Toyota 2GR-FE, Руководство пользователя

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ES–52
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
FREEZE FRAME DATA
1. DESCRIPTION
The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is
stored. When troubleshooting, freeze frame data can be
helpful in determining whether the vehicle was running or
stopped, whether the engine was warmed up or not,
whether the air/fuel ratio was lean or rich, as well as
other data recorded at the time of a malfunction.
HINT:
If it is impossible to duplicate the problem even though a
DTC is detected, confirm the freeze frame data.
The ECM records engine conditions as freeze frame
data every 0.5 seconds. Using the intelligent tester, five
separate sets of freeze frame data, including the data
values at the time when the DTC was set, can be
checked.
– 3 data set before the DTC was set.
– 1 data set when the DTC was set.
– 1 data set after the DTC was set.
These data sets can be used to simulate the condition
of the vehicle around the time of the occurrence of the
malfunction. The data may assist in identifying of the
cause of the malfunction, and in judging whether it
was temporary or not.
2. LIST OF FREEZE FRAME DATA
DTC was set.
0.5 seconds 0.5 seconds
Freeze frame data which can be read
0.5 seconds
A103809E02
LABEL
(Intelligent Tester Display)
Measurement Item/Range Diagnostic Note
IGN ADVANCE Ignition advance -
CALC LOAD Calculate load Calculated load by ECM
VEHICLE LOAD Vehicle load -
MAF Mass air flow volume
If value is approximately 0.0 g/s:
•
Mass air flow meter power source circuit
open or shorted
• VG circuit open or shorted
If value is 160.0 g/s or more:
•
E2G circuit open
ENGINE SPD Engine speed -
VEHICLE SPD Vehicle speed Speed indicated on speedometer
COOLANT TEMP Engine coolant temperature
If value is -40
°
C (-40
°
F), sensor circuit open
If value is 140
°
C (284
°
F), sensor circuit
shorted
INTAKE AIR Intake air temperature
If value is -40
°
C (-40
°
F), sensor circuit open
If value is 140
°
C (284
°
F), sensor circuit
shorted
FUEL PRESS Fuel pressure -
AIR-FUEL PATIO Air-fuel ratio -
AMBIENT TEMP Ambient temperature -
PURGE DENSITY Learning value of purge density -
PURGE FLOW Purge flow -
EVAP PURGE VSV EVAP purge VSV duty ratio -
KNOCK CRRT VAL Correction learning value of knocking -