Circuit Description
WARNING: This page is about a different car, the 2002 Toyota Land Cruiser, 2002 Lexus LX 470, 2001 Toyota Land Cruiser, and 2001 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
No. 2 vehicle speed sensor detects transmission output shaft RPM and sends signals to ECM. An AC voltage is generated in No. 2 vehicle speed sensor coil as rotor mounted on output shaft rotates. See Figure. This voltage is sent to ECM. Gear shift point and lock-up timing are controlled by ECM based on signals from No. 2 vehicle speed sensor and throttle position sensor. If No. 2 vehicle speed sensor malfunctions, ECM uses input signals from No. 1 vehicle speed sensor as a back-up signal. DTC is set when no signal is detected from No. 2 vehicle speed sensor while No. 1 vehicle speed sensor sends 4 pulses to ECM. Vehicle speed is more than 5.6 MPH for at least 4 seconds. Possible causes are:
- Open or short in sensor circuit.
- Sensor malfunction.
- ECM malfunction.