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.

NOTE: 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, VVT (CMP) sensor operation may be checked by reading VVT sensor waveform pattern with engine idling. This may be done by monitoring the VVT sensor signal which is referred to as the VV1+ (R/H) and VV2+ (L/H) signal. VVT sensor waveform pattern may be checked by connecting oscilloscope between ECM 32-pin connector E6 terminals No. 27 (VV1+) (R/H) (Red wire) and No. 24 (NE-) (White wire). For VVT2+ (L/H) waveform pattern may be checked between ECM 32-pin connector E6 terminals No. 26 (VV2+) (L/H) (Yellow wire) and No. 24 (NE-) (White wire). ECM is located behind glove box. See Figure. For ECM electrical connector terminal identification, see Figure. VVT sensor waveform patterns should be properly displayed. See Figure.

For diagnosis and repair procedure, see Fig 1 & Fig 2 .

For location of VVT (CMP) sensor, see Fig 5. If necessary to replace VVT (CMP) sensor(s), see Fig 3. For location of VVT (CMP) sensor signal plate, see Fig 4. If necessary to replace VVT (CMP) sensor signal plate, see appropriate ENGINES article. 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: DTCs P0340, P0341, P0345 OR DTC P0346 Diagnostic Procedure (Steps 1-2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: DTCs P0340, P0341, P0345 OR DTC P0346 Diagnostic Procedure (Steps 3-4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: VVT (CMP) Sensor Replacement Procedure

Fig 4: Locating VVT Sensor Signal Plate On Camshaft Timing Gear Assembly

Fig 5: Locating VVT (Camshaft Position) Sensors & Camshaft Timing OCV Assembly