FCAR F3SN USER MANUAL
33
5.3.8 Data Frame Freeze
When the trouble code related to automobile engine
exhaust emissions appears, ECU control system not
only set one trouble code, as shown in Figure 5.4.8A,
but also record the relevant system operating
parameters while the trouble code appears. The series
data are called freeze frame data.
If users choose trouble code
【
0080 Barometric
pressure sensor voltage exceeds the upper limit
threshold value
】
to enter a submenu, the following
content will be displayed in the menu.
【
RPM
】
,
【
Accelerator pedal
】
,
【
Intake air pressure,
【
Rail pressure
】
,
【
Vehicle speed
】
,
【
Water
temperature
】
,
【
Injection volume
】
,
【
Intake air
temperature
】
,
【
Barometric pressure
】
,
【
Engine oil
temperature
】
and
【
Loading rate
】
are displayed
separately.
These data shows relevant data changes detected by
ECU when the trouble code 0080 appears and it is
convenient for users to make analysis and
comparison according to the current conditions so as
to know about the fundamental causes of the system
fault and solve the fault quickly.
Note: Not all systems have the function of data
frame freeze. When checking the system with this
function, data stream item detected vary
according to different trouble codes.
5.3.9
Action Test
This is used to check whether the executive
components of electric system and wires work
normally or not. Actuator items are set according to
ECU. The components of the current electric system
can be executed.