Saturday, July 6, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 386


* Control Module References (See: Testing and Inspection/Programming and Relearning) for rear object alarm module replacement, setup and



programming



B1424



DTC B1424



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 Descriptor



DTC B1424 00



- Device Voltage Low - Theft Deterrent Module



Diagnostic Fault Information



Circuit/System Description



The theft deterrent module (TDM) monitors the battery positive (B+) voltage available to it. If the voltage at the TDM is between 6-9 volts, and the



voltage being reported by a serial data message is greater than 9 volts, then DTC B1424 00 sets.



Conditions for Running the DTC



The ignition is ON.



Conditions for Setting the DTC



* Voltage at the TDM B+ circuit is between 6-9 volts.



* Reported battery voltage received via serial data is valid and is greater than 9 volts.



* The above conditions have been met for 2 seconds.



Action Taken When the DTC Sets



* The security indicator turns ON.



* The driver information center (DIC) displays the SERVICE THEFT DETERRENT SYSTEM message.



Conditions for Clearing the DTC



* A current DTC clears when the battery voltage at the TDM is greater than 9 volts, or if the voltage reported by serial data is less than 9 volts.



* A history DTC clears after 100 consecutive ignition cycles, if no failures are reported by this diagnostic.



Diagnostic Aids



A low voltage DTC in multiple modules indicates a concern in the charging system.



Reference Information



Schematic Reference



Immobilizer Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Diagrams/Electrical Diagrams/Immobilizer



Schematics)



Connector End View Reference



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



Description and Operation



* Immobilizer Description and Operation (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Description and



Operation/Immobilizer Description and Operation)



* Charging System Description and Operation (See: Starting and Charging/Charging System/Description and Operation)

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