Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter [10/2014 - 09/2017]: Description

The radio receiver assembly receives a vehicle speed signal from the combination meter assembly to control the ASL function.

HINT: 

• A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls its respective system based on this pulse signal.
• If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems in the diagram below will not operate normally.