Saturday, February 8, 2020

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1943

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1943



The ECM detects that the BARO sensor voltage is greater than 4.87 V for 1 s.



Action Taken When the DTC Sets



DTCs P2227, P2228, and P2229 are Type B DTCs.



Conditions for Clearing the MIL/DTC



DTCs P2227, P2228, and P2229 are Type B DTCs.



Reference Information



Schematic Reference



Engine Controls Schematics (LLT) (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)



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. Start the engine. Observe the DTC information with a scan tool. DTCs P2227, P2228, or P2229 should not set.



2. 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. Inspect the atmospheric vent on the K20 ECM case for one of the following conditions:



* Moisture in the vent inlet



* Debris in the vent inlet



瀚慖f a condition exists, attempt to clean or dry the atmospheric inlet.



2. Start the engine. Observe the DTC information with a scan tool. DTCs P2227, P2228, or P2229 should not set.



瀚慖f DTC P2227, P2228, or P2229 sets, replace the K20 ECM.



Repair Instructions



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



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



programming



P2230



DTC P2227-P2229, or P2230 (LF1)



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.

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