Eldorado Touring V8-4.6L VIN 9 (1998)
engine start-up and vehicle operation such that the coolant temperature has risen greater than a certain value (typically 40°F) from start-up
temperature and reached a minimum temperature of 160°F. If this condition is not met during the ignition cycle, the DTC may not run.
Freeze Frame Data
Description
Government regulations require that engine operating conditions be captured whenever the MIL is illuminated. The data captured is called Freeze Frame
data. The Freeze Frame data is very similar to a single record of operating conditions.
Operation
Whenever the MIL is illuminated, the corresponding record of operating conditions is recorded as Freeze Frame data. A subsequent failure will not
update the recorded operating conditions.
The Freeze Frame data parameters stored with a DTC failure include the following:
^
Air Fuel Ratio
^
Air Flow Rate
^
Fuel Trim
^
Engine Speed
^
Engine Load
^
Engine Coolant Temperature
^
Vehicle Speed
^
TP Angle
^
MAP/BARO
^
Injector Base Pulse Width
^
Loop Status
Freeze frame data can only be overwritten with data associated with a misfire or fuel trim malfunction. Data from these faults take precedence over data
associated with any other fault. The Freeze Frame data will not be erased unless the associated history DTC is cleared.
Failure Records Data
Description
In addition to Freeze Frame data the PCM may also store Failure Records data when a DTC reports a failure. Unlike Freeze Frame data, Failure Records
data can be stored by DTCs that DO NOT illuminate the MIL.
Operation
Failure Records save many more relevant data parameters than Freeze Frame records. Which data parameters are saved varies based on the DTC set.
Transaxle DTC Failure Records generally contain transaxle related data parameters while fuel DTC Failure Records generally contain fuel related data
parameters. If several DTCs are set, Failure Records for the three most recently set DTCs will be saved. Freeze Frame, Failure Records data may be
retrieved through the Diagnostic Trouble Code menu on scan tool. If more than one DTC is set review the odometer or engine run time data located in
the Freeze Frame, Failure Records info to determine the most current failure.
Keep in mind that once Freeze Frame or Failure Record is selected, the parameter and input data displayed will look just like the normal PCM data
except the parameters will not vary since it is displaying recorded data.
IMPORTANT: Always capture the Freeze Frame and Failure Records information with the scan tool BEFORE proceeding with diagnosis. Clearing
DTCs, disconnecting the battery, disconnecting PCM or body connectors or procedures performed during diagnosis may ERASE or overwrite the stored
Freeze Frame and Failure Records data. Loss of this data may prevent accurate diagnosis of an intermittent or difficult to set DTC.
Capturing DTC Info (Capture Info)
Description
