LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0340, DTC P0341, DTC P0345 & DTC P0346 >> Diagnosis & Repair

Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect VVT sensor harness connector. Using ohmmeter, measure resistance between sensor connector terminals. Resistance should be 835-1400 ohms at 14-122°F (-10-50°C) or 1060-1645 ohms at 122-212°F (50-100°C). Check resistance at each VVT sensor. If using oscilloscope, during cranking or idling, check the waveforms between terminals VV1+ and NE-, and VV2+ and NE- of the ECM connector. Waveform frequency is shortened as the engine speed becomes higher. See Figure. Replace sensor(s) as necessary. If sensor(s) is okay, go to next step.
  2. Check for open or short circuit in wiring harness between ECM and VVT sensor. See ENGINE PERFORMANCE in WIRING DIAGRAMS article in ELECTRICAL. Repair as necessary. If wiring harness is okay, remove and inspect sensor(s). Also, inspect signal plate. Replace as necessary. If both components are okay, replace ECM and retest system.
scientia non olet · About LEMON Manuals