: Cruise Control/Diagrams/Electrical Diagrams)



* Steering Wheel Secondary/Configurable Control Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical



Diagrams/Steering Wheel Secondary/Configurable Control Schematics)

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