Diagnosis & Repair
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
- Remove passenger's side lower engine cover for access to crankshaft position sensor. Crankshaft position sensor is located on front of engine, near crankshaft pulley. See Fig 1. Disconnect electrical connector at crankshaft position sensor.
- Using ohmmeter, check resistance between electrical terminals on crankshaft position sensor. Resistance should be 985-1600 ohms with sensor temperature of 14-122°F (-10-50°C) and 1265-1890 ohms with sensor temperature of 122-212°F (50-100°C). If resistance is within specification, go to next step. If resistance is not within specification, replace crankshaft position sensor. See CRANKSHAFT POSITION SENSOR under IGNITION SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.
- Check for open and short in wiring harness and electrical connectors between crankshaft position sensor and ECM. See WIRING DIAGRAMS article. ECM is located behind glove box. See Figure. If wiring harness and electrical connectors are okay, go to next step. If wiring harness or electrical connector is defective, repair as necessary.
- Remove crankshaft position sensor. See CRANKSHAFT POSITION SENSOR under IGNITION SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article. Inspect crankshaft position sensor and teeth on signal plate located on the crankshaft for damage. If crankshaft position sensor or signal plate is damaged, replace components as necessary. If crankshaft position sensor and signal plate are okay, replace ECM.