Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Using Toyota hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected.

For diagnosis and repair procedure, see Fig 2-Fig 7 .

For ECM location, see Figure. For ECM connector view, see Figure. For circuit wiring diagram, see Fig 1. For vacuum or EVAP hose routing, see VACUUM DIAGRAMS article. For testing of systems or components, see BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article or SYSTEM & COMPONENT TESTING - V6 & V8 article. For adjustments, see ON-VEHICLE ADJUSTMENTS - V6 & V8 article. For removal and installation of components, see REMOVAL & INSTALLATION - V6 & V8 article.

Fig 1: Fuel Injector Circuit Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: DTCs P0300 & DTCs P0301-P0308 Diagnostic Procedure (Steps 1-3)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: DTCs P0300 & DTCs P0301-P0308 Diagnostic Procedure (Step 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: DTCs P0300 & DTCs P0301-P0308 Diagnostic Procedure (Steps 5-6)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: DTCs P0300 & DTCs P0301-P0308 Diagnostic Procedure (Step 7)

Fig 6: DTCs P0300 & DTCs P0301-P0308 Diagnostic Procedure (Steps 8-12)

Fig 7: DTCs P0300 & DTCs P0301-P0308 Diagnostic Procedure (Steps 13-16)