Diagnosis & Repair
WARNING: This page is about a different car, the 2003 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect VVT (CMP) sensor harness connector. Measure resistance between VVT sensor connector terminals (component side). See Fig 1. 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 resistance is as specified, go to next step. If resistance is not as specified, replace CMP sensor.
- Check for short or open circuit in wiring harness between ECM E2 and E4 connectors and CMP sensor. See Fig 2 and Fig 3
. See ECM E2 CONNECTOR & CMP SENSOR CONTINUITY CHECK . See ENGINE PERFORMANCE
in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Repair wiring as necessary. If wiring harness is okay, go to next step.ECM E2 CONNECTOR & CMP SENSOR CONTINUITY CHECK
Terminals No. Specification - (V5-1) - VVL+ (E2-18) Continuity - (V5-2) - VVL+ (E2-19) Continuity - (V5-2) - VVR+ (E4-19) Continuity - (V5-2) - VVR+ (E4-18) Continuity - (V5-1) Or VVL+ (E2-18) - E1 (E3-7) No Continuity - (V5-2) Or VVL- (E2-19) - E1 (E3-7) No Continuity - (V5-2) Or VVR+ (E4-19) - E1 (E3-7) No Continuity - (V5-2) Or VVR- (E4-18) - E1 (E3-7) No Continuity - Remove and inspect CMP sensor. Also inspect signal plate and timing pulley. If problem exists, replace CMP sensor and/or signal plate as necessary. If problem does not exist, replace ECM.