Steering Wheel: Description and Operation

STEERING COLUMN: HEATED STEERING WHEEL SYSTEM: SYSTEM DIAGRAM

1. SYSTEM DIAGRAM

SYSTEM DESCRIPTION

1. HEATED STEERING WHEEL SYSTEM

(a) The heated steering wheel heats the steering wheel when the heated steering wheel switch on the outer mirror switch is operated.

(b) The heated steering wheel uses a thermistor inside of the steering wheel to detect the heater temperature and maintain the set temperature.

(c) The heated steering wheel's timer function turns off the heater after a predetermined period of time.

2. HEATER CONTROLLER SYSTEM

(a) Operation description

(1) When the engine switch is on (IG), pressing the heated heated steering wheel controller's momentary switch on the outer mirror switch illuminates the LED and current is output from the steering controller to the heater of the heated steering wheel. Pressing the momentary switch again turns off the LED and stops the current from being output.

(2) A thermostat is installed in the steering wheel as a safety mechanism.

(3) The heated steering wheel switch's LED will blink at 0.3 second intervals when either of the following occurs: 1) an open or short in the steering wheel's thermistor continues for 2 seconds or more; or 2) the outer mirror switch's momentary switch is pressed continuously for 10 seconds or more.

(4) If the normal condition is restored for 2 seconds or more, the previous operation before the malfunction occurred continues. However, regardless of if a malfunction is detected and the malfunction operation is occurring , and regardless of if the normal condition is restored and the system is operating normally, the timer will turn off the heater 30 minutes after the switch was first turned on.

(b) Signal input / output description