Tuesday, May 25, 2021

2010 Cadillac Truck SRX AWD V6-3.0L Page 2157

2010 Cadillac Truck SRX AWD V6-3.0L Page 2157



瀚慖f greater than the specified range, test the serial data circuit for an open/high resistance between the non communicating control module



and a module setting the DTC or a serial data splice pack.



7. If all circuits test normal, replace the control module that is not communicating.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



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



Procedures/Wiring Repairs/GMLAN Wiring Repairs)



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



programming



U05FF



DTC U0400-U05FF



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



Refer to Control Module U Code List (See: Diagnostic Trouble Code Descriptions/Control Module U Code List).



Circuit/System Description



Some control modules are constantly receiving information from other control modules through serial data communication network. The invalid



data code will be set when a receiving control module detects a discrepancy in information it receives from another control module causing its



integrity to be questioned. The symptom byte listed in the DTC Descriptor is for engineering reference only. No external circuit diagnosis is



involved.



Conditions for Running the DTC



Battery voltage is between 9-16 V and data link communications operate normally.



Conditions for Setting the DTC



The control module is not configured properly.



Conditions for Clearing the DTC



* A current DTC clears when the malfunction is no longer present.



* A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.



Reference Information



Schematic Reference



Data Communication Schematics (See: Powertrain Management/Computers and Control Systems/Information Bus/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Data Link Communications Description and Operation (See: Powertrain Management/Computers and Control Systems/Information



Bus/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)

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