Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 100
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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RELATED DTCS
If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below.
EVAP System
DTCs
Monitoring Items
See Page
P043E
Reference orifice clogged (built into canister pump module)
P043F
Reference orifice high-flow (built into canister pump module)
P0441
•
Purge VSV (Vacuum Switching Valve) stuck closed
•
Purge VSV stuck open
•
Purge flow
P0450
Canister pressure sensor (built into canister pump module) voltage abnormal fluctuation
P0451
•
Canister pressure sensor (built into canister pump module) noise
•
Canister pressure sensor (built into canister pump module) signal becomes fixed/flat
P0452
Canister pressure sensor (built into canister pump module) voltage low
P0453
Canister pressure sensor (built into canister pump module) voltage high
P0455
EVAP gross leak
P0456
EVAP small leak
P2401
Leak detection pump stuck OFF (built into canister pump module)
P2402
Leak detection pump stuck ON (built into canister pump module)
P2419
Vent valve stuck closed (built into canister pump module)
P2420
Vent valve stuck open (vent) (built into canister pump module)
P2610
Soak timer (built into ECM)
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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NOTICE:
If the reference pressure difference between the first and second checks is greater than the
specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and
P2419) are stored.
Malfunctioning Areas
Reference orifice clogged
Reference orifice high-flow
Purge VSV stuck open
Purge VSV stuck closed
Canister pressure sensor fixed
output
Canister pressure sensor noise
Canister pressure sensor high
output
Canister pressure sensor low
output
Gross leak
Small leak
Leak detection pump stuck OFF
Leak detection pump stuck ON
Vent valve stuck closed
Vent valve stuck open (vent)
DTCs
P043E
P043F
P0441
P0451 P0452 P0453 P0455 P0456
P2401
P2402
P2419 P2420
P0450
A106731E11
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–357
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DESCRIPTION
NOTICE:
The canister is located near the fuel tank, underneath the body.
- Canister Pressure Sensor
- Leak Detection Pump
Purge Line
- Vent Valve
Canister Filter
Air Inlet Port
Bleeding Pipe
EVAP Hose (To Intake
Air Surge Tank)
Refueling Valve
Purge VSV
EVAP Hose (From Canister)
Canister
Fuel Tank
Fuel Cap
Location of EVAP (Evaporative Emission) System:
Canister Pump Module
A112655E01
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
NOTICE:
In this vehicle's EVAP system, turning ON the vent valve does not seal off the EVAP system. To
check for leaks in the EVAP system, disconnect the air inlet vent hose and apply pressure from
the atmosphere side of the canister.
While the engine is running, if a predetermined condition (closed-loop etc.) is met, the purge VSV is
opened by the ECM and stored fuel vapors in the canister are purged into the intake manifold. The ECM
changes the duty cycle ratio of the purge VSV to control purge flow volume.
The purge flow volume is also determined by the intake manifold pressure. Atmospheric pressure is
allowed into the canister through the vent valve to ensure that the purge flow is maintained when the
negative pressure (vacuum) is applied to the canister.
The following two monitors run to confirm appropriate EVAP system operation.
1.
Key-off monitor
This monitor checks for EVAP (Evaporative Emission) system leaks and canister pump module
malfunctions. The monitor starts 5 hours
*
after the ignition switch is turned OFF. More than 5 hours
are required for the fuel to cool down to stabilize the EVAP pressure, thus making the EVAP system
monitor more accurate.
The leak detection pump creates negative pressure (vacuum) in the EVAP system and the pressure
is measured. Finally, the ECM monitors for leaks from the EVAP system, and malfunctions in both the
canister pump module and purge VSV, based on the EVAP pressure.
HINT:
*
: If the engine coolant temperature is not below 35
°C (95°F) 5 hours after the ignition switch is turned
off, the monitor check starts 2 hours later. If it is still not below 35
°C (95°F) 7 hours after the ignition
switch is turned off, the monitor check starts 2.5 hours later.
2.
Purge flow monitor
The purge flow monitor consists of the two monitors. The 1st monitor is conducted every time and the
2nd monitor is activated if necessary.
•
The 1st monitor
While the engine is running and the purge VSV (Vacuum Switching Valve) is ON (open), the ECM
monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not
created, the ECM begins the 2nd monitor.
EVAP System Circuit:
Intake Manifold
Purge VSV
Restrictor (0.08 inch)
Roll-Over Valve
Fuel Tank
Canister
Throttle Valve
Air Cleaner
Soak Timer
Canister Pump Module
Fuel Cap
Cut-off Valve
Refueling Valve
Canister Filter
ECM
A122570E02
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