Circuit Description
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Toyota Tundra, 2002 Toyota Tacoma, 2002 Toyota Sequoia, 2002 Toyota 4Runner, and 2001 Toyota Tundra. 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. 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 output 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:
- Sensor open or short circuit.
- Sensor malfunction.
- ECM malfunction.