EG-481 ENGINE — 2JZ-GE ENGINE TROUBLESHOOTING VSV Circuit for Fuel Pressure Control (Only for California spec.) CIRCUIT DESCRIPTION The ECM turns on a VSV (Vacuum Switching Valve) to draw air into the diaphragm cham- ber 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 engine start when it is warm. 'Fuel pressure control ends approx. 120 sec. after then engine is started. FI6897 VSV Pressure Regulator ECM Injectors To Fuel Intake Tank Manifold (Return) From Fuel Tank WIRING DIAGRAM Engine Control Module B-R 3 B-R 1 2 W-L 36 >>EA3 E9 FPU GR 8 >>EA1 VSV for Fuel Pressure Control E01 B+ 2 2 5 1 R/B 3 2 No. 2 EFI Main Relay 2 2 B-Y 2 R/B No. 2 EFI No. 1 2A W-B B Battery GR 24 E10 M-REL FI6950