Circuit Description
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
The vehicle speed sensor circuit is sent to cruise control ECU as vehicle speed signal. For each rotation of the shaft, the vehicle speed sensor sends a signal through the combination meter to the cruise control ECU. The ECU calculates the vehicle speed from this pulse frequency. See Fig 1.
Detection Item
- Speed signal is not input to the cruise control ECU while cruise control is set.
Trouble Area
- Combination meter.
- Wiring harness or connector between cruise control ECU and combination meter, combination meter and vehicle speed sensor.
- Vehicle speed sensor.
- Cruise control ECU.