LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 1994 >> ES 300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Fuel System >> Fuel Pressure Regulator VSV Control Circuit
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel Pressure Regulator VSV Control Circuit

  1. Check fuel pressure regulator VSV. See FUEL PRESSURE REGULATOR VACUUM SWITCHING VALVE (VSV) . If VSV is okay, remove glove box. Turn ignition on. Leave harness connectors attached to ECM. Measure voltage between chassis ground and terminal No. 25 (Black/Red wire) of ECM connector E7. To identify ECM connectors and terminals, see Figure.
  2. If battery voltage is not present, repair circuit between EFI main relay and ECM. If battery voltage is present, check fuel pressure regulator by performing FUEL PRESSURE test under FUEL SYSTEM in BASIC TESTING article in the ENGINE PERFORMANCE section. If fuel pressure regulator is okay, replace ECM.
scientia non olet · About LEMON Manuals