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)

ES-218

P043F

Reference orifice high-flow (built into canister pump module)

P0441

•

Purge VSV (Vacuum Switching Valve) stuck closed

•

Purge VSV stuck open

•

Purge flow

ES-223

P0450

Canister pressure sensor (built into canister pump module) voltage abnormal fluctuation

ES-230

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

ES-239

P0456

EVAP small leak

P2401

Leak detection pump stuck OFF (built into canister pump module)

ES-329

P2402

Leak detection pump stuck ON (built into canister pump module)

P2419

Vent valve stuck closed (built into canister pump module)

ES-335

P2420

Vent valve stuck open (vent) (built into canister pump module)

P2610

Soak timer (built into ECM)

ES-341

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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

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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

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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