Wednesday, January 26, 2022

2010 Cadillac Truck SRX FWD V6-3.0L Page 1105

2010 Cadillac Truck SRX FWD V6-3.0L Page 1105



Action Taken When the DTC Sets



* DTCs P0090, P0091, P0092, P00C8, P00C9, and P00CA are Type A DTCs.



* A message center or an indicator displays Reduced Engine Power.



Conditions for Clearing the DTC



DTCs P0090, P0091, P0092, P00C8, P00C9, and P00CA are Type A DTCs.



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



Fuel System Description (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel System



Description)Fuel System Description (LAU or LY7) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and



Operation/Fuel 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



1. Observe the DTC information with a scan tool. DTC P0090, P0091, P0092, P00C8, P00C9, P00CA, P0685, or P1682 should not set.



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



Code (DTC) List - Vehicle).



2. Ignition ON, command the Fuel Pressure Regulator ON and OFF with a scan tool while observing the following control circuit status



parameters:



* Fuel Pressure Regulator Control Circuit High Voltage Test Status



* Fuel Pressure Regulator Control Circuit Open Test Status



* Fuel Pressure Regulator Control Circuit Low Voltage Test Status



* Fuel Pressure Regulator High Control Circuit High Voltage Test Status



* Fuel Pressure Regulator High Control Circuit Open Test Status



* Fuel Pressure Regulator High Control Circuit Low Voltage Test Status



Each parameter should toggle between OK and Not Run or Not Run and OK.



3. Engine idling, observe the Fuel Rail Pressure Sensor parameter with a scan tool. The pressure should be approximately 1.9-2.1 MPa (279-305



psi).



4. Command an increase and decrease in fuel rail pressure with a scan tool. Observe the scan tool Fuel Rail Pressure Sensor parameter. The



Fuel Rail Pressure Sensor should increase or decrease with each command.



5. 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



1. Ignition OFF, disconnect the harness connector at the G18 high pressure fuel pump.