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Home >> Lexus >> 2000 >> ES 300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0340: Variable Valve Timing (VVT) Sensor Circuit >> Diagnosis & Repair

Diagnosis & Repair

  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.
  2. Replace sensor(s) as necessary. If sensor(s) is okay, check for open or short circuit in wiring harness between ECM and VVT sensor. See appropriate wiring diagram in WIRING DIAGRAMS article. 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.
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