2GR-FE ENGINE CONTROL SYSTEM
– SFI SYSTEM
ES–283
ES
HINT:
*: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.
1. P0455: EVAP (Evaporative Emission ) gross leak
In operation C, the vacuum pump creates negative pressure (vacuum) in the EVAP system and the
EVAP system pressure is measured. If the stabilized system pressure is higher than [second 0.02 inch
leak pressure standard x 0.2] (near atmospheric pressure), the ECM determines that the EVAP system
has a large leak, illuminates the MIL and sets the DTC (2 trip detection logic).
B
First 0.02 inch leak pressure
measurement
In order to determine 0.02 inch leak pressure standard,
vacuum pump creates negative pressure (vacuum)
through 0.02 inch orifice and then ECM checks if
vacuum pump and vent valve operate normally.
60 seconds
C
EVAP system pressure
measurement
Vent valve turned ON (closed) to shut EVAP system.
Negative pressure (vacuum) created in EVAP system,
and EVAP system pressure then measured.
Write down measured value as they will be used in leak
check.
If EVAP pressure does not stabilize within 15 minutes,
ECM cancels EVAP system monitor.
15 minutes*
D
EVAP VSV monitor
EVAP VSV opened and then EVAP system pressure
measured by ECM.
Large increase indicates normal.
10 seconds
E
Second 0.02 inch leak pressure
measurement
After second 0.02 inch leak pressure measurement,
leak check performed by comparing first and second
0.02 inch leak pressure standards.
If stabilized system pressure higher than second 0.02
inch leak pressure standard, ECM determines that
EVAP system leaking.
60 seconds
F
Final check
Atmospheric pressure measured and then monitoring
result recorded by ECM.
-
Sequence
Operation
Description
Duration
Operation A: Atmospheric Pressure Measurement
Operation C: EVAP System Pressure Measurement
Operation B, E:
0.02 Inch Leak Pressure Measurement
Operation D: Purge VSV Monitor
Canister
Fuel tank
Vent Valve: OFF (vent)
Pump Module
Air Filter
ON (closed)
ON (closed)
Purge VSV: OFF
0.02 Inch
Orifice
Atmospheric
Pressure
Negative
Pressure
Vacuum
Pump: OFF
ON
ON
ON
ON
OFF
OFF (vent)
OFF
A106055E15
Summary of Contents for 2GR-FE
Page 176: ...ES 20 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES NEXT 20 CONDUCT CONFIRMATION TEST END ...
Page 247: ...2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES 91 ES OK REPLACE ECM See page ES 518 ...
Page 412: ...ES 256 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES A END ...
Page 447: ...2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES 291 ES OK REPLACE ECM See page ES 518 ...
Page 556: ...ES 400 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES A REPLACE TCM ...
Page 630: ...ES 474 2GR FE ENGINE CONTROL SYSTEM SFI SYSTEM ES OK REPLACE ECM See page ES 518 ...
Page 658: ...2GR FE ENGINE CONTROL SYSTEM VVT SENSOR ES 493 ES 22 INSTALL ENGINE UNDER COVER LH ...
Page 897: ...2GR FE STARTING SMART KEY SYSTEM ST 35 ST OK REPLACE MAIN BODY ECU ...
Page 923: ...2GR FE STARTING SMART KEY SYSTEM ST 61 ST OK REPLACE MAIN BODY ECU ...
Page 935: ...2GR FE STARTING SMART KEY SYSTEM ST 73 ST OK REPLACE MAIN BODY ECU ...
Page 940: ...ST 78 2GR FE STARTING SMART KEY SYSTEM ST OK REPLACE MAIN BODY ECU ...
Page 958: ...ST 96 2GR FE STARTING SMART KEY SYSTEM ST OK END MAIN BODY ECU DEFECTIVE ...