Friday, May 13, 2022

2010 Cadillac Truck SRX FWD V6-3.0L Page 2178

2010 Cadillac Truck SRX FWD V6-3.0L Page 2178



* The control module uses default values for all parameters received on the serial data circuits.



* In the TCM, DTC U0073 will cause the transmission to go into default gears.



* In the ECM and TCM, DTC U0073 will cause the malfunction indicator lamp (MIL) to illuminate.



* The control module inhibits the setting of all other communication DTCs.



Conditions for Clearing the DTC



* The ECM/TCM modules turn OFF the MIL after 4 consecutive ignition cycles that the diagnostic runs and does not fail.



* 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 of 50, without a repeat of the malfunction.



Circuit/System Verification



1. Refer to Data Link References (See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and



Inspection/Initial Inspection and Diagnostic Overview) to determine which serial data system is used for a specific control module.



2. This DTC cannot be retrieved with a current status. Diagnosis is accomplished using the symptom. Refer to Symptoms - Data



Communications (See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Symptom Related



Diagnostic Procedures/Symptoms - Data Communications).



U2101



DTC U2101



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 U2101



- CAN Bus Maximum Configuration List



Circuit/System Description



Some control modules must be programmed with software that specifically identifies the correct type and quantity of modules on the serial data bus



based on RPO configuration. If a control module was not properly configured after installation, the appropriate U Code may be set for that module.



No external circuit diagnosis is involved.



Conditions for Running the DTC



* Voltage supplied to the module is in the normal operating voltage range.



* The vehicle power mode requires serial data communication to occur.



Conditions for Setting the DTC



* The control module is not configured properly.



* Control unit recognizes a programming error.



* CAN-Bus configuration is invalid



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

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