Sunday, February 6, 2022

2010 Cadillac Truck SRX FWD V6-3.0L Page 1886

2010 Cadillac Truck SRX FWD V6-3.0L Page 1886



* Inspect for a condition in which the throttle valve may have been held open. For example, ice may have formed in the throttle bore causing



the throttle valve not to close.



* A high resistance condition on the throttle position and throttle actuator control circuits could cause a DTC to set.



* A low battery condition may cause a DTC to set.



Reference Information



Schematic Reference



Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics



(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)



Connector End View Reference



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



Description and Operation



Throttle Actuator Control (TAC) System Description (See: Powertrain Management/Computers and Control Systems/Description and



Operation/Throttle Actuator Control (TAC) System Description)



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)



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



Note: A low battery voltage or charging system condition may cause a DTC to set.



1. Ignition ON, observe the DTC information with a scan tool. DTC P0121, P0122, P0123, P0222, P0223, P0562, P0621, P0622, or P2135



should not set.



瀚慖f a DTC sets, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble



Code (DTC) List - Vehicle) for further diagnosis.



2. Clear the DTCs with a scan tool. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power



down.



3. Ignition ON, observe the scan tool TAC Motor parameter. The reading should display Enabled.



4. Observe the DTC information with a scan tool. DTC P1516, P2101, P2119, or P2176 should not set.



Note: If there is a condition with the throttle body, the TAC Motor Command parameter will go to 99 % for a predetermined amount of time



and then a DTC sets. Once a DTC is set, the TAC Motor Command parameter will go to 0 % and the TAC Motor parameter will display



Disabled.



5. Perform the scan tool Throttle Sweep Test while observing the TAC Motor parameter with a scan tool. The TAC Motor parameter should



display Enabled while the Throttle Sweep Test is in progress.



Note: Before replacing the throttle body assembly, make sure the TAC motor control circuits are not shorted to B+.



瀚慖f not the specified value, replace the throttle body assembly.



6. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the



conditions that you observed from the Freeze Frame/Failure Records data.



Circuit/System Testing

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