Thursday, March 3, 2022

2010 Cadillac Truck SRX FWD V6-3.0L Page 1478

2010 Cadillac Truck SRX FWD V6-3.0L Page 1478



Conditions for Running the DTC



Note: The ECM detects engine movement by sensing the airflow through the MAF sensor when airflow is greater than 3 g/s, or by sensing



crankshaft position sensor pulses.



* DTC P0102, P0103, P0335, P0336, P0641, P0651, or P0697 is not set.



* The engine is cranking or running.



* The DTC runs continuously when the above conditions are met.



Conditions for Setting the DTC



* The ECM detects that the starter is commanded ON and the engine has been cranking for more than 4 seconds without a camshaft position



sensor pulse.



* The ECM detects that the engine has started, but did not receive a camshaft position sensor pulse during the first engine revolution.



* The ECM detects that the engine is running, but does not receive a camshaft position sensor pulse for 800 of 1,000 engine cycles.



Action Taken When the DTC Sets



* DTCs P0340, P0345, P0365, and P0390 are Type B DTCs.



* The camshaft position actuator is commanded to the Home or Parked position.



Conditions for Clearing the MIL/DTC



DTCs P0340, P0345, P0365, and P0390 are Type B DTCs.



Diagnostic Aids



* With a DTC set, the engine may crank for an extended period of time at start-up.



* The cylinder 1 intake camshaft position sensor is used for injector and ignition system synchronization. A stalling condition will occur if the



CMP sensor signal is intermittent and a DTC will not set. Inspect all cylinder 1 intake camshaft position sensor circuits for poor connections.



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



Electronic Ignition System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Electronic



Ignition 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



Engine Control Module Scan Tool Information (LF1,LFW) (See: Powertrain Management/Computers and Control Systems/Testing and



Inspection/Scan Tool Testing and Procedures)Engine Control Module Scan Tool Information (LAU) (See: Powertrain Management/Computers



and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures) for scan tool information



Circuit/System Verification



1. With the ignition OFF, inspect the engine wiring harnesses carrying the B23 camshaft position sensor circuits for the following conditions:



* Close routing of aftermarket electrical equipment

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