Circuit/System Description
Ground is supplied at all times to the adjustable pedal switch. When the pedal switch is pressed, a 5 V reference voltage is applied through the switch contacts and the switch signal circuit to the memory seat control module. The memory seat control module then commands the adjustable pedals motor to move in response to the switch signal.
The memory seat control module monitors the location of the adjustable pedals using the adjustable pedals position sensor. The adjustable pedals position sensor is supplied with 5 V reference and ground circuits from the memory seat control module. The position sensor signal circuits are referenced from ground within the memory seat control module. The signal voltage monitored by the module ranges from 0.22-4.75 V and is determined by the wiper location on the resistor within the position sensor.
After replacement of adjustable pedal mechanical components or if the memory seat control module is reprogrammed or replaced, the adjustable pedals softstop positions must be learned.
The adjustable pedal assembly is moved forward or backward by a motor which is fixed to the brake pedal actuator with a drive cable to the accelerator pedal actuator. The memory seat control module controls the adjustable pedal motor by applying battery voltage to one of the outputs and ground to the other. The adjustable pedal motor is bidirectional and the direction of the pedal assembly travel is determined by which of the motor control circuits is switched to battery positive voltage while the other is grounded. The adjustable pedal forward and rearward switches are inputs to the memory seat control module. When the switch is operated to the forward or rearward direction, it supplies a ground path for the signal inputs from the memory seat control module.
Adjustable Pedals System Operation
The adjustable pedals are not operable when the cruise control is engaged.
The adjustable pedal system is controlled by the memory seat module. The adjustable pedals are moved forward or backward by a motor which is fastened to the brake pedal assembly with drive cables to the brake and accelerator pedal actuators.
The adjuster motor is controlled by the memory seat control module through two motor control circuits. In an inactive state both control circuits are closed to ground within the module. The memory seat control module drives the adjuster motor in the forward or rearward direction by closing the appropriate control circuit to battery voltage. The adjuster motor is bidirectional and the direction of the pedal assembly travel is determined by which of the motor control circuits is switched to battery voltage while the other remains grounded.
The adjustable pedals forward and rearward switches are inputs to the module. Battery voltage is supplied to the switch from the memory seat control module. When the switch is operated to the forward or rearward direction the forward or rearward switch signal circuit is closed to the battery voltage circuit. Battery voltage on a switch signal circuit indicates to the memory seat control module that the switch is active.
The memory seat control module monitors the locations of the adjustable pedals using the adjustable pedals position sensor. The position sensor is supplied with a 5 V reference and ground circuit from the memory seat control module. The position sensor signal circuit is referenced from ground within the module. The position sensor signal circuit voltage levels are used by the memory seat control module to determine the positions of the adjustable pedals when storing or recalling memory position settings. Anytime adjustable pedal system components are replaced, including the memory seat control module, the system will not operate until the calibration procedure has been performed. Refer to Adjustable Pedal System Calibration .