PCM Data Description

The following information will assist in diagnosing emission or driveability problems. The technician can view the displays while driving the vehicle. Refer to Powertrain OBD System Check for additional information.

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

ENGINE DATA
^ Engine 1 - Contains general information regarding the fuel delivery, the Ignition Control (IC), the Knock Sensor (KS), the Evaporative Emission ([1][2]EVAP) 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
^ Misfire - Contains the information that is specific to the diagnosis of the misfire and the data that is required in order to verify the proper operation with regard to the misfire.
^ O2S - Contains the information that is specific to the Oxygen Sensor (O2S 1) and the Rear Heated Oxygen Sensor (H02S 2) diagnosis and the data that is required in order to verify the proper operation of the sensors.

DTC DATA
^ Freeze Frame - Contains the information that was collected during the time that a MIL requesting DTC was set. This allows the technician to re-create the conditions when a fault 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.