DESCRIPTION

On electronic injection systems, there is no longer a load lever that mechanically controls the fuelling. The flow is caculated by the ECM depending on a number of parameters, including pedal position, which is measured using a potentiometer. The pedal sensor has two potentiometers whoses slides are mechanically solid. The two potentiometers are supplied from distinct and different power sources so there is built in redundancy of information giving reliable driver's request information. A voltage is generated across the potentiometer in the acceleration position sensor as a function of the accelerator-pedal setting. Using a peogrammed characteristic curve, the pedal's position is then calculated from this voltage.

SPECIFICATION

Test Condition

Output Voltage (V)

APS1

APS2

Idle

0.14 ~ 0.16

0.073 ~ 0.077

Fully depressed

0.76 ~ 0.88

0.35 ~ 0.47

CIRCUIT DIAGRAM
SIGNAL WAVEFORM
COMPONENT INSPECTION
1.

Disconnect APS connector and connect the voltimeter to the terminals 2 and 5 of APS connector.

2.

Supply the terminal 6 with DC 5V.

3.

Check the voltage between the terminals 2 and 5 on operating pedal.

Idle: 0.14 ~ 0.16V

Fully depressed: 0.76 ~ 0.88V

4.

Disconnect the voltimeter and DC 5V.

5.

Connect the voltimeter to the terminals 1 and 4 of APS connecotr.

6.

Supply the terminal 3 with DC 5V.

7.

Check the voltage between the terminal 1 and 4 on operating pedal.

Idle 0.073 ~ 0.077V

Fully depressed: 0.35 ~ 0.47V

Яндекс.Метрика