Electric Adjustable Pedals (EAP) System Components
The adjustable pedals system consists of the following components:
• | The adjustable pedals position switch |
• | The adjustable pedals relay |
• | The adjustable pedals motor |
• | The brake pedal position sensor |
Electric Adjustable Pedals (EAP) System Operation
The adjustable pedal system is controlled by the driver door module and the
driver seat module and operation can occur only while the transmission selector lever
is in the park position. The adjustable pedals 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 adjuster motor is controlled by the driver door module through
the adjustable pedals relay. The adjustable pedals relay supplies battery voltage
and ground to the adjuster motor using two sets of relay coils and switch contacts.
In an inactive state both of the relay switch contacts are closed to ground. The driver
door module controls the adjuster motor by energizing one of the relay coils, closing
the appropriate motor control circuit to the battery voltage supply contact. 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 positive voltage while
the other remains grounded.
The adjustable pedals forward and rearward switches are inputs to the driver
door module. The driver door module supplies the switch assembly with a battery positive
reference voltage. When the switch is operated to the forward or rearward direction
the forward or rearward switch signal circuit is closed to the reference voltage.
In an active state the forward or rearward switch signal circuit voltage is supplied
to the driver door module through one of the 806 ohm resistors within the switch assembly.
The resistors in the switch assembly enables the driver door module to recognize an
invalid switch signal.
The adjustable pedals system is capable of operating in conjunction with the
memory seat system. The driver seat module monitors the location of the adjustable
pedals using the brake pedal position sensor. The brake pedal position sensor is supplied
with 5-volt reference and ground circuits from the driver seat module. The position
sensor signal circuit is referenced from ground within the driver seat module. The
signal voltage monitored by the driver seat module ranges from 0.39 - 4.58 volts and
is determined by the wiper location on the resistor within the position sensor. The
position sensor signal circuit voltage level is used by the driver seat module to
determine the position of the adjustable pedals when storing or recalling memory position
settings. The memory 1 and 2 switches are an inputs to the driver door module and
when a memory recall function is activated, the driver door module and
driver seat module relay information through the Class 2 Serial Data circuit in order
to operate the adjustable pedals assembly in the appropriate direction until the stored
memory position is reached.