2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2872

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2872

DTC P2227 is a Type B DTC.

Conditions for Clearing the DTC

DTC P2227 is a Type B DTC.

Reference Information

Schematic Reference

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

Connector End View Reference

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

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

Special Tools

* J-23738-A Mityvac

* J-35555 Metal Mityvac

Circuit/System Verification

1. Ignition OFF, open the hood to disable the Auto-Stop function. Refer to Hybrid Modes of Operation Description ( See: Hybrid Drive

Systems/Description and Operation/Hybrid Modes of Operation).

2. Ignition ON, verify the scan tool hood position parameter displays Open.

瀚慖f the hood position does not display Open, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) for DTC P254F.

3. Ignition ON, observe the scan tool MAP and BARO sensor parameters. The readings should be within 5 kPa, and within the range specified

in the Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and Control Systems/Specifications/Altitude Versus

Barometric Pressure) table for the current altitude.

4. 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. Engine idling, move the related harnesses/connectors at the BARO sensor and at the ECM while observing the scan tool BARO sensor

parameter. The scan tool BARO parameter should be steady.

瀚慖f the parameter does not perform as specified, repair the harness/connectors as necessary.

2. If all circuits test normal, test or replace the BARO sensor.

Component Testing

Note: You must perform the Circuit/System Testing before proceeding with the Component Test.

1. Ignition OFF, remove the BARO sensor.

2. Install a 3 A fused jumper wire between the 5 V reference terminal 1 and the corresponding terminal of the BARO sensor.

3. Install a jumper wire between the low reference terminal 2 of the BARO sensor and ground.

4. Install a jumper wire at terminal 3 of the BARO sensor.

5. Connect a DMM between the jumper wire from terminal 3 of the BARO sensor and ground.