TGTE/Troubleshooting 2JZ-GTE — VSV Circuit for Fuel Pressure Control, page 109

EG-595
ENGINE — 2JZ-GTE ENGINE TROUBLESHOOTING

VSV Circuit for Fuel Pressure Control

CIRCUIT DESCRIPTION

The ECM turns on a VSV (Vacuum Switching
Valve) to draw air into the diaphragm chamber
of the pressure regulator if it detects that the
temperature of the engine coolant is too high
during engine starting.
The air drawn into the chamber increases the
fuel pressure to prevent fuel vapor lock at high
engine temperature in order to help the en-
gine start when it is warm.
Fuel pressure control ends approx. 120 sec.
after the engine is started.
Fi6969

VSV
Pressure
Regulator
ECM
To
Fuel
Intake
Tank
Manifold
(Return)
From Fuel Tank

WIRING DIAGRAM

Engine Control Module

B-R 5
>>EA2 B-R 1 2 W-L 73 FPU
E9
GR 8
>>EA1
VSV for Fuel
Pressure Control
EO1
B+
2 2
5 1
EFI Main Relay
R/B
No. 2
3 2
2 2
GR 24 M-REL
E10
B-Y
2
R/B
No. 2
EFI No. 1
2A
W-B
B
Battery

Fi6938