When the engine switch is turned on (IG), the IG power source circuit supplies positive voltage to the multiplex tilt & telescopic ECU.

The multiplex tilt & telescopic ECU also receives engine switch signals via this circuit.

The signals generated by operating the manual switch are sent to the multiplex tilt & telescopic ECU through the communication bus.

This is the power source for the motors.

The telescopic motor is operated by the power source voltage supplied from the multiplex tilt & telescopic ECU and slides the steering column forward and backward. The telescopic position sensor (hall IC) in the telescopic motor detects the sliding position in the forward and backward directions of the steering column and outputs a signal to the CPU based on that sliding amount.

The multiplex tilt & telescopic ECU forms a network with the ECUs of other systems through the communication bus. Each ECU informs the other ECUs that they are connected to the network by outputting a specified signal (periodic signal) onto the communication bus on a regular basis. The multiplex tilt & telescopic ECU receives vehicle speed signals from the combination meter via the communication bus to prevent improper operation of the auto away/return function during driving.

The tilt motor is operated by the power source voltage supplied from the multiplex tilt & telescopic ECU and makes the steering column tilt up and down. The tilt position sensor (hall IC) in the tilt motor detects the tilt angle of the steering column and outputs a signal to the CPU based on that tilt.

The multiplex tilt & telescopic ECU forms a network with the ECUs of other systems through the communication bus. Each ECU informs the other ECUs that it is connected to the network by outputting a specified signal (periodical signal) onto the communication bus on a regular schedule. The multiplex tilt & telescopic ECU detects the connection of each ECU based on the signal.

The ECU power source circuit supplies positive voltage to the multiplex tilt & telescopic ECU.

A key code confirmation signal (ON or OFF) is sent from the power source control ECU to the multiplex tilt & telescopic ECU via the communication bus.

The multiplex tilt & telescopic ECU uses this signal to operate the auto away/return function.

If a DTC is displayed, check the circuit for that code listed in the table below.