Engine Controls - Introduction (Hybrid): Introduction: Preface

This service information provides a step-by-step approach for diagnosing driveability, emission, powertrain and hybrid electric control system symptoms. Before beginning diagnosis, it may be helpful to reference any Technical Service Bulletins (TSBs) or On-line Automotive Service Information System (OASIS) information when this is available. The TSB/OASIS information is available on the Professional Technician Society (PTS) or Motorcraft® website.

This service information is used in conjunction with the appropriate service information and the appropriate Wiring Diagrams article. The service information is used to provide additional diagnostics when directed by this information. The service information is also used for component removal and installation information. Refer to the appropriate Wiring Diagrams for vehicle-specific wiring information and component, connector and splice location.

The following is a description of the information contained in each section of this service information.

Section 1: Description And Operation 

This information contains description and operation information on powertrain control systems and components. This information is designed to give the technician a general knowledge of the powertrain control and hybrid electric system. Use this information when general information about the powertrain control system or hybrid electric system is desired.

Section 2: Diagnostic Methods 

This service information contains information on specific diagnostic tasks that are used during diagnosis. Descriptions of specific diagnostic methods are included, as well as detailed instructions on how to access or carry out the task.

Section 3: Symptom Charts 

This service information is where all diagnosis begins in the Powertrain Control Module (PCM)/Secondary On board Diagnostic Module C (SOBDMC) Quick Test. If the Powertrain Control Module (PCM)/Secondary On board Diagnostic Module C (SOBDMC) Quick Test is completed and no DTCs are retrieved, the technician may be directed to the NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX . The No Diagnostic Trouble Code (DTC) Present Symptom Chart Index contains the list of symptoms addressed in service information, and sends the technician to the appropriate chart in the NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHARTS . If no PCM or SOBDMC DTCs are present and the vehicle symptom is not listed in the No Diagnostic Trouble Code (DTC) Present Symptom Chart Index, the technician should go to the appropriate service information to continue diagnosis.

Section 4: Powertrain DTC Charts and Descriptions 

This service information contains the Diagnostic Trouble Code (DTC) Charts and Descriptions . These charts and descriptions are referenced if a DTC is retrieved in . Also included in this service information are the list of possible causes and diagnostic aids.

Section 5: Pinpoint Tests 

This service information contains all pinpoint tests. Never enter a pinpoint test unless directed there. When directed to a pinpoint test, always read the information included at the beginning of the pinpoint test.

Section 6: Reference Values 

This service information contains the Typical Diagnostic Reference Values charts. The technician is directed to these charts from PINPOINT TEST Z .