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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 98 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0340, DTC P0341, DTC P0345 Or DTC P0346 >> Diagnosis & Repair

Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check resistance of VVT sensor. Disconnect CMP sensor harness connector. Measure resistance between VVT sensor connector terminals (component side). Resistance should be 835-1400 ohms with engine temperature at 14-122°F (-10-50°C), or 1060-1645 ohms with engine temperature at 122-212°F (50-100°C). If using oscilloscope, during idling, check the waveform between terminals VVL+ and VVL-, and VVR+ and VVR- of the ECM connector. The waveform frequency is shortened as the engine speed becomes higher. See Fig 1. If resistance or waveforms are not as specified replace VVT sensor. If resistance or waveforms are to specification, go to next step.
    Fig 1: Checking VVL Signal Waveform
    G00165135Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Check for short or open circuit in wiring harness between ECM E5 or E4 connector and CMP sensor. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair wiring as necessary. If wiring harness is okay, go to next step.
  3. Remove and inspect VVT sensor. Also inspect signal plate. If problem exists, replace sensor and/or signal plate as necessary. If problem does not exist, replace ECM.
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