Scan Tool Data List: Overview

ENGINE SCAN TOOL DATA LIST
The following information will assist in diagnosing emission or driveability problems. The technician can view the displays while the vehicle is being driven. Refer to On-Board Diagnostics (OBD) System Check for additional information. Testing and Inspection

The data messages displayed on the scan tool are divided into Engine, Specific Engine, and Diagnostic Trouble Code (DTC) lists as follows:

Engine Data
^ Engine 1 - Contains general information regarding the fuel delivery, the Ignition Control (IC), the Knock Sensor (KS), and the basic engine operating conditions.
^ Engine 2 - Contains general information regarding the fuel delivery Output Controls, the Ignition Control (IC), the Air Conditioning (A/C), the cruise control, and the basic engine operating conditions.

Specific Engine Data
^ Exhaust Gas Recirculation (EGR) - Contains the information specific to the Exhaust Gas Recirculation System (EGR) and the Evaporative Emissions System (EVAP) required for diagnosis.
^ Misfire - Contains the information specific to the diagnosis of the misfire and the data required to verify the proper operation with regard to the misfire.
^ 02S - Contains information specific to the Oxygen Sensor (O2S 1) and the Rear Heated Oxygen Sensor (HO2S 2) diagnosis and the data required to verify the proper operation of the sensors.

DTC Data
^ Freeze Frame - Contains Information collected at the time a type A or a type B DTC Malfunction Indicator Lamp (MIL) illuminates. This allows the technician to re-create the conditions when a MIL occurred and to verify the proper operation within these conditions.
^ Failure Records - Contains the information at the time a diagnostic test failed and set a DTC. The failure records data is not necessarily associated with the MIL.

TEST CONDITIONS
Idle / Upper Radiator Hose Hot / Closed Throttle / Transmission in Park / Closed Loop / Accessories Off / Brake Not Applied.