Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

Read freeze frame data using the hand-held tester or the OBD II scan tool, as freeze frame data records the engine conditions when a malfunction is detected.

If oscilloscope is available, ignition coil and ignitor operation may be checked by reading IGT and IGF signal waveform pattern with engine cranking or idling. This may be done by monitoring the IGT and IGF signal waveform pattern. It may be checked by connecting oscilloscope between IGT1 - IGT6 circuit and E1, and the IGF and E1. ECM 32-pin connector E6 terminals No. 1 (-) (E1) is ECM sensor ground. IGT and IGF waveform patterns should be properly displayed. See Fig 1.

For circuit wiring diagram, diagnosis and repair procedure, see Fig 2-Fig 6 .

For ECM location, see Figure. For ECM connector view, see Figure. For testing of systems or components, see BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article or SYSTEM & COMPONENT TESTING - V6 & V8 article. For removal and installation of components, see REMOVAL & INSTALLATION - V6 & V8 article.

Fig 1: IGF & IGT Signal Waveform

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Ignition Coil With Ignitor Circuit Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: DTCs P0351, P0352, P0353, P0354, P0355 & P0356 Diagnostic Procedure (Steps 1-2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: DTCs P0351, P0352, P0353, P0354, P0355 & P0356 Diagnostic Procedure (Steps 3-4)

Fig 5: DTCs P0351, P0352, P0353, P0354, P0355 & P0356 Diagnostic Procedure (Steps 5-6)

Fig 6: DTCs P0351, P0352, P0353, P0354, P0355 & P0356 Diagnostic Procedure (Steps 7-8)